Merge branch 'upstream'

7 files changed, 31 insertions, 83 deletions

diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
index cbab5868ffd..3df74a08fe2 100644
--- a/drivers/scsi/ahci.c
+++ b/drivers/scsi/ahci.c
@@ -192,7 +192,6 @@ static void ahci_port_stop(struct ata_port *ap);
 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
 static void ahci_qc_prep(struct ata_queued_cmd *qc);
 static u8 ahci_check_status(struct ata_port *ap);
-static u8 ahci_check_err(struct ata_port *ap);
 static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
 static void ahci_remove_one (struct pci_dev *pdev);
 
@@ -221,7 +220,6 @@ static const struct ata_port_operations ahci_ops = {
 
 	.check_status		= ahci_check_status,
 	.check_altstatus	= ahci_check_status,
-	.check_err		= ahci_check_err,
 	.dev_select		= ata_noop_dev_select,
 
 	.tf_read		= ahci_tf_read,
@@ -466,13 +464,6 @@ static u8 ahci_check_status(struct ata_port *ap)
 	return readl(mmio + PORT_TFDATA) & 0xFF;
 }
 
-static u8 ahci_check_err(struct ata_port *ap)
-{
-	void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr;
-
-	return (readl(mmio + PORT_TFDATA) >> 8) & 0xFF;
-}
-
 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
 {
 	struct ahci_port_priv *pp = ap->private_data;
diff --git a/drivers/scsi/arm/scsi.h b/drivers/scsi/arm/scsi.h
index 48e1c4d9738..19937640e2e 100644
--- a/drivers/scsi/arm/scsi.h
+++ b/drivers/scsi/arm/scsi.h
@@ -10,6 +10,8 @@
  *  Commonly used scsi driver functions.
  */
 
+#include <linux/scatterlist.h>
+
 #define BELT_AND_BRACES
 
 /*
@@ -22,9 +24,7 @@ static inline int copy_SCp_to_sg(struct scatterlist *sg, Scsi_Pointer *SCp, int
 
 	BUG_ON(bufs + 1 > max);
 
-	sg->page   = virt_to_page(SCp->ptr);
-	sg->offset = offset_in_page(SCp->ptr);
-	sg->length = SCp->this_residual;
+	sg_set_buf(sg, SCp->ptr, SCp->this_residual);
 
 	if (bufs)
 		memcpy(sg + 1, SCp->buffer + 1,
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 3171e386f70..0d58f4d3e5c 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -49,6 +49,7 @@
 #include <linux/suspend.h>
 #include <linux/workqueue.h>
 #include <linux/jiffies.h>
+#include <linux/scatterlist.h>
 #include <scsi/scsi.h>
 #include "scsi.h"
 #include "scsi_priv.h"
@@ -371,7 +372,7 @@ static void ata_tf_read_pio(struct ata_port *ap, struct ata_taskfile *tf)
 	struct ata_ioports *ioaddr = &ap->ioaddr;
 
 	tf->command = ata_check_status(ap);
-	tf->feature = ata_chk_err(ap);
+	tf->feature = inb(ioaddr->error_addr);
 	tf->nsect = inb(ioaddr->nsect_addr);
 	tf->lbal = inb(ioaddr->lbal_addr);
 	tf->lbam = inb(ioaddr->lbam_addr);
@@ -405,7 +406,7 @@ static void ata_tf_read_mmio(struct ata_port *ap, struct ata_taskfile *tf)
 	struct ata_ioports *ioaddr = &ap->ioaddr;
 
 	tf->command = ata_check_status(ap);
-	tf->feature = ata_chk_err(ap);
+	tf->feature = readb((void __iomem *)ioaddr->error_addr);
 	tf->nsect = readb((void __iomem *)ioaddr->nsect_addr);
 	tf->lbal = readb((void __iomem *)ioaddr->lbal_addr);
 	tf->lbam = readb((void __iomem *)ioaddr->lbam_addr);
@@ -526,30 +527,6 @@ u8 ata_altstatus(struct ata_port *ap)
 
