Merge branch 'linus' into x86/iommu

Conflicts:
	lib/swiotlb.c

Signed-off-by: Ingo Molnar <mingo@elte.hu>

36 files changed, 469 insertions, 222 deletions

diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index b1d08a8f500..e6b4606e36b 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -1499,7 +1499,7 @@ static int __devinit piix_init_one(struct pci_dev *pdev,
 	 * off.
 	 */
 	if (pdev->vendor == PCI_VENDOR_ID_INTEL && pdev->device == 0x2652) {
-		int rc = piix_disable_ahci(pdev);
+		rc = piix_disable_ahci(pdev);
 		if (rc)
 			return rc;
 	}
diff --git a/drivers/ata/sata_inic162x.c b/drivers/ata/sata_inic162x.c
index 3ead02fe379..5032c32fa50 100644
--- a/drivers/ata/sata_inic162x.c
+++ b/drivers/ata/sata_inic162x.c
@@ -96,6 +96,7 @@ enum {
 	PORT_SCR		= 0x20,
 
 	/* HOST_CTL bits */
+	HCTL_LEDEN		= (1 << 3),  /* enable LED operation */
 	HCTL_IRQOFF		= (1 << 8),  /* global IRQ off */
 	HCTL_FTHD0		= (1 << 10), /* fifo threshold 0 */
 	HCTL_FTHD1		= (1 << 11), /* fifo threshold 1*/
@@ -540,7 +541,7 @@ static unsigned int inic_qc_issue(struct ata_queued_cmd *qc)
 	void __iomem *port_base = inic_port_base(ap);
 
 	/* fire up the ADMA engine */
-	writew(HCTL_FTHD0, port_base + HOST_CTL);
+	writew(HCTL_FTHD0 | HCTL_LEDEN, port_base + HOST_CTL);
 	writew(IDMA_CTL_GO, port_base + PORT_IDMA_CTL);
 	writeb(0, port_base + PORT_CPB_PTQFIFO);
 
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index f1489999cf9..49a8c589e34 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -1933,7 +1933,6 @@ static void ide_cd_remove(ide_drive_t *drive)
 
 	ide_proc_unregister_driver(drive, info->driver);
 
-	blk_unregister_filter(info->disk);
 	del_gendisk(info->disk);
 
 	ide_cd_put(info);
@@ -2159,7 +2158,6 @@ static int ide_cd_probe(ide_drive_t *drive)
 	g->fops = &idecd_ops;
 	g->flags |= GENHD_FL_REMOVABLE;
 	add_disk(g);
-	blk_register_filter(g);
 	return 0;
 
 out_free_cd:
diff --git a/drivers/ide/pci/hpt366.c b/drivers/ide/pci/hpt366.c
index eb107eef0db..c37ab174381 100644
--- a/drivers/ide/pci/hpt366.c
+++ b/drivers/ide/pci/hpt366.c
@@ -613,6 +613,14 @@ static int check_in_drive_list(ide_drive_t *drive, const char **list)
 	return 0;
 }
 
+static struct hpt_info *hpt3xx_get_info(struct device *dev)
+{
+	struct ide_host *host	= dev_get_drvdata(dev);
+	struct hpt_info *info	= (struct hpt_info *)host->host_priv;
+
+	return dev == host->dev[1] ? info + 1 : info;
+}
+
 /*
  * The Marvell bridge chips used on the HighPoint SATA cards do not seem
  * to support the UltraDMA modes 1, 2, and 3 as well as any MWDMA modes...
@@ -621,9 +629,7 @@ static int check_in_drive_list(ide_drive_t *drive, const char **list)
 static u8 hpt3xx_udma_filter(ide_drive_t *drive)
 {
 	ide_hwif_t *hwif	= HWIF(drive);
-	struct pci_dev *dev	= to_pci_dev(hwif->dev);
-	struct ide_host *host	= pci_get_drvdata(dev);
-	struct hpt_info *info	= host->host_priv + (hwif->dev == host->dev[1]);
+	struct hpt_info *info	= hpt3xx_get_info(hwif->dev);
 	u8 mask 		= hwif->ultra_mask;
 
 	switch (info->chip_type) {
@@ -662,9 +668,7 @@ static u8 hpt3xx_udma_filter(ide_drive_t *drive)
 static u8 hpt3xx_mdma_filter(ide_drive_t *drive)
 {
 	ide_hwif_t *hwif	= HWIF(drive);
-	struct pci_dev *dev	= to_pci_dev(hwif->dev);
-	struct ide_host *host	= pci_get_drvdata(dev);
-	struct hpt_info *info	= host->host_priv + (hwif->dev == host->dev[1]);
+	struct hpt_info *info	= hpt3xx_get_info(hwif->dev);
 
 	switch (info->chip_type) {
 	case HPT372 :
@@ -700,8 +704,7 @@ static void hpt3xx_set_mode(ide_drive_t *drive, const u8 speed)
 {
 	ide_hwif_t *hwif	= drive->hwif;
 	struct pci_dev *dev	= to_pci_dev(hwif->dev);
-	struct ide_host *host	= pci_get_drvdata(dev);
-	struct hpt_info *info	= host->host_priv + (hwif->dev == host->dev[1]);
+	struct hpt_info *info	= hpt3xx_get_info(hwif->dev);
 	struct hpt_timings *t	= info->timings;
 	u8  itr_addr		= 0x40 + (drive->dn * 4);
 	u32 old_itr		= 0;
@@ -744,8 +747,7 @@ static void hpt3xx_maskproc(ide_drive_t *drive, int mask)
 {
 	ide_hwif_t *hwif	= HWIF(drive);
 	struct pci_dev	*dev	= to_pci_dev(hwif->dev);
-	struct ide_host *host	= pci_get_drvdata(dev);
-	struct hpt_info *info	= host->host_priv + (hwif->dev == host->dev[1]);
+	struct hpt_info *info	= hpt3xx_get_info(hwif->dev);
 
 	if (drive->quirk_list) {
 		if (info->chip_type >= HPT370) {
@@ -973,8 +975,7 @@ static int __devinit hpt37x_calibrate_dpll(struct pci_dev *dev, u16 f_low, u16 f
 static unsigned int __devinit init_chipset_hpt366(struct pci_dev *dev)
 {
 	unsigned long io_base	= pci_resource_start(dev, 4);
-	struct ide_host *host	= pci_get_drvdata(dev);
-	struct hpt_info *info	= host->host_priv + (&dev->dev == host->dev[1]);
+	struct hpt_info *info	= hpt3xx_get_info(&dev->dev);
 	const char *name	= DRV_NAME;
 	u8 pci_clk,  dpll_clk	= 0;	/* PCI and DPLL clock in MHz */
 	u8 chip_type;
@@ -1217,8 +1218,7 @@ static unsigned int __devinit init_chipset_hpt366(struct pci_dev *dev)
 static u8 hpt3xx_cable_detect(ide_hwif_t *hwif)
 {
 	struct pci_dev	*dev	= to_pci_dev(hwif->dev);
-	struct ide_host *host	= pci_get_drvdata(dev);
-	struct hpt_info *info	= host->host_priv + (hwif->dev == host->dev[1]);
+	struct hpt_info *info	= hpt3xx_get_info(hwif->dev);
 	u8 chip_type		= info->chip_type;
 	u8 scr1 = 0, ata66	= hwif->channel ? 0x01 : 0x02;
 
@@ -1262,8 +1262,7 @@ static u8 hpt3xx_cable_detect(ide_hwif_t *hwif)
 static void __devinit init_hwif_hpt366(ide_hwif_t *hwif)
 {
 	struct pci_dev *dev	= to_pci_dev(hwif->dev);
-	struct ide_host *host	= pci_get_drvdata(dev);
-	struct hpt_info *info	= host->host_priv + (hwif->dev == host->dev[1]);
+	struct hpt_info *info	= hpt3xx_get_info(hwif->dev);
 	int serialize		= HPT_SERIALIZE_IO;
 	u8  chip_type		= info->chip_type;
 	u8  new_mcr, old_mcr	= 0;
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
index ecbfa1b39b7..3e9e0dcd217 100644
--- a/drivers/media/video/Kconfig
+++ b/drivers/media/video/Kconfig
@@ -968,7 +968,7 @@ config VIDEO_PXA27x
 
 config VIDEO_SH_MOBILE_CEU
 	tristate "SuperH Mobile CEU Interface driver"
-	depends on VIDEO_DEV
+	depends on VIDEO_DEV && HAS_DMA
 	select SOC_CAMERA
 	select VIDEOBUF_DMA_CONTIG
 	---help---
diff --git a/drivers/memstick/core/memstick.c b/drivers/memstick/core/memstick.c
index a38005008a2..cea46906408 100644
--- a/drivers/memstick/core/memstick.c
+++ b/drivers/memstick/core/memstick.c
@@ -185,7 +185,7 @@ static void memstick_free(struct device *dev)
 }
 
 static struct class memstick_host_class = {
-	.name       = "memstick_host",
+	.name        = "memstick_host",
 	.dev_release = memstick_free
 };
 
