Patch "usb: misc: usbtest: fix pattern tests for scatterlists." has been added to the 4.4-stable tree

Patch "usb: misc: usbtest: fix pattern tests for scatterlists." has been added to the 4.4-stable tree

[gregkh]

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

    usb: misc: usbtest: fix pattern tests for scatterlists.

to the 4.4-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-misc-usbtest-fix-pattern-tests-for-scatterlists.patch
and it can be found in the queue-4.4 subdirectory.

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


>From cdc77c82a8286b1181b81b6e5ef60c8e83ded7bc Mon Sep 17 00:00:00 2001
From: Mathias Nyman <mathias.nyman@linux.intel.com>
Date: Mon, 2 May 2016 11:39:03 +0300
Subject: usb: misc: usbtest: fix pattern tests for scatterlists.

From: Mathias Nyman <mathias.nyman@linux.intel.com>

commit cdc77c82a8286b1181b81b6e5ef60c8e83ded7bc upstream.

The current implemenentation restart the sent pattern for each entry in
the sg list. The receiving end expects a continuous pattern, and test
will fail unless scatterilst entries happen to be aligned with the
pattern

Fix this by calculating the pattern byte based on total sent size
instead of just the current sg entry.

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Fixes: 8b5249019352 ("[PATCH] USB: usbtest: scatterlist OUT data pattern testing")
Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/misc/usbtest.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/usb/misc/usbtest.c
+++ b/drivers/usb/misc/usbtest.c
@@ -505,6 +505,7 @@ static struct scatterlist *
 alloc_sglist(int nents, int max, int vary, struct usbtest_dev *dev, int pipe)
 {
 	struct scatterlist	*sg;
+	unsigned int		n_size = 0;
 	unsigned		i;
 	unsigned		size = max;
 	unsigned		maxpacket =
@@ -537,7 +538,8 @@ alloc_sglist(int nents, int max, int var
 			break;
 		case 1:
 			for (j = 0; j < size; j++)
-				*buf++ = (u8) ((j % maxpacket) % 63);
+				*buf++ = (u8) (((j + n_size) % maxpacket) % 63);
+			n_size += size;
 			break;
 		}
 


Patches currently in stable-queