Merge tag 'for-usb-next-2014-03-06' of git://git.kernel.org/pub/scm/linux/kernel/git/sarah/xhci into usb-next

Sarah writes:

xhci: Streams and UAS cleanups, misc cleanups for 3.15

Hi Greg,

Here's 76 patches to queue to usb-next for 3.15.

The bulk of this rather large pull request is the UAS driver cleanup, the
xHCI streams fixes, and the new userspace API for usbfs to be able to use
and alloc/free bulk streams.  I've hammered on these changes, and the UAS
driver seems solid.  The performance numbers are pretty spiffy too:

root@xanatos:~# echo 3 > /proc/sys/vm/drop_caches; dd if=/dev/sdb of=/dev/null bs=4k count=1000M iflag=count_bytes
256000+0 records in
256000+0 records out
1048576000 bytes (1.0 GB) copied, 3.28557 s, 319 MB/s

That's about 100 MB/s faster than my fastest Bulk-only-Transport mass
storage drive.

There's a couple of miscellaneous cleanup patches and non-urgent bug fixes
in here as well:

7969943789df xhci: add the meaningful IRQ description if it is empty
bcffae7708eb xhci: Prevent runtime pm from autosuspending during initialization
e587b8b270d3 xhci: make warnings greppable
25cd2882e2fc usb/xhci: Change how we indicate a host supports Link PM.

Sarah Sharp

4 files changed, 16 insertions, 9 deletions

diff --git a/include/linux/usb.h b/include/linux/usb.h
index 7f6eb859873..f1015cee594 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -57,6 +57,7 @@ struct ep_device;
  * @extra: descriptors following this endpoint in the configuration
  * @extralen: how many bytes of "extra" are valid
  * @enabled: URBs may be submitted to this endpoint
+ * @streams: number of USB-3 streams allocated on the endpoint
  *
  * USB requests are always queued to a given endpoint, identified by a
  * descriptor within an active interface in a given USB configuration.
@@ -71,6 +72,7 @@ struct usb_host_endpoint {
 	unsigned char *extra;   /* Extra descriptors */
 	int extralen;
 	int enabled;
+	int streams;
 };
 
 /* host-side wrapper for one interface setting's parsed descriptors */
@@ -202,6 +204,8 @@ static inline void usb_set_intfdata(struct usb_interface *intf, void *data)
 struct usb_interface *usb_get_intf(struct usb_interface *intf);
 void usb_put_intf(struct usb_interface *intf);
 
+/* Hard limit */
+#define USB_MAXENDPOINTS	30
 /* this maximum is arbitrary */
 #define USB_MAXINTERFACES	32
 #define USB_MAXIADS		(USB_MAXINTERFACES/2)
diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h
index efe8d8a7c7a..485cd5e2100 100644
--- a/include/linux/usb/hcd.h
+++ b/include/linux/usb/hcd.h
@@ -143,6 +143,7 @@ struct usb_hcd {
 	unsigned		authorized_default:1;
 	unsigned		has_tt:1;	/* Integrated TT in root hub */
 	unsigned		amd_resume_bug:1; /* AMD remote wakeup quirk */
+	unsigned		can_do_streams:1; /* HC supports streams */
 
 	unsigned int		irq;		/* irq allocated */
 	void __iomem		*regs;		/* device memory/io */
diff --git a/include/linux/usb/uas.h b/include/linux/usb/uas.h
index 5499ab5c94b..3fc8e8b9f04 100644
--- a/include/linux/usb/uas.h
+++ b/include/linux/usb/uas.h
@@ -9,7 +9,7 @@ struct iu {
 	__u8 iu_id;
 	__u8 rsvd1;
 	__be16 tag;
-};
+} __attribute__((__packed__));
 
 enum {
 	IU_ID_COMMAND		= 0x01,
@@ -52,7 +52,7 @@ struct command_iu {
 	__u8 rsvd7;
 	struct scsi_lun lun;
 	__u8 cdb[16];	/* XXX: Overflow-checking tools may misunderstand */
-};
+} __attribute__((__packed__));
 
 struct task_mgmt_iu {
 	__u8 iu_id;
@@ -62,7 +62,7 @@ struct task_mgmt_iu {
 	__u8 rsvd2;
 	__be16 task_tag;
 	struct scsi_lun lun;
-};
+} __attribute__((__packed__));
 
 /*
  * Also used for the Read Ready and Write Ready IUs since they have the
@@ -77,15 +77,15 @@ struct sense_iu {
 	__u8 rsvd7[7];
 	__be16 len;
 	__u8 sense[SCSI_SENSE_BUFFERSIZE];
-};
+} __attribute__((__packed__));
 
-struct response_ui {
+struct response_iu {
 	__u8 iu_id;
 	__u8 rsvd1;
 	__be16 tag;
-	__be16 add_response_info;
+	__u8 add_response_info[3];
 	__u8 response_code;
-};
+} __attribute__((__packed__));
 
 struct usb_pipe_usage_descriptor {
 	__u8  bLength;
diff --git a/include/linux/usb_usual.h b/include/linux/usb_usual.h
index 63035686603..1a64b26046e 100644
--- a/include/linux/usb_usual.h
+++ b/include/linux/usb_usual.h
@@ -67,8 +67,10 @@
 		/* Initial READ(10) (and others) must be retried */	\
 	US_FLAG(WRITE_CACHE,	0x00200000)			\
 		/* Write Cache status is not available */	\
-	US_FLAG(NEEDS_CAP16,	0x00400000)
-		/* cannot handle READ_CAPACITY_10 */
+	US_FLAG(NEEDS_CAP16,	0x00400000)			\
+		/* cannot handle READ_CAPACITY_10 */		\
+	US_FLAG(IGNORE_UAS,	0x00800000)			\
+		/* Device advertises UAS but it is broken */
 
 #define US_FLAG(name, value)	US_FL_##name = value ,
 enum { US_DO_ALL_FLAGS };