Patch "usb: usbtest: Add timetout to simple_io()" has been added to the 3.10-stable tree

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This is a note to let you know that I've just added the patch titled

    usb: usbtest: Add timetout to simple_io()

to the 3.10-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     usb-usbtest-add-timetout-to-simple_io.patch
and it can be found in the queue-3.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From e5e4746510d140261918aecce2e5e3aa4456f7e9 Mon Sep 17 00:00:00 2001
From: Roger Quadros <rogerq@xxxxxx>
Date: Wed, 18 Dec 2013 15:40:10 +0530
Subject: usb: usbtest: Add timetout to simple_io()

From: Roger Quadros <rogerq@xxxxxx>

commit e5e4746510d140261918aecce2e5e3aa4456f7e9 upstream.

Without a timetout some tests e.g. test_halt() can remain stuck forever.

Signed-off-by: Roger Quadros <rogerq@xxxxxx>
Reviewed-by: Felipe Balbi <balbi@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/usb/misc/usbtest.c |   14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

--- a/drivers/usb/misc/usbtest.c
+++ b/drivers/usb/misc/usbtest.c
@@ -10,6 +10,7 @@
 #include <linux/timer.h>
 #include <linux/usb.h>
 
+#define SIMPLE_IO_TIMEOUT	10000	/* in milliseconds */
 
 /*-------------------------------------------------------------------------*/
 
@@ -366,6 +367,7 @@ static int simple_io(
 	int			max = urb->transfer_buffer_length;
 	struct completion	completion;
 	int			retval = 0;
+	unsigned long		expire;
 
 	urb->context = &completion;
 	while (retval == 0 && iterations-- > 0) {
@@ -378,9 +380,15 @@ static int simple_io(
 		if (retval != 0)
 			break;
 
-		/* NOTE:  no timeouts; can't be broken out of by interrupt */
-		wait_for_completion(&completion);
-		retval = urb->status;
+		expire = msecs_to_jiffies(SIMPLE_IO_TIMEOUT);
+		if (!wait_for_completion_timeout(&completion, expire)) {
+			usb_kill_urb(urb);
+			retval = (urb->status == -ENOENT ?
+				  -ETIMEDOUT : urb->status);
+		} else {
+			retval = urb->status;
+		}
+
 		urb->dev = udev;
 		if (retval == 0 && usb_pipein(urb->pipe))
 			retval = simple_check_buf(tdev, urb);


Patches currently in stable-queue which might be from rogerq@xxxxxx are

queue-3.10/usb-usbtest-add-timetout-to-simple_io.patch
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