@@ -264,7 +264,7 @@ EXPORT_SYMBOL(memstick_new_req);
  * @sg - TPC argument
  */
 void memstick_init_req_sg(struct memstick_request *mrq, unsigned char tpc,
-			  struct scatterlist *sg)
+			  const struct scatterlist *sg)
 {
 	mrq->tpc = tpc;
 	if (tpc & 8)
@@ -294,7 +294,7 @@ EXPORT_SYMBOL(memstick_init_req_sg);
  * user supplied buffer.
  */
 void memstick_init_req(struct memstick_request *mrq, unsigned char tpc,
-		       void *buf, size_t length)
+		       const void *buf, size_t length)
 {
 	mrq->tpc = tpc;
 	if (tpc & 8)
@@ -439,7 +439,7 @@ static void memstick_check(struct work_struct *work)
 	if (!host->card) {
 		if (memstick_power_on(host))
 			goto out_power_off;
-	} else
+	} else if (host->card->stop)
 		host->card->stop(host->card);
 
 	card = memstick_alloc_card(host);
@@ -458,7 +458,7 @@ static void memstick_check(struct work_struct *work)
 			    || !(host->card->check(host->card))) {
 				device_unregister(&host->card->dev);
 				host->card = NULL;
-			} else
+			} else if (host->card->start)
 				host->card->start(host->card);
 		}
 
diff --git a/drivers/memstick/core/mspro_block.c b/drivers/memstick/core/mspro_block.c
index 44b1817f2f2..d2d2318dafa 100644
--- a/drivers/memstick/core/mspro_block.c
+++ b/drivers/memstick/core/mspro_block.c
@@ -30,6 +30,8 @@ module_param(major, int, 0644);
 #define MSPRO_BLOCK_SIGNATURE        0xa5c3
 #define MSPRO_BLOCK_MAX_ATTRIBUTES   41
 
+#define MSPRO_BLOCK_PART_SHIFT 3
+
 enum {
 	MSPRO_BLOCK_ID_SYSINFO         = 0x10,
 	MSPRO_BLOCK_ID_MODELNAME       = 0x15,
@@ -195,7 +197,7 @@ static int mspro_block_bd_open(struct inode *inode, struct file *filp)
 static int mspro_block_disk_release(struct gendisk *disk)
 {
 	struct mspro_block_data *msb = disk->private_data;
-	int disk_id = disk->first_minor >> MEMSTICK_PART_SHIFT;
+	int disk_id = disk->first_minor >> MSPRO_BLOCK_PART_SHIFT;
 
 	mutex_lock(&mspro_block_disk_lock);
 
@@ -877,6 +879,7 @@ static int mspro_block_switch_interface(struct memstick_dev *card)
 	struct mspro_block_data *msb = memstick_get_drvdata(card);
 	int rc = 0;
 
+try_again:
 	if (msb->caps & MEMSTICK_CAP_PAR4)
 		rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR4);
 	else
@@ -930,6 +933,18 @@ static int mspro_block_switch_interface(struct memstick_dev *card)
 		rc = memstick_set_rw_addr(card);
 		if (!rc)
 			rc = mspro_block_set_interface(card, msb->system);
+
+		if (!rc) {
+			msleep(150);
+			rc = mspro_block_wait_for_ced(card);
+			if (rc)
+				return rc;
+
+			if (msb->caps & MEMSTICK_CAP_PAR8) {
+				msb->caps &= ~MEMSTICK_CAP_PAR8;
+				goto try_again;
+			}
+		}
 	}
 	return rc;
 }
@@ -1117,14 +1132,16 @@ static int mspro_block_init_card(struct memstick_dev *card)
 		return -EIO;
 
 	msb->caps = host->caps;
-	rc = mspro_block_switch_interface(card);
+
+	msleep(150);
+	rc = mspro_block_wait_for_ced(card);
 	if (rc)
 		return rc;
 
-	msleep(200);
-	rc = mspro_block_wait_for_ced(card);
+	rc = mspro_block_switch_interface(card);
 	if (rc)
 		return rc;
+
 	dev_dbg(&card->dev, "card activated\n");
 	if (msb->system != MEMSTICK_SYS_SERIAL)
 		msb->caps |= MEMSTICK_CAP_AUTO_GET_INT;
@@ -1192,12 +1209,12 @@ static int mspro_block_init_disk(struct memstick_dev *card)
 	if (rc)
 		return rc;
 
-	if ((disk_id << MEMSTICK_PART_SHIFT) > 255) {
+	if ((disk_id << MSPRO_BLOCK_PART_SHIFT) > 255) {
 		rc = -ENOSPC;
 		goto out_release_id;
 	}
 
-	msb->disk = alloc_disk(1 << MEMSTICK_PART_SHIFT);
+	msb->disk = alloc_disk(1 << MSPRO_BLOCK_PART_SHIFT);
 	if (!msb->disk) {
 		rc = -ENOMEM;
 		goto out_release_id;
@@ -1220,7 +1237,7 @@ static int mspro_block_init_disk(struct memstick_dev *card)
 				   MSPRO_BLOCK_MAX_PAGES * msb->page_size);
 
 	msb->disk->major = major;
-	msb->disk->first_minor = disk_id << MEMSTICK_PART_SHIFT;
+	msb->disk->first_minor = disk_id << MSPRO_BLOCK_PART_SHIFT;
 	msb->disk->fops = &ms_block_bdops;
 	msb->usage_count = 1;
 	msb->disk->private_data = msb;
@@ -1416,7 +1433,7 @@ out_unlock:
 
 static struct memstick_device_id mspro_block_id_tbl[] = {
 	{MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_PRO, MEMSTICK_CATEGORY_STORAGE_DUO,
-	 MEMSTICK_CLASS_GENERIC_DUO},
+	 MEMSTICK_CLASS_DUO},
 	{}
 };
 
diff --git a/drivers/memstick/host/jmb38x_ms.c b/drivers/memstick/host/jmb38x_ms.c
index 3485c63d20b..2fb95a5b72e 100644
--- a/drivers/memstick/host/jmb38x_ms.c
+++ b/drivers/memstick/host/jmb38x_ms.c
@@ -81,6 +81,8 @@ struct jmb38x_ms {
 #define TPC_CODE_SZ_MASK       0x00000700
 #define TPC_DATA_SZ_MASK       0x00000007
 
+#define HOST_CONTROL_TDELAY_EN 0x00040000
+#define HOST_CONTROL_HW_OC_P   0x00010000
 #define HOST_CONTROL_RESET_REQ 0x00008000
 #define HOST_CONTROL_REI       0x00004000
 #define HOST_CONTROL_LED       0x00000400
@@ -88,6 +90,7 @@ struct jmb38x_ms {
 #define HOST_CONTROL_RESET     0x00000100
 #define HOST_CONTROL_POWER_EN  0x00000080
 #define HOST_CONTROL_CLOCK_EN  0x00000040
+#define HOST_CONTROL_REO       0x00000008
 #define HOST_CONTROL_IF_SHIFT  4
 
 #define HOST_CONTROL_IF_SERIAL 0x0
@@ -133,11 +136,15 @@ struct jmb38x_ms {
 #define PAD_PU_PD_ON_MS_SOCK1 0x0f0f0000
 
 #define CLOCK_CONTROL_40MHZ   0x00000001
-#define CLOCK_CONTROL_50MHZ   0x00000002
+#define CLOCK_CONTROL_50MHZ   0x0000000a
 #define CLOCK_CONTROL_60MHZ   0x00000008
 #define CLOCK_CONTROL_62_5MHZ 0x0000000c
 #define CLOCK_CONTROL_OFF     0x00000000
 
+#define PCI_CTL_CLOCK_DLY_ADDR   0x000000b0
+#define PCI_CTL_CLOCK_DLY_MASK_A 0x00000f00
+#define PCI_CTL_CLOCK_DLY_MASK_B 0x0000f000
+
 enum {
 	CMD_READY    = 0x01,
 	FIFO_READY   = 0x02,
@@ -367,8 +374,7 @@ static int jmb38x_ms_issue_cmd(struct memstick_host *msh)
 		return host->req->error;
 	}
 
-	dev_dbg(&msh->dev, "control %08x\n",
-		readl(host->addr + HOST_CONTROL));
+	dev_dbg(&msh->dev, "control %08x\n", readl(host->addr + HOST_CONTROL));
 	dev_dbg(&msh->dev, "status %08x\n", readl(host->addr + INT_STATUS));
 	dev_dbg(&msh->dev, "hstatus %08x\n", readl(host->addr + STATUS));
 
@@ -637,7 +643,7 @@ static int jmb38x_ms_reset(struct jmb38x_ms_host *host)
 		ndelay(20);
 	}
 	dev_dbg(&host->chip->pdev->dev, "reset_req timeout\n");
-	return -EIO;
+	/* return -EIO; */
 
 reset_next:
 	writel(HOST_CONTROL_RESET | HOST_CONTROL_CLOCK_EN
@@ -680,7 +686,9 @@ static int jmb38x_ms_set_param(struct memstick_host *msh,
 
 			host_ctl = 7;
 			host_ctl |= HOST_CONTROL_POWER_EN
-				 | HOST_CONTROL_CLOCK_EN;
+				    | HOST_CONTROL_CLOCK_EN
+				    | HOST_CONTROL_HW_OC_P
+				    | HOST_CONTROL_TDELAY_EN;
 			writel(host_ctl, host->addr + HOST_CONTROL);
 
 			writel(host->id ? PAD_PU_PD_ON_MS_SOCK1
@@ -704,33 +712,40 @@ static int jmb38x_ms_set_param(struct memstick_host *msh,
 		break;
 	case MEMSTICK_INTERFACE:
 		host_ctl &= ~(3 << HOST_CONTROL_IF_SHIFT);
+		pci_read_config_dword(host->chip->pdev,
+				      PCI_CTL_CLOCK_DLY_ADDR,
+				      &clock_delay);
+		clock_delay &= host->id ? ~PCI_CTL_CLOCK_DLY_MASK_B
+					: ~PCI_CTL_CLOCK_DLY_MASK_A;
 
 		if (value == MEMSTICK_SERIAL) {
 			host_ctl &= ~HOST_CONTROL_FAST_CLK;
+			host_ctl &= ~HOST_CONTROL_REO;
 			host_ctl |= HOST_CONTROL_IF_SERIAL
 				    << HOST_CONTROL_IF_SHIFT;
 			host_ctl |= HOST_CONTROL_REI;
 			clock_ctl = CLOCK_CONTROL_40MHZ;
-			clock_delay = 0;
 		} else if (value == MEMSTICK_PAR4) {
-			host_ctl |= HOST_CONTROL_FAST_CLK;
+			host_ctl |= HOST_CONTROL_FAST_CLK | HOST_CONTROL_REO;
 			host_ctl |= HOST_CONTROL_IF_PAR4
 				    << HOST_CONTROL_IF_SHIFT;
 			host_ctl &= ~HOST_CONTROL_REI;
 			clock_ctl = CLOCK_CONTROL_40MHZ;
-			clock_delay = 4;
+			clock_delay |= host->id ? (4 << 12) : (4 << 8);
 		} else if (value == MEMSTICK_PAR8) {
 			host_ctl |= HOST_CONTROL_FAST_CLK;
 			host_ctl |= HOST_CONTROL_IF_PAR8
 				    << HOST_CONTROL_IF_SHIFT;
-			host_ctl &= ~HOST_CONTROL_REI;
-			clock_ctl = CLOCK_CONTROL_60MHZ;
-			clock_delay = 0;
+			host_ctl &= ~(HOST_CONTROL_REI | HOST_CONTROL_REO);
+			clock_ctl = CLOCK_CONTROL_50MHZ;
 		} else
 			return -EINVAL;
+
 		writel(host_ctl, host->addr + HOST_CONTROL);
 		writel(clock_ctl, host->addr + CLOCK_CONTROL);
-		writel(clock_delay, host->addr + CLOCK_DELAY);
+		pci_write_config_dword(host->chip->pdev,
+				       PCI_CTL_CLOCK_DLY_ADDR,
+				       clock_delay);
 		break;
 	};
 	return 0;
diff --git a/drivers/misc/sgi-gru/grufile.c b/drivers/misc/sgi-gru/grufile.c
index 23c91f5f6b6..d61cee796ef 100644
--- a/drivers/misc/sgi-gru/grufile.c
+++ b/drivers/misc/sgi-gru/grufile.c
@@ -445,6 +445,9 @@ static void __exit gru_exit(void)
 	int order = get_order(sizeof(struct gru_state) *
 			      GRU_CHIPLETS_PER_BLADE);
 
+	if (!IS_UV())
+		return;
+
 	for (i = 0; i < GRU_CHIPLETS_PER_BLADE; i++)
 		free_irq(IRQ_GRU + i, NULL);
 
diff --git a/drivers/net/niu.c b/drivers/net/niu.c
index e4765b713ab..e3be81eba8a 100644
--- a/drivers/net/niu.c
+++ b/drivers/net/niu.c
@@ -5984,6 +5984,56 @@ static void niu_netif_start(struct niu *np)
 	niu_enable_interrupts(np, 1);
 }
 
+static void niu_reset_buffers(struct niu *np)
+{
+	int i, j, k, err;
+
+	if (np->rx_rings) {
+		for (i = 0; i < np->num_rx_rings; i++) {
+			struct rx_ring_info *rp = &np->rx_rings[i];
+
+			for (j = 0, k = 0; j < MAX_RBR_RING_SIZE; j++) {
+				struct page *page;
+
+				page = rp->rxhash[j];
+				while (page) {
+					struct page *next =
+						(struct page *) page->mapping;
+					u64 base = page->index;
+					base = base >> RBR_DESCR_ADDR_SHIFT;
+					rp->rbr[k++] = cpu_to_le32(base);
+					page = next;
+				}
+			}
+			for (; k < MAX_RBR_RING_SIZE; k++) {
+				err = niu_rbr_add_page(np, rp, GFP_ATOMIC, k);
+				if (unlikely(err))
+					break;
+			}
+
+			rp->rbr_index = rp->rbr_table_size - 1;
+			rp->rcr_index = 0;
+			rp->rbr_pending = 0;
+			rp->rbr_refill_pending = 0;
+		}
+	}
+	if (np->tx_rings) {
+		for (i = 0; i < np->num_tx_rings; i++) {
+			struct tx_ring_info *rp = &np->tx_rings[i];
+
+			for (j = 0; j < MAX_TX_RING_SIZE; j++) {
+				if (rp->tx_buffs[j].skb)
+					(void) release_tx_packet(np, rp, j);
+			}
+
+			rp->pending = MAX_TX_RING_SIZE;
+			rp->prod = 0;
+			rp->cons = 0;
+			rp->wrap_bit = 0;
+		}
+	}
+}
+
 static void niu_reset_task(struct work_struct *work)
 {
 	struct niu *np = container_of(work, struct niu, reset_task);
@@ -6006,6 +6056,12 @@ static void niu_reset_task(struct work_struct *work)
 
 	niu_stop_hw(np);
 
+	spin_unlock_irqrestore(&np->lock, flags);
+
+	niu_reset_buffers(np);
+
+	spin_lock_irqsave(&np->lock, flags);
+
 	err = niu_init_hw(np);
 	if (!err) {
 		np->timer.expires = jiffies + HZ;
diff --git a/drivers/net/wireless/ath9k/beacon.c b/drivers/net/wireless/ath9k/beacon.c
index caf569401a3..00a0eaa0886 100644
--- a/drivers/net/wireless/ath9k/beacon.c
+++ b/drivers/net/wireless/ath9k/beacon.c
@@ -209,6 +209,7 @@ static struct ath_buf *ath_beacon_generate(struct ath_softc *sc, int if_id)
 	unsigned int curlen;
 	struct ath_txq *cabq;
 	struct ath_txq *mcastq;
+	struct ieee80211_tx_info *info;
 	avp = sc->sc_vaps[if_id];
 
 	mcastq = &avp->av_mcastq;
@@ -232,6 +233,18 @@ static struct ath_buf *ath_beacon_generate(struct ath_softc *sc, int if_id)
 	 */
 	curlen = skb->len;
 
+	info = IEEE80211_SKB_CB(skb);
+	if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
+		/*
+		 * TODO: make sure the seq# gets assigned properly (vs. other
+		 * TX frames)
+		 */
+		struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+		sc->seq_no += 0x10;
+		hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
+		hdr->seq_ctrl |= cpu_to_le16(sc->seq_no);
+	}
+
 	/* XXX: spin_lock_bh should not be used here, but sparse bitches
 	 * otherwise. We should fix sparse :) */
 	spin_lock_bh(&mcastq->axq_lock);
diff --git a/drivers/net/wireless/ath9k/core.h b/drivers/net/wireless/ath9k/core.h
index 673b3d81133..4ee695b76b8 100644
--- a/drivers/net/wireless/ath9k/core.h
+++ b/drivers/net/wireless/ath9k/core.h
@@ -992,6 +992,7 @@ struct ath_softc {
 	u32 sc_txintrperiod;	/* tx interrupt batching */
 	int sc_haltype2q[ATH9K_WME_AC_VO+1]; /* HAL WME	AC -> h/w qnum */
 	u32 sc_ant_tx[8];	/* recent tx frames/antenna */
+	u16 seq_no; /* TX sequence number */
 
 	/* Beacon */
 	struct ath9k_tx_queue_info sc_beacon_qi;
diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c
index c5107f269f2..99badf1404c 100644
--- a/drivers/net/wireless/ath9k/main.c
+++ b/drivers/net/wireless/ath9k/main.c
@@ -369,6 +369,20 @@ static int ath9k_tx(struct ieee80211_hw *hw,
 {
 	struct ath_softc *sc = hw->priv;
 	int hdrlen, padsize;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+
+	/*
+	 * As a temporary workaround, assign seq# here; this will likely need
+	 * to be cleaned up to work better with Beacon transmission and virtual
+	 * BSSes.
+	 */
+	if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
+		struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+		if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
+			sc->seq_no += 0x10;
+		hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
+		hdr->seq_ctrl |= cpu_to_le16(sc->seq_no);
+	}
 
 	/* Add the padding after the header if this is not already done */
 	hdrlen = ieee80211_get_hdrlen_from_skb(skb);
diff --git a/drivers/pci/hotplug/fakephp.c b/drivers/pci/hotplug/fakephp.c
index 40337a06c18..146ca9cd156 100644
--- a/drivers/pci/hotplug/fakephp.c
+++ b/drivers/pci/hotplug/fakephp.c
@@ -320,15 +320,15 @@ static int disable_slot(struct hotplug_slot *slot)
 			return -ENODEV;
 		}
 
+		/* remove the device from the pci core */
+		pci_remove_bus_device(dev);
+
 		/* queue work item to blow away this sysfs entry and other
 		 * parts.
 		 */
 		INIT_WORK(&dslot->remove_work, remove_slot_worker);
 		queue_work(dummyphp_wq, &dslot->remove_work);
 
-		/* blow away this sysfs entry and other parts. */
-		remove_slot(dslot);
-
 		pci_dev_put(dev);
 	}
 	return 0;
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index ab31f5ba665..9d934ddee95 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -258,7 +258,7 @@ static int pcie_poll_cmd(struct controller *ctrl)
 			return 1;
 		}
 	}
-	while (timeout > 1000) {
+	while (timeout > 0) {
 		msleep(10);
 		timeout -= 10;
 		if (!pciehp_readw(ctrl, SLOTSTATUS, &slot_status)) {
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index eaba6ecc2ad..6c4c1c3c50e 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -2348,11 +2348,34 @@ static void __init iommu_exit_mempool(void)
 
 }
 
+static int blacklist_iommu(const struct dmi_system_id *id)
+{
+	printk(KERN_INFO "%s detected; disabling IOMMU\n",
+	       id->ident);
+	dmar_disabled = 1;
+	return 0;
+}
+
+static struct dmi_system_id __initdata intel_iommu_dmi_table[] = {
+	{	/* Some DG33BU BIOS revisions advertised non-existent VT-d */
+		.callback = blacklist_iommu,
+		.ident = "Intel DG33BU",
+		{	DMI_MATCH(DMI_BOARD_VENDOR, "Intel Corporation"),
+			DMI_MATCH(DMI_BOARD_NAME, "DG33BU"),
+		}
+	},
+	{ }
+};
+
+
 void __init detect_intel_iommu(void)
 {
 	if (swiotlb || no_iommu || iommu_detected || dmar_disabled)
 		return;
 	if (early_dmar_detect()) {
+		dmi_check_system(intel_iommu_dmi_table);
+		if (dmar_disabled)
+			return;
 		iommu_detected = 1;
 	}
 }
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index cce2f4cb1fb..36698e57b97 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -304,6 +304,9 @@ static int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
 		} else {
 			res->start = l64;
 			res->end = l64 + sz64;
+			printk(KERN_DEBUG "PCI: %s reg %x 64bit mmio: [%llx, %llx]\n",
+				pci_name(dev), pos, (unsigned long long)res->start,
+				(unsigned long long)res->end);
 		}
 	} else {
 		sz = pci_size(l, sz, mask);
@@ -313,6 +316,9 @@ static int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
 
 		res->start = l;
 		res->end = l + sz;
+		printk(KERN_DEBUG "PCI: %s reg %x %s: [%llx, %llx]\n", pci_name(dev),
+			pos, (res->flags & IORESOURCE_IO) ? "io port":"32bit mmio",
+			(unsigned long long)res->start, (unsigned long long)res->end);
 	}
 
  out:
@@ -383,7 +389,9 @@ void __devinit pci_read_bridge_bases(struct pci_bus *child)
 			res->start = base;
 		if (!res->end)
 			res->end = limit + 0xfff;
-		printk(KERN_INFO "PCI: bridge %s io port: [%llx, %llx]\n", pci_name(dev), res->start, res->end);
+		printk(KERN_DEBUG "PCI: bridge %s io port: [%llx, %llx]\n",
+			pci_name(dev), (unsigned long long) res->start,
+			(unsigned long long) res->end);
 	}
 
 	res = child->resource[1];
@@ -395,7 +403,9 @@ void __devinit pci_read_bridge_bases(struct pci_bus *child)
 		res->flags = (mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) | IORESOURCE_MEM;
 		res->start = base;
 		res->end = limit + 0xfffff;
-		printk(KERN_INFO "PCI: bridge %s 32bit mmio: [%llx, %llx]\n", pci_name(dev), res->start, res->end);
+		printk(KERN_DEBUG "PCI: bridge %s 32bit mmio: [%llx, %llx]\n",
+			pci_name(dev), (unsigned long long) res->start,
+			(unsigned long long) res->end);
 	}
 
 	res = child->resource[2];
@@ -431,7 +441,9 @@ void __devinit pci_read_bridge_bases(struct pci_bus *child)
 		res->flags = (mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) | IORESOURCE_MEM | IORESOURCE_PREFETCH;
 		res->start = base;
 		res->end = limit + 0xfffff;
-		printk(KERN_INFO "PCI: bridge %s %sbit mmio pref: [%llx, %llx]\n", pci_name(dev), (res->flags & PCI_PREF_RANGE_TYPE_64)?"64":"32",res->start, res->end);
+		printk(KERN_DEBUG "PCI: bridge %s %sbit mmio pref: [%llx, %llx]\n",
+			pci_name(dev), (res->flags & PCI_PREF_RANGE_TYPE_64) ? "64" : "32",
+			(unsigned long long) res->start, (unsigned long long) res->end);
 	}
 }
 
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 1aad599816f..3abbfad9dda 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -540,7 +540,11 @@ static void pci_bus_dump_res(struct pci_bus *bus)
                 if (!res)
                         continue;
 
-		printk(KERN_INFO "bus: %02x index %x %s: [%llx, %llx]\n", bus->number, i, (res->flags & IORESOURCE_IO)? "io port":"mmio", res->start, res->end);
+		printk(KERN_INFO "bus: %02x index %x %s: [%llx, %llx]\n",
+			bus->number, i,
+			(res->flags & IORESOURCE_IO) ? "io port" : "mmio",
+			(unsigned long long) res->start,
+			(unsigned long long) res->end);
         }
 }
 
diff --git a/drivers/pcmcia/soc_common.c b/drivers/pcmcia/soc_common.c
index c48f3f69bda..da397215322 100644
--- a/drivers/pcmcia/soc_common.c
+++ b/drivers/pcmcia/soc_common.c
@@ -748,7 +748,9 @@ int soc_common_drv_pcmcia_probe(struct device *dev, struct pcmcia_low_level *ops
 
 		add_timer(&skt->poll_timer);
 
-		device_create_file(&skt->socket.dev, &dev_attr_status);
+		ret = device_create_file(&skt->socket.dev, &dev_attr_status);
+		if (ret)
+			goto out_err_8;
 	}
 
 	dev_set_drvdata(dev, sinfo);
@@ -758,6 +760,8 @@ int soc_common_drv_pcmcia_probe(struct device *dev, struct pcmcia_low_level *ops
 	do {
 		skt = &sinfo->skt[i];
 
+		device_remove_file(&skt->socket.dev, &dev_attr_status);
+ out_err_8:
 		del_timer_sync(&skt->poll_timer);
 		pcmcia_unregister_socket(&skt->socket);
 
diff --git a/drivers/s390/scsi/zfcp_ccw.c b/drivers/s390/scsi/zfcp_ccw.c
index 391dd29749f..51b6a05f4d1 100644
--- a/drivers/s390/scsi/zfcp_ccw.c
+++ b/drivers/s390/scsi/zfcp_ccw.c
@@ -152,10 +152,8 @@ static int zfcp_ccw_set_offline(struct ccw_device *ccw_device)
  */
 static int zfcp_ccw_notify(struct ccw_device *ccw_device, int event)
 {
-	struct zfcp_adapter *adapter;
+	struct zfcp_adapter *adapter = dev_get_drvdata(&ccw_device->dev);
 
-	down(&zfcp_data.config_sema);
-	adapter = dev_get_drvdata(&ccw_device->dev);
 	switch (event) {
 	case CIO_GONE:
 		dev_warn(&adapter->ccw_device->dev, "device gone\n");
@@ -174,8 +172,6 @@ static int zfcp_ccw_notify(struct ccw_device *ccw_device, int event)
 					89, NULL);
 		break;
 	}
-	zfcp_erp_wait(adapter);
-	up(&zfcp_data.config_sema);
 	return 1;
 }
 
diff --git a/drivers/s390/scsi/zfcp_fc.c b/drivers/s390/scsi/zfcp_fc.c
index e984469bb98..56196c98c07 100644
--- a/drivers/s390/scsi/zfcp_fc.c
+++ b/drivers/s390/scsi/zfcp_fc.c
@@ -39,18 +39,6 @@ struct zfcp_gpn_ft {
 	struct scatterlist sg_resp[ZFCP_GPN_FT_BUFFERS];
 };
 
-static struct zfcp_port *zfcp_get_port_by_did(struct zfcp_adapter *adapter,
-					      u32 d_id)
-{
-	struct zfcp_port *port;
-
-	list_for_each_entry(port, &adapter->port_list_head, list)
-		if ((port->d_id == d_id) &&
-		    !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status))
-			return port;
-	return NULL;
-}
-
 static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range,
 				   struct fcp_rscn_element *elem)
 {
@@ -341,12 +329,13 @@ void zfcp_test_link(struct zfcp_port *port)
 
 	zfcp_port_get(port);
 	retval = zfcp_fc_adisc(port);
-	if (retval == 0 || retval == -EBUSY)
+	if (retval == 0)
 		return;
 
 	/* send of ADISC was not possible */
 	zfcp_port_put(port);
-	zfcp_erp_port_forced_reopen(port, 0, 65, NULL);
+	if (retval != -EBUSY)
+		zfcp_erp_port_forced_reopen(port, 0, 65, NULL);
 }
 
 static int zfcp_scan_get_nameserver(struct zfcp_adapter *adapter)
@@ -363,7 +352,6 @@ static int zfcp_scan_get_nameserver(struct zfcp_adapter *adapter)
 		if (ret)
 			return ret;
 		zfcp_erp_wait(adapter);
-		zfcp_port_put(adapter->nameserver_port);
 	}
 	return !atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
 				  &adapter->nameserver_port->status);
@@ -475,7 +463,7 @@ static int zfcp_scan_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft)
 	struct zfcp_adapter *adapter = ct->port->adapter;
 	struct zfcp_port *port, *tmp;
 	u32 d_id;
-	int ret = 0, x;
+	int ret = 0, x, last = 0;
 
 	if (ct->status)
 		return -EIO;
@@ -492,19 +480,24 @@ static int zfcp_scan_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft)
 	down(&zfcp_data.config_sema);
 
 	/* first entry is the header */
-	for (x = 1; x < ZFCP_GPN_FT_MAX_ENTRIES; x++) {
+	for (x = 1; x < ZFCP_GPN_FT_MAX_ENTRIES && !last; x++) {
 		if (x % (ZFCP_GPN_FT_ENTRIES + 1))
 			acc++;
 		else
 			acc = sg_virt(++sg);
 
+		last = acc->control & 0x80;
 		d_id = acc->port_id[0] << 16 | acc->port_id[1] << 8 |
 		       acc->port_id[2];
 
 		/* skip the adapter's port and known remote ports */
-		if (acc->wwpn == fc_host_port_name(adapter->scsi_host) ||
-		     zfcp_get_port_by_did(adapter, d_id))
+		if (acc->wwpn == fc_host_port_name(adapter->scsi_host))
+			continue;
+		port = zfcp_get_port_by_wwpn(adapter, acc->wwpn);
+		if (port) {
+			zfcp_port_get(port);
 			continue;
+		}
 
 		port = zfcp_port_enqueue(adapter, acc->wwpn,
 					 ZFCP_STATUS_PORT_DID_DID |
@@ -513,8 +506,6 @@ static int zfcp_scan_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft)
 			ret = PTR_ERR(port);
 		else
 			zfcp_erp_port_reopen(port, 0, 149, NULL);
-		if (acc->control & 0x80) /* last entry */
-			break;
 	}
 
 	zfcp_erp_wait(adapter);
diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c
index 19c1ca91387..49dbeb754e5 100644
--- a/drivers/s390/scsi/zfcp_fsf.c
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -710,10 +710,10 @@ static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
 
 static int zfcp_fsf_sbal_check(struct zfcp_qdio_queue *queue)
 {
-	spin_lock(&queue->lock);
+	spin_lock_bh(&queue->lock);
 	if (atomic_read(&queue->count))
 		return 1;
-	spin_unlock(&queue->lock);
+	spin_unlock_bh(&queue->lock);
 	return 0;
 }
 