 
 /**
- *	ata_chk_err - Read device error reg
- *	@ap: port where the device is
- *
- *	Reads ATA taskfile error register for
- *	currently-selected device and return its value.
- *
- *	Note: may NOT be used as the check_err() entry in
- *	ata_port_operations.
- *
- *	LOCKING:
- *	Inherited from caller.
- */
-u8 ata_chk_err(struct ata_port *ap)
-{
-	if (ap->ops->check_err)
-		return ap->ops->check_err(ap);
-
-	if (ap->flags & ATA_FLAG_MMIO) {
-		return readb((void __iomem *) ap->ioaddr.error_addr);
-	}
-	return inb(ap->ioaddr.error_addr);
-}
-
-/**
  *	ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
  *	@tf: Taskfile to convert
  *	@fis: Buffer into which data will output
@@ -901,8 +878,8 @@ static u8 ata_dev_try_classify(struct ata_port *ap, unsigned int device)
 
 	memset(&tf, 0, sizeof(tf));
 
-	err = ata_chk_err(ap);
 	ap->ops->tf_read(ap, &tf);
+	err = tf.feature;
 
 	dev->class = ATA_DEV_NONE;
 
@@ -1139,7 +1116,6 @@ static void ata_dev_identify(struct ata_port *ap, unsigned int device)
 	unsigned int major_version;
 	u16 tmp;
 	unsigned long xfer_modes;
-	u8 status;
 	unsigned int using_edd;
 	DECLARE_COMPLETION(wait);
 	struct ata_queued_cmd *qc;
@@ -1193,8 +1169,11 @@ retry:
 	else
 		wait_for_completion(&wait);
 
-	status = ata_chk_status(ap);
-	if (status & ATA_ERR) {
+	spin_lock_irqsave(&ap->host_set->lock, flags);
+	ap->ops->tf_read(ap, &qc->tf);
+	spin_unlock_irqrestore(&ap->host_set->lock, flags);
+
+	if (qc->tf.command & ATA_ERR) {
 		/*
 		 * arg!  EDD works for all test cases, but seems to return
 		 * the ATA signature for some ATAPI devices.  Until the
@@ -1207,7 +1186,7 @@ retry:
 		 * to have this problem.
 		 */
 		if ((using_edd) && (qc->tf.command == ATA_CMD_ID_ATA)) {
-			u8 err = ata_chk_err(ap);
+			u8 err = qc->tf.feature;
 			if (err & ATA_ABORTED) {
 				dev->class = ATA_DEV_ATAPI;
 				qc->cursg = 0;
@@ -2609,9 +2588,7 @@ void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen)
 	qc->buf_virt = buf;
 
 	sg = qc->__sg;
-	sg->page = virt_to_page(buf);
-	sg->offset = (unsigned long) buf & ~PAGE_MASK;
-	sg->length = buflen;
+	sg_init_one(sg, buf, buflen);
 }
 
 /**
@@ -4962,7 +4939,6 @@ EXPORT_SYMBOL_GPL(ata_tf_to_fis);
 EXPORT_SYMBOL_GPL(ata_tf_from_fis);
 EXPORT_SYMBOL_GPL(ata_check_status);
 EXPORT_SYMBOL_GPL(ata_altstatus);
-EXPORT_SYMBOL_GPL(ata_chk_err);
 EXPORT_SYMBOL_GPL(ata_exec_command);
 EXPORT_SYMBOL_GPL(ata_port_start);
 EXPORT_SYMBOL_GPL(ata_port_stop);
diff --git a/drivers/scsi/sata_mv.c b/drivers/scsi/sata_mv.c
index 1d6d0c9e76f..ad4808ef71d 100644
--- a/drivers/scsi/sata_mv.c
+++ b/drivers/scsi/sata_mv.c
@@ -258,7 +258,6 @@ struct mv_host_priv {
 static void mv_irq_clear(struct ata_port *ap);
 static u32 mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in);
 static void mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val);
-static u8 mv_check_err(struct ata_port *ap);
 static void mv_phy_reset(struct ata_port *ap);
 static void mv_host_stop(struct ata_host_set *host_set);
 static int mv_port_start(struct ata_port *ap);
@@ -296,7 +295,6 @@ static const struct ata_port_operations mv_ops = {
 	.tf_load		= ata_tf_load,
 	.tf_read		= ata_tf_read,
 	.check_status		= ata_check_status,
-	.check_err		= mv_check_err,
 	.exec_command		= ata_exec_command,
 	.dev_select		= ata_std_dev_select,
 
@@ -1186,22 +1184,6 @@ static irqreturn_t mv_interrupt(int irq, void *dev_instance,
 }
 