@@ -722,13 +722,13 @@ static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
 	long ret;
 	struct zfcp_qdio_queue *req_q = &adapter->req_q;
 
-	spin_unlock(&req_q->lock);
+	spin_unlock_bh(&req_q->lock);
 	ret = wait_event_interruptible_timeout(adapter->request_wq,
 					zfcp_fsf_sbal_check(req_q), 5 * HZ);
 	if (ret > 0)
 		return 0;
 
-	spin_lock(&req_q->lock);
+	spin_lock_bh(&req_q->lock);
 	return -EIO;
 }
 
@@ -870,14 +870,14 @@ int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
 	volatile struct qdio_buffer_element *sbale;
 	int retval = -EIO;
 
-	spin_lock(&adapter->req_q.lock);
+	spin_lock_bh(&adapter->req_q.lock);
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
 				  ZFCP_REQ_NO_QTCB,
 				  adapter->pool.fsf_req_status_read);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
@@ -910,7 +910,7 @@ failed_buf:
 	zfcp_fsf_req_free(req);
 	zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
 out:
-	spin_unlock(&adapter->req_q.lock);
+	spin_unlock_bh(&adapter->req_q.lock);
 	return retval;
 }
 
@@ -988,7 +988,7 @@ struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
 		goto out;
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
 				  req_flags, adapter->pool.fsf_req_abort);
-	if (unlikely(IS_ERR(req)))
+	if (IS_ERR(req))
 		goto out;
 
 	if (unlikely(!(atomic_read(&unit->status) &
@@ -1106,13 +1106,13 @@ int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
 	struct zfcp_fsf_req *req;
 	int ret = -EIO;
 
-	spin_lock(&adapter->req_q.lock);
+	spin_lock_bh(&adapter->req_q.lock);
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
 				  ZFCP_REQ_AUTO_CLEANUP, pool);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		ret = PTR_ERR(req);
 		goto out;
 	}
@@ -1148,7 +1148,7 @@ failed_send:
 	if (erp_action)
 		erp_action->fsf_req = NULL;
 out:
-	spin_unlock(&adapter->req_q.lock);
+	spin_unlock_bh(&adapter->req_q.lock);
 	return ret;
 }
 
@@ -1223,7 +1223,7 @@ int zfcp_fsf_send_els(struct zfcp_send_els *els)
 		goto out;
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
 				  ZFCP_REQ_AUTO_CLEANUP, NULL);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		ret = PTR_ERR(req);
 		goto out;
 	}
@@ -1263,14 +1263,14 @@ int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
 	struct zfcp_adapter *adapter = erp_action->adapter;
 	int retval = -EIO;
 
-	spin_lock(&adapter->req_q.lock);
+	spin_lock_bh(&adapter->req_q.lock);
 	if (!atomic_read(&adapter->req_q.count))
 		goto out;
 	req = zfcp_fsf_req_create(adapter,
 				  FSF_QTCB_EXCHANGE_CONFIG_DATA,
 				  ZFCP_REQ_AUTO_CLEANUP,
 				  adapter->pool.fsf_req_erp);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
@@ -1295,7 +1295,7 @@ int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
 		erp_action->fsf_req = NULL;
 	}
 out:
-	spin_unlock(&adapter->req_q.lock);
+	spin_unlock_bh(&adapter->req_q.lock);
 	return retval;
 }
 
@@ -1306,13 +1306,13 @@ int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
 	struct zfcp_fsf_req *req = NULL;
 	int retval = -EIO;
 
-	spin_lock(&adapter->req_q.lock);
+	spin_lock_bh(&adapter->req_q.lock);
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
 				  0, NULL);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
@@ -1334,7 +1334,7 @@ int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
 	zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
 	retval = zfcp_fsf_req_send(req);
 out:
-	spin_unlock(&adapter->req_q.lock);
+	spin_unlock_bh(&adapter->req_q.lock);
 	if (!retval)
 		wait_event(req->completion_wq,
 			   req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
@@ -1359,13 +1359,13 @@ int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
 	if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
 		return -EOPNOTSUPP;
 
-	spin_lock(&adapter->req_q.lock);
+	spin_lock_bh(&adapter->req_q.lock);
 	if (!atomic_read(&adapter->req_q.count))
 		goto out;
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
 				  ZFCP_REQ_AUTO_CLEANUP,
 				  adapter->pool.fsf_req_erp);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
@@ -1385,7 +1385,7 @@ int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
 		erp_action->fsf_req = NULL;
 	}
 out:
-	spin_unlock(&adapter->req_q.lock);
+	spin_unlock_bh(&adapter->req_q.lock);
 	return retval;
 }
 
@@ -1405,13 +1405,13 @@ int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
 	if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
 		return -EOPNOTSUPP;
 
-	spin_lock(&adapter->req_q.lock);
+	spin_lock_bh(&adapter->req_q.lock);
 	if (!atomic_read(&adapter->req_q.count))
 		goto out;
 
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0,
 				  NULL);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
@@ -1427,7 +1427,7 @@ int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
 	zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
 	retval = zfcp_fsf_req_send(req);
 out:
-	spin_unlock(&adapter->req_q.lock);
+	spin_unlock_bh(&adapter->req_q.lock);
 	if (!retval)
 		wait_event(req->completion_wq,
 			   req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
@@ -1531,7 +1531,7 @@ int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
 	struct zfcp_fsf_req *req;
 	int retval = -EIO;
 
-	spin_lock(&adapter->req_q.lock);
+	spin_lock_bh(&adapter->req_q.lock);
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 
@@ -1539,7 +1539,7 @@ int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
 				  FSF_QTCB_OPEN_PORT_WITH_DID,
 				  ZFCP_REQ_AUTO_CLEANUP,
 				  adapter->pool.fsf_req_erp);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
@@ -1562,7 +1562,7 @@ int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
 		erp_action->fsf_req = NULL;
 	}
 out:
-	spin_unlock(&adapter->req_q.lock);
+	spin_unlock_bh(&adapter->req_q.lock);
 	return retval;
 }
 
@@ -1603,14 +1603,14 @@ int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
 	struct zfcp_fsf_req *req;
 	int retval = -EIO;
 
-	spin_lock(&adapter->req_q.lock);
+	spin_lock_bh(&adapter->req_q.lock);
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
 				  ZFCP_REQ_AUTO_CLEANUP,
 				  adapter->pool.fsf_req_erp);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
@@ -1633,7 +1633,7 @@ int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
 		erp_action->fsf_req = NULL;
 	}
 out:
-	spin_unlock(&adapter->req_q.lock);
+	spin_unlock_bh(&adapter->req_q.lock);
 	return retval;
 }
 
@@ -1700,14 +1700,14 @@ int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
 	struct zfcp_fsf_req *req;
 	int retval = -EIO;
 
-	spin_lock(&adapter->req_q.lock);
+	spin_lock_bh(&adapter->req_q.lock);
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
 				  ZFCP_REQ_AUTO_CLEANUP,
 				  adapter->pool.fsf_req_erp);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
@@ -1731,7 +1731,7 @@ int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
 		erp_action->fsf_req = NULL;
 	}
 out:
-	spin_unlock(&adapter->req_q.lock);
+	spin_unlock_bh(&adapter->req_q.lock);
 	return retval;
 }
 
@@ -1875,14 +1875,14 @@ int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
 	struct zfcp_fsf_req *req;
 	int retval = -EIO;
 
-	spin_lock(&adapter->req_q.lock);
+	spin_lock_bh(&adapter->req_q.lock);
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
 				  ZFCP_REQ_AUTO_CLEANUP,
 				  adapter->pool.fsf_req_erp);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
@@ -1910,7 +1910,7 @@ int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
 		erp_action->fsf_req = NULL;
 	}
 out:
-	spin_unlock(&adapter->req_q.lock);
+	spin_unlock_bh(&adapter->req_q.lock);
 	return retval;
 }
 
@@ -1965,13 +1965,13 @@ int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
 	struct zfcp_fsf_req *req;
 	int retval = -EIO;
 
-	spin_lock(&adapter->req_q.lock);
+	spin_lock_bh(&adapter->req_q.lock);
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
 				  ZFCP_REQ_AUTO_CLEANUP,
 				  adapter->pool.fsf_req_erp);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
@@ -1995,7 +1995,7 @@ int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
 		erp_action->fsf_req = NULL;
 	}
 out:
-	spin_unlock(&adapter->req_q.lock);
+	spin_unlock_bh(&adapter->req_q.lock);
 	return retval;
 }
 
@@ -2228,7 +2228,7 @@ int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
 		goto out;
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
 				  adapter->pool.fsf_req_scsi);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
@@ -2351,7 +2351,7 @@ struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *adapter,
 		goto out;
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
 				  adapter->pool.fsf_req_scsi);
-	if (unlikely(IS_ERR(req)))
+	if (IS_ERR(req))
 		goto out;
 
 	req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
@@ -2417,12 +2417,12 @@ struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
 		return ERR_PTR(-EINVAL);
 	}
 
-	spin_lock(&adapter->req_q.lock);
+	spin_lock_bh(&adapter->req_q.lock);
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 
 	req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL);
-	if (unlikely(IS_ERR(req))) {
+	if (IS_ERR(req)) {
 		retval = -EPERM;
 		goto out;
 	}
@@ -2447,7 +2447,7 @@ struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
 	zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
 	retval = zfcp_fsf_req_send(req);
 out:
-	spin_unlock(&adapter->req_q.lock);
+	spin_unlock_bh(&adapter->req_q.lock);
 
 	if (!retval) {
 		wait_event(req->completion_wq,
diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c
index d6dbd653fde..69d632d851d 100644
--- a/drivers/s390/scsi/zfcp_qdio.c
+++ b/drivers/s390/scsi/zfcp_qdio.c
@@ -423,9 +423,9 @@ void zfcp_qdio_close(struct zfcp_adapter *adapter)
 
 	/* clear QDIOUP flag, thus do_QDIO is not called during qdio_shutdown */
 	req_q = &adapter->req_q;
-	spin_lock(&req_q->lock);
+	spin_lock_bh(&req_q->lock);
 	atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status);
-	spin_unlock(&req_q->lock);
+	spin_unlock_bh(&req_q->lock);
 
 	qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR);
 
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index c7f06298bd3..4e0322b1c1e 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -63,7 +63,7 @@ comment "SCSI support type (disk, tape, CD-ROM)"
 config BLK_DEV_SD
 	tristate "SCSI disk support"
 	depends on SCSI
-	select CRC_T10DIF
+	select CRC_T10DIF if BLK_DEV_INTEGRITY
 	---help---
 	  If you want to use SCSI hard disks, Fibre Channel disks,
 	  Serial ATA (SATA) or Parallel ATA (PATA) hard disks,
diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c
index 994da56fffe..708e475896b 100644
--- a/drivers/scsi/device_handler/scsi_dh_alua.c
+++ b/drivers/scsi/device_handler/scsi_dh_alua.c
@@ -425,7 +425,7 @@ static int alua_check_sense(struct scsi_device *sdev,
 			/*
 			 * LUN Not Accessible - ALUA state transition
 			 */
-			return NEEDS_RETRY;
+			return ADD_TO_MLQUEUE;
 		if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x0b)
 			/*
 			 * LUN Not Accessible -- Target port in standby state
@@ -447,18 +447,18 @@ static int alua_check_sense(struct scsi_device *sdev,
 			/*
 			 * Power On, Reset, or Bus Device Reset, just retry.
 			 */
-			return NEEDS_RETRY;
+			return ADD_TO_MLQUEUE;
 		if (sense_hdr->asc == 0x2a && sense_hdr->ascq == 0x06) {
 			/*
 			 * ALUA state changed
 			 */
-			return NEEDS_RETRY;
+			return ADD_TO_MLQUEUE;
 		}
 		if (sense_hdr->asc == 0x2a && sense_hdr->ascq == 0x07) {
 			/*
 			 * Implicit ALUA state transition failed
 			 */
-			return NEEDS_RETRY;
+			return ADD_TO_MLQUEUE;
 		}
 		break;
 	}
@@ -490,7 +490,7 @@ static int alua_stpg(struct scsi_device *sdev, int state,
 		if (!err)
 			return SCSI_DH_IO;
 		err = alua_check_sense(sdev, &sense_hdr);
-		if (retry > 0 && err == NEEDS_RETRY) {
+		if (retry > 0 && err == ADD_TO_MLQUEUE) {
 			retry--;
 			goto retry;
 		}
@@ -535,7 +535,7 @@ static int alua_rtpg(struct scsi_device *sdev, struct alua_dh_data *h)
 			return SCSI_DH_IO;
 
 		err = alua_check_sense(sdev, &sense_hdr);
-		if (err == NEEDS_RETRY)
+		if (err == ADD_TO_MLQUEUE)
 			goto retry;
 		sdev_printk(KERN_INFO, sdev,
 			    "%s: rtpg sense code %02x/%02x/%02x\n",
diff --git a/drivers/scsi/device_handler/scsi_dh_emc.c b/drivers/scsi/device_handler/scsi_dh_emc.c
index b9d23e9e9a4..ef693e8412e 100644
--- a/drivers/scsi/device_handler/scsi_dh_emc.c
+++ b/drivers/scsi/device_handler/scsi_dh_emc.c
@@ -439,7 +439,7 @@ static int clariion_check_sense(struct scsi_device *sdev,
 			 * Unit Attention Code. This is the first IO
 			 * to the new path, so just retry.
 			 */
-			return NEEDS_RETRY;
+			return ADD_TO_MLQUEUE;
 		break;
 	}
 
@@ -514,7 +514,7 @@ retry:
 			return SCSI_DH_IO;
 
 		err = clariion_check_sense(sdev, &sshdr);
-		if (retry > 0 && err == NEEDS_RETRY) {
+		if (retry > 0 && err == ADD_TO_MLQUEUE) {
 			retry--;
 			goto retry;
 		}
diff --git a/drivers/scsi/device_handler/scsi_dh_rdac.c b/drivers/scsi/device_handler/scsi_dh_rdac.c
index 2dee69da35c..6e2f130d56d 100644
--- a/drivers/scsi/device_handler/scsi_dh_rdac.c
+++ b/drivers/scsi/device_handler/scsi_dh_rdac.c
@@ -551,7 +551,7 @@ static int rdac_check_sense(struct scsi_device *sdev,
 			 *
 			 * Just retry and wait.
 			 */
-			return NEEDS_RETRY;
+			return ADD_TO_MLQUEUE;
 		break;
 	case ILLEGAL_REQUEST:
 		if (sense_hdr->asc == 0x94 && sense_hdr->ascq == 0x01) {
@@ -568,7 +568,7 @@ static int rdac_check_sense(struct scsi_device *sdev,
 			/*
 			 * Power On, Reset, or Bus Device Reset, just retry.
 			 */
-			return NEEDS_RETRY;
+			return ADD_TO_MLQUEUE;
 		break;
 	}
 	/* success just means we do not care what scsi-ml does */
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 880051c89bd..39ce3aba1da 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -391,7 +391,7 @@ static int scsi_check_sense(struct scsi_cmnd *scmd)
 
 	case HARDWARE_ERROR:
 		if (scmd->device->retry_hwerror)
-			return NEEDS_RETRY;
+			return ADD_TO_MLQUEUE;
 		else
 			return SUCCESS;
 
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index 84b4879cff1..34d0de6cd51 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -1080,7 +1080,8 @@ static int scsi_probe_and_add_lun(struct scsi_target *starget,
 	 * PDT=1Fh none (no FDD connected to the requested logical unit)
 	 */
 	if (((result[0] >> 5) == 1 || starget->pdt_1f_for_no_lun) &&
-	     (result[0] & 0x1f) == 0x1f) {
+	    (result[0] & 0x1f) == 0x1f &&
+	    !scsi_is_wlun(lun)) {
 		SCSI_LOG_SCAN_BUS(3, printk(KERN_INFO
 					"scsi scan: peripheral device type"
 					" of 31, no device added\n"));
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 2a2bc89aba8..e5e7d785645 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1875,7 +1875,6 @@ static int sd_probe(struct device *dev)
 
 	dev_set_drvdata(dev, sdkp);
 	add_disk(gd);
-	blk_register_filter(gd);
 	sd_dif_config_host(sdkp);
 
 	sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n",
@@ -1909,7 +1908,6 @@ static int sd_remove(struct device *dev)
 	struct scsi_disk *sdkp = dev_get_drvdata(dev);
 
 	device_del(&sdkp->dev);
-	blk_unregister_filter(sdkp->disk);
 	del_gendisk(sdkp->disk);
 	sd_shutdown(dev);
 
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 3292965bfd8..27f5bfd1def 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -656,7 +656,6 @@ static int sr_probe(struct device *dev)
 	dev_set_drvdata(dev, cd);
 	disk->flags |= GENHD_FL_REMOVABLE;
 	add_disk(disk);
-	blk_register_filter(disk);
 
 	sdev_printk(KERN_DEBUG, sdev,
 		    "Attached scsi CD-ROM %s\n", cd->cdi.name);
@@ -895,7 +894,6 @@ static int sr_remove(struct device *dev)
 {
 	struct scsi_cd *cd = dev_get_drvdata(dev);
 
-	blk_unregister_filter(cd->disk);
 	del_gendisk(cd->disk);
 
 	mutex_lock(&sr_ref_mutex);
diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c
index 6a29f9330a7..3f90f1bbbbc 100644
--- a/drivers/serial/imx.c
+++ b/drivers/serial/imx.c
@@ -127,8 +127,13 @@
 #define  UCR3_RXDSEN	 (1<<6)  /* Receive status interrupt enable */
 #define  UCR3_AIRINTEN   (1<<5)  /* Async IR wake interrupt enable */
 #define  UCR3_AWAKEN	 (1<<4)  /* Async wake interrupt enable */
-#define  UCR3_REF25 	 (1<<3)  /* Ref freq 25 MHz */
-#define  UCR3_REF30 	 (1<<2)  /* Ref Freq 30 MHz */
+#ifdef CONFIG_ARCH_IMX
+#define  UCR3_REF25 	 (1<<3)  /* Ref freq 25 MHz, only on mx1 */
+#define  UCR3_REF30 	 (1<<2)  /* Ref Freq 30 MHz, only on mx1 */
+#endif
+#if defined CONFIG_ARCH_MX2 || defined CONFIG_ARCH_MX3
+#define  UCR3_RXDMUXSEL	 (1<<2)  /* RXD Muxed Input Select, on mx2/mx3 */
+#endif
 #define  UCR3_INVT  	 (1<<1)  /* Inverted Infrared transmission */
 #define  UCR3_BPEN  	 (1<<0)  /* Preset registers enable */
 #define  UCR4_CTSTL_32   (32<<10) /* CTS trigger level (32 chars) */
@@ -445,7 +450,7 @@ static irqreturn_t imx_int(int irq, void *dev_id)
 			readl(sport->port.membase + UCR1) & UCR1_TXMPTYEN)
 		imx_txint(irq, dev_id);
 
-	if (sts & USR1_RTSS)
+	if (sts & USR1_RTSD)
 		imx_rtsint(irq, dev_id);
 
 	return IRQ_HANDLED;
@@ -598,6 +603,12 @@ static int imx_startup(struct uart_port *port)
 	temp |= (UCR2_RXEN | UCR2_TXEN);
 	writel(temp, sport->port.membase + UCR2);
 