 /**
- *      mv_check_err - Return the error shadow register to caller.
- *      @ap: ATA channel to manipulate
- *
- *      Marvell requires DMA to be stopped before accessing shadow
- *      registers.  So we do that, then return the needed register.
- *
- *      LOCKING:
- *      Inherited from caller.  FIXME: protect mv_stop_dma with lock?
- */
-static u8 mv_check_err(struct ata_port *ap)
-{
-	mv_stop_dma(ap);		/* can't read shadow regs if DMA on */
-	return readb((void __iomem *) ap->ioaddr.error_addr);
-}
-
-/**
  *      mv_phy_reset - Perform eDMA reset followed by COMRESET
  *      @ap: ATA channel to manipulate
  *
diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c
index 423096f7fe9..7e6e5c049b7 100644
--- a/drivers/scsi/sata_sil24.c
+++ b/drivers/scsi/sata_sil24.c
@@ -225,7 +225,6 @@ struct sil24_host_priv {
 };
 
 static u8 sil24_check_status(struct ata_port *ap);
-static u8 sil24_check_err(struct ata_port *ap);
 static u32 sil24_scr_read(struct ata_port *ap, unsigned sc_reg);
 static void sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val);
 static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
@@ -280,7 +279,6 @@ static const struct ata_port_operations sil24_ops = {
 
 	.check_status		= sil24_check_status,
 	.check_altstatus	= sil24_check_status,
-	.check_err		= sil24_check_err,
 	.dev_select		= ata_noop_dev_select,
 
 	.tf_read		= sil24_tf_read,
@@ -363,12 +361,6 @@ static u8 sil24_check_status(struct ata_port *ap)
 	return pp->tf.command;
 }
 
-static u8 sil24_check_err(struct ata_port *ap)
-{
-	struct sil24_port_priv *pp = ap->private_data;
-	return pp->tf.feature;
-}
-
 static int sil24_scr_map[] = {
 	[SCR_CONTROL]	= 0,
 	[SCR_STATUS]	= 1,
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 861e51375d7..d86d5c26061 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -49,6 +49,7 @@ static int sg_version_num = 30533;	/* 2 digits for each component */
 #include <linux/seq_file.h>
 #include <linux/blkdev.h>
 #include <linux/delay.h>
+#include <linux/scatterlist.h>
 
 #include "scsi.h"
 #include <scsi/scsi_dbg.h>
@@ -1886,13 +1887,17 @@ st_unmap_user_pages(struct scatterlist *sgl, const unsigned int nr_pages,
 	int i;
 
 	for (i=0; i < nr_pages; i++) {
-		if (dirtied && !PageReserved(sgl[i].page))
-			SetPageDirty(sgl[i].page);
-		/* unlock_page(sgl[i].page); */
+		struct page *page = sgl[i].page;
+
+		/* XXX: just for debug. Remove when PageReserved is removed */
+		BUG_ON(PageReserved(page));
+		if (dirtied)
+			SetPageDirty(page);
+		/* unlock_page(page); */
 		/* FIXME: cache flush missing for rw==READ
 		 * FIXME: call the correct reference counting function
 		 */
-		page_cache_release(sgl[i].page);
+		page_cache_release(page);
 	}
 
 	return 0;
@@ -1992,9 +1997,7 @@ sg_build_indirect(Sg_scatter_hold * schp, Sg_fd * sfp, int buff_size)
 				if (!p)
 					break;
 			}
-			sclp->page = virt_to_page(p);
-			sclp->offset = offset_in_page(p);
-			sclp->length = ret_sz;
+			sg_set_buf(sclp, p, ret_sz);
 
 			SCSI_LOG_TIMEOUT(5, printk("sg_build_build: k=%d, a=0x%p, len=%d\n",
 					  k, sg_scatg2virt(sclp), ret_sz));
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index 5eb54d8019b..da9766283bd 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -4526,12 +4526,16 @@ static int sgl_unmap_user_pages(struct scatterlist *sgl, const unsigned int nr_p
 	int i;
 
 	for (i=0; i < nr_pages; i++) {
-		if (dirtied && !PageReserved(sgl[i].page))
-			SetPageDirty(sgl[i].page);
+		struct page *page = sgl[i].page;
+
+		/* XXX: just for debug. Remove when PageReserved is removed */
+		BUG_ON(PageReserved(page));
+		if (dirtied)
+			SetPageDirty(page);
 		/* FIXME: cache flush missing for rw==READ
 		 * FIXME: call the correct reference counting function
 		 */
-		page_cache_release(sgl[i].page);
+		page_cache_release(page);
 	}
 
 	return 0;