+#if defined CONFIG_ARCH_MX2 || defined CONFIG_ARCH_MX3
+	temp = readl(sport->port.membase + UCR3);
+	temp |= UCR3_RXDMUXSEL;
+	writel(temp, sport->port.membase + UCR3);
+#endif
+
 	/*
 	 * Enable modem status interrupts
 	 */
@@ -1133,13 +1144,19 @@ static int serial_imx_probe(struct platform_device *pdev)
 	if(pdata && (pdata->flags & IMXUART_HAVE_RTSCTS))
 		sport->have_rtscts = 1;
 
-	if (pdata->init)
-		pdata->init(pdev);
+	if (pdata->init) {
+		ret = pdata->init(pdev);
+		if (ret)
+			goto clkput;
+	}
 
 	uart_add_one_port(&imx_reg, &sport->port);
 	platform_set_drvdata(pdev, &sport->port);
 
 	return 0;
+clkput:
+	clk_put(sport->clk);
+	clk_disable(sport->clk);
 unmap:
 	iounmap(sport->port.membase);
 free:
diff --git a/drivers/spi/pxa2xx_spi.c b/drivers/spi/pxa2xx_spi.c
index 34c7c987568..0e53354c1cf 100644
--- a/drivers/spi/pxa2xx_spi.c
+++ b/drivers/spi/pxa2xx_spi.c
@@ -47,9 +47,10 @@ MODULE_ALIAS("platform:pxa2xx-spi");
 
 #define MAX_BUSES 3
 
-#define DMA_INT_MASK (DCSR_ENDINTR | DCSR_STARTINTR | DCSR_BUSERR)
-#define RESET_DMA_CHANNEL (DCSR_NODESC | DMA_INT_MASK)
-#define IS_DMA_ALIGNED(x) (((u32)(x)&0x07)==0)
+#define DMA_INT_MASK		(DCSR_ENDINTR | DCSR_STARTINTR | DCSR_BUSERR)
+#define RESET_DMA_CHANNEL	(DCSR_NODESC | DMA_INT_MASK)
+#define IS_DMA_ALIGNED(x)	(((x) & 0x07) == 0)
+#define MAX_DMA_LEN		8191
 
 /*
  * for testing SSCR1 changes that require SSP restart, basically
@@ -144,7 +145,6 @@ struct driver_data {
 	size_t tx_map_len;
 	u8 n_bytes;
 	u32 dma_width;
-	int cs_change;
 	int (*write)(struct driver_data *drv_data);
 	int (*read)(struct driver_data *drv_data);
 	irqreturn_t (*transfer_handler)(struct driver_data *drv_data);
@@ -406,8 +406,45 @@ static void giveback(struct driver_data *drv_data)
 					struct spi_transfer,
 					transfer_list);
 
+	/* Delay if requested before any change in chip select */
+	if (last_transfer->delay_usecs)
+		udelay(last_transfer->delay_usecs);
+
+	/* Drop chip select UNLESS cs_change is true or we are returning
+	 * a message with an error, or next message is for another chip
+	 */
 	if (!last_transfer->cs_change)
 		drv_data->cs_control(PXA2XX_CS_DEASSERT);
+	else {
+		struct spi_message *next_msg;
+
+		/* Holding of cs was hinted, but we need to make sure
+		 * the next message is for the same chip.  Don't waste
+		 * time with the following tests unless this was hinted.
+		 *
+		 * We cannot postpone this until pump_messages, because
+		 * after calling msg->complete (below) the driver that
+		 * sent the current message could be unloaded, which
+		 * could invalidate the cs_control() callback...
+		 */
+
+		/* get a pointer to the next message, if any */
+		spin_lock_irqsave(&drv_data->lock, flags);
+		if (list_empty(&drv_data->queue))
+			next_msg = NULL;
+		else
+			next_msg = list_entry(drv_data->queue.next,
+					struct spi_message, queue);
+		spin_unlock_irqrestore(&drv_data->lock, flags);
+
+		/* see if the next and current messages point
+		 * to the same chip
+		 */
+		if (next_msg && next_msg->spi != msg->spi)
+			next_msg = NULL;
+		if (!next_msg || msg->state == ERROR_STATE)
+			drv_data->cs_control(PXA2XX_CS_DEASSERT);
+	}
 
 	msg->state = NULL;
 	if (msg->complete)
@@ -490,10 +527,9 @@ static void dma_transfer_complete(struct driver_data *drv_data)
 	msg->actual_length += drv_data->len -
 				(drv_data->rx_end - drv_data->rx);
 
-	/* Release chip select if requested, transfer delays are
-	 * handled in pump_transfers */
-	if (drv_data->cs_change)
-		drv_data->cs_control(PXA2XX_CS_DEASSERT);
+	/* Transfer delays and chip select release are
+	 * handled in pump_transfers or giveback
+	 */
 
 	/* Move to next transfer */
 	msg->state = next_transfer(drv_data);
@@ -602,10 +638,9 @@ static void int_transfer_complete(struct driver_data *drv_data)
 	drv_data->cur_msg->actual_length += drv_data->len -
 				(drv_data->rx_end - drv_data->rx);
 
-	/* Release chip select if requested, transfer delays are
-	 * handled in pump_transfers */
-	if (drv_data->cs_change)
-		drv_data->cs_control(PXA2XX_CS_DEASSERT);
+	/* Transfer delays and chip select release are
+	 * handled in pump_transfers or giveback
+	 */
 
 	/* Move to next transfer */
 	drv_data->cur_msg->state = next_transfer(drv_data);
@@ -840,23 +875,40 @@ static void pump_transfers(unsigned long data)
 		return;
 	}
 
-	/* Delay if requested at end of transfer*/
+	/* Delay if requested at end of transfer before CS change */
 	if (message->state == RUNNING_STATE) {
 		previous = list_entry(transfer->transfer_list.prev,
 					struct spi_transfer,
 					transfer_list);
 		if (previous->delay_usecs)
 			udelay(previous->delay_usecs);
+
+		/* Drop chip select only if cs_change is requested */
+		if (previous->cs_change)
+			drv_data->cs_control(PXA2XX_CS_DEASSERT);
 	}
 
-	/* Check transfer length */
-	if (transfer->len > 8191)
-	{
-		dev_warn(&drv_data->pdev->dev, "pump_transfers: transfer "
-				"length greater than 8191\n");
-		message->status = -EINVAL;
-		giveback(drv_data);
-		return;
+	/* Check for transfers that need multiple DMA segments */
+	if (transfer->len > MAX_DMA_LEN && chip->enable_dma) {
+
+		/* reject already-mapped transfers; PIO won't always work */
+		if (message->is_dma_mapped
+				|| transfer->rx_dma || transfer->tx_dma) {
+			dev_err(&drv_data->pdev->dev,
+				"pump_transfers: mapped transfer length "
+				"of %lu is greater than %d\n",
+				transfer->len, MAX_DMA_LEN);
+			message->status = -EINVAL;
+			giveback(drv_data);
+			return;
+		}
+
+		/* warn ... we force this to PIO mode */
+		if (printk_ratelimit())
+			dev_warn(&message->spi->dev, "pump_transfers: "
+				"DMA disabled for transfer length %ld "
+				"greater than %d\n",
+				(long)drv_data->len, MAX_DMA_LEN);
 	}
 
 	/* Setup the transfer state based on the type of transfer */
@@ -878,7 +930,6 @@ static void pump_transfers(unsigned long data)
 	drv_data->len = transfer->len & DCMD_LENGTH;
 	drv_data->write = drv_data->tx ? chip->write : null_writer;
 	drv_data->read = drv_data->rx ? chip->read : null_reader;
-	drv_data->cs_change = transfer->cs_change;
 
 	/* Change speed and bit per word on a per transfer */
 	cr0 = chip->cr0;
@@ -925,7 +976,7 @@ static void pump_transfers(unsigned long data)
 							&dma_thresh))
 				if (printk_ratelimit())
 					dev_warn(&message->spi->dev,
-						"pump_transfer: "
+						"pump_transfers: "
 						"DMA burst size reduced to "
 						"match bits_per_word\n");
 		}
@@ -939,8 +990,23 @@ static void pump_transfers(unsigned long data)
 
 	message->state = RUNNING_STATE;
 
-	/* Try to map dma buffer and do a dma transfer if successful */
-	if ((drv_data->dma_mapped = map_dma_buffers(drv_data))) {
+	/* Try to map dma buffer and do a dma transfer if successful, but
+	 * only if the length is non-zero and less than MAX_DMA_LEN.
+	 *
+	 * Zero-length non-descriptor DMA is illegal on PXA2xx; force use
+	 * of PIO instead.  Care is needed above because the transfer may
+	 * have have been passed with buffers that are already dma mapped.
+	 * A zero-length transfer in PIO mode will not try to write/read
+	 * to/from the buffers
+	 *
+	 * REVISIT large transfers are exactly where we most want to be
+	 * using DMA.  If this happens much, split those transfers into
+	 * multiple DMA segments rather than forcing PIO.
+	 */
+	drv_data->dma_mapped = 0;
+	if (drv_data->len > 0 && drv_data->len <= MAX_DMA_LEN)
+		drv_data->dma_mapped = map_dma_buffers(drv_data);
+	if (drv_data->dma_mapped) {
 
 		/* Ensure we have the correct interrupt handler */
 		drv_data->transfer_handler = dma_transfer;
diff --git a/drivers/spi/spi_mpc83xx.c b/drivers/spi/spi_mpc83xx.c
index 070c6219e2d..ac0e3e4b3c5 100644
--- a/drivers/spi/spi_mpc83xx.c
+++ b/drivers/spi/spi_mpc83xx.c
@@ -267,16 +267,13 @@ int mpc83xx_spi_setup_transfer(struct spi_device *spi, struct spi_transfer *t)
 	cs->hw_mode |= SPMODE_LEN(bits_per_word);
 
 	if ((mpc83xx_spi->spibrg / hz) > 64) {
+		cs->hw_mode |= SPMODE_DIV16;
 		pm = mpc83xx_spi->spibrg / (hz * 64);
 		if (pm > 16) {
-			cs->hw_mode |= SPMODE_DIV16;
-			pm /= 16;
-			if (pm > 16) {
-				dev_err(&spi->dev, "Requested speed is too "
-					"low: %d Hz. Will use %d Hz instead.\n",
-					hz, mpc83xx_spi->spibrg / 1024);
-				pm = 16;
-			}
+			dev_err(&spi->dev, "Requested speed is too "
+				"low: %d Hz. Will use %d Hz instead.\n",
+				hz, mpc83xx_spi->spibrg / 1024);
+			pm = 16;
 		}
 	} else
 		pm = mpc83xx_spi->spibrg / (hz * 4);
@@ -315,11 +312,20 @@ static int mpc83xx_spi_bufs(struct spi_device *spi, struct spi_transfer *t)
 	if (t->bits_per_word)
 		bits_per_word = t->bits_per_word;
 	len = t->len;
-	if (bits_per_word > 8)
+	if (bits_per_word > 8) {
+		/* invalid length? */
+		if (len & 1)
+			return -EINVAL;
 		len /= 2;
-	if (bits_per_word > 16)
+	}
+	if (bits_per_word > 16) {
+		/* invalid length? */
+		if (len & 1)
+			return -EINVAL;
 		len /= 2;
+	}
 	mpc83xx_spi->count = len;
+
 	INIT_COMPLETION(mpc83xx_spi->done);
 
 	/* enable rx ints */
diff --git a/drivers/spi/spi_s3c24xx.c b/drivers/spi/spi_s3c24xx.c
index 98abc73c1a1..3eb414b84a9 100644
--- a/drivers/spi/spi_s3c24xx.c
+++ b/drivers/spi/spi_s3c24xx.c
@@ -430,7 +430,7 @@ static int s3c24xx_spi_resume(struct platform_device *pdev)
 #endif
 
 MODULE_ALIAS("platform:s3c2410-spi");
-static struct platform_driver s3c24xx_spidrv = {
+static struct platform_driver s3c24xx_spi_driver = {
 	.remove		= __exit_p(s3c24xx_spi_remove),
 	.suspend	= s3c24xx_spi_suspend,
 	.resume		= s3c24xx_spi_resume,
@@ -442,12 +442,12 @@ static struct platform_driver s3c24xx_spidrv = {
 
 static int __init s3c24xx_spi_init(void)
 {
-        return platform_driver_probe(&s3c24xx_spidrv, s3c24xx_spi_probe);
+        return platform_driver_probe(&s3c24xx_spi_driver, s3c24xx_spi_probe);
 }
 
 static void __exit s3c24xx_spi_exit(void)
 {
-        platform_driver_unregister(&s3c24xx_spidrv);
+        platform_driver_unregister(&s3c24xx_spi_driver);
 }
 
 module_init(s3c24xx_spi_init);
diff --git a/drivers/video/atmel_lcdfb.c b/drivers/video/atmel_lcdfb.c
index 5a24c6411d3..75dac578104 100644
--- a/drivers/video/atmel_lcdfb.c
+++ b/drivers/video/atmel_lcdfb.c
@@ -208,6 +208,36 @@ static unsigned long compute_hozval(unsigned long xres, unsigned long lcdcon2)
 	return value;
 }
 
+static void atmel_lcdfb_stop_nowait(struct atmel_lcdfb_info *sinfo)
+{
+	/* Turn off the LCD controller and the DMA controller */
+	lcdc_writel(sinfo, ATMEL_LCDC_PWRCON,
+			sinfo->guard_time << ATMEL_LCDC_GUARDT_OFFSET);
+
+	/* Wait for the LCDC core to become idle */
+	while (lcdc_readl(sinfo, ATMEL_LCDC_PWRCON) & ATMEL_LCDC_BUSY)
+		msleep(10);
+
+	lcdc_writel(sinfo, ATMEL_LCDC_DMACON, 0);
+}
+
+static void atmel_lcdfb_stop(struct atmel_lcdfb_info *sinfo)
+{
+	atmel_lcdfb_stop_nowait(sinfo);
+
+	/* Wait for DMA engine to become idle... */
+	while (lcdc_readl(sinfo, ATMEL_LCDC_DMACON) & ATMEL_LCDC_DMABUSY)
+		msleep(10);
+}
+
+static void atmel_lcdfb_start(struct atmel_lcdfb_info *sinfo)
+{
+	lcdc_writel(sinfo, ATMEL_LCDC_DMACON, sinfo->default_dmacon);
+	lcdc_writel(sinfo, ATMEL_LCDC_PWRCON,
+		(sinfo->guard_time << ATMEL_LCDC_GUARDT_OFFSET)
+		| ATMEL_LCDC_PWR);
+}
+
 static void atmel_lcdfb_update_dma(struct fb_info *info,
 			       struct fb_var_screeninfo *var)
 {
@@ -420,26 +450,8 @@ static void atmel_lcdfb_reset(struct atmel_lcdfb_info *sinfo)
 {
 	might_sleep();
 
-	/* LCD power off */
-	lcdc_writel(sinfo, ATMEL_LCDC_PWRCON, sinfo->guard_time << ATMEL_LCDC_GUARDT_OFFSET);
-
-	/* wait for the LCDC core to become idle */
-	while (lcdc_readl(sinfo, ATMEL_LCDC_PWRCON) & ATMEL_LCDC_BUSY)
-		msleep(10);
-
-	/* DMA disable */
-	lcdc_writel(sinfo, ATMEL_LCDC_DMACON, 0);
-
-	/* wait for DMA engine to become idle */
-	while (lcdc_readl(sinfo, ATMEL_LCDC_DMACON) & ATMEL_LCDC_DMABUSY)
-		msleep(10);
-
-	/* LCD power on */
-	lcdc_writel(sinfo, ATMEL_LCDC_PWRCON,
-		(sinfo->guard_time << ATMEL_LCDC_GUARDT_OFFSET) | ATMEL_LCDC_PWR);
-
-	/* DMA enable */
-	lcdc_writel(sinfo, ATMEL_LCDC_DMACON, sinfo->default_dmacon);
+	atmel_lcdfb_stop(sinfo);
+	atmel_lcdfb_start(sinfo);
 }
 
 /**
@@ -471,14 +483,7 @@ static int atmel_lcdfb_set_par(struct fb_info *info)
 		 info->var.xres, info->var.yres,
 		 info->var.xres_virtual, info->var.yres_virtual);
 
-	/* Turn off the LCD controller and the DMA controller */
-	lcdc_writel(sinfo, ATMEL_LCDC_PWRCON, sinfo->guard_time << ATMEL_LCDC_GUARDT_OFFSET);
-
-	/* Wait for the LCDC core to become idle */
-	while (lcdc_readl(sinfo, ATMEL_LCDC_PWRCON) & ATMEL_LCDC_BUSY)
-		msleep(10);
-
-	lcdc_writel(sinfo, ATMEL_LCDC_DMACON, 0);
+	atmel_lcdfb_stop_nowait(sinfo);
 
 	if (info->var.bits_per_pixel == 1)
 		info->fix.visual = FB_VISUAL_MONO01;
@@ -583,13 +588,7 @@ static int atmel_lcdfb_set_par(struct fb_info *info)
 	while (lcdc_readl(sinfo, ATMEL_LCDC_DMACON) & ATMEL_LCDC_DMABUSY)
 		msleep(10);
 
-	dev_dbg(info->device, "  * re-enable DMA engine\n");
-	/* ...and enable it with updated configuration */
-	lcdc_writel(sinfo, ATMEL_LCDC_DMACON, sinfo->default_dmacon);
-
-	dev_dbg(info->device, "  * re-enable LCDC core\n");
-	lcdc_writel(sinfo, ATMEL_LCDC_PWRCON,
-		(sinfo->guard_time << ATMEL_LCDC_GUARDT_OFFSET) | ATMEL_LCDC_PWR);
+	atmel_lcdfb_start(sinfo);
 
 	dev_dbg(info->device, "  * DONE\n");
 
@@ -1032,11 +1031,20 @@ static int atmel_lcdfb_suspend(struct platform_device *pdev, pm_message_t mesg)
 	struct fb_info *info = platform_get_drvdata(pdev);
 	struct atmel_lcdfb_info *sinfo = info->par;
 
+	/*
+	 * We don't want to handle interrupts while the clock is
+	 * stopped. It may take forever.
+	 */
+	lcdc_writel(sinfo, ATMEL_LCDC_IDR, ~0UL);
+
 	sinfo->saved_lcdcon = lcdc_readl(sinfo, ATMEL_LCDC_CONTRAST_VAL);
 	lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, 0);
 	if (sinfo->atmel_lcdfb_power_control)
 		sinfo->atmel_lcdfb_power_control(0);
+
+	atmel_lcdfb_stop(sinfo);
 	atmel_lcdfb_stop_clock(sinfo);
+
 	return 0;
 }
 
@@ -1046,9 +1054,15 @@ static int atmel_lcdfb_resume(struct platform_device *pdev)
 	struct atmel_lcdfb_info *sinfo = info->par;
 
 	atmel_lcdfb_start_clock(sinfo);
+	atmel_lcdfb_start(sinfo);
 	if (sinfo->atmel_lcdfb_power_control)
 		sinfo->atmel_lcdfb_power_control(1);
 	lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, sinfo->saved_lcdcon);
+
+	/* Enable FIFO & DMA errors */
+	lcdc_writel(sinfo, ATMEL_LCDC_IER, ATMEL_LCDC_UFLWI
+			| ATMEL_LCDC_OWRI | ATMEL_LCDC_MERI);
+
 	return 0;
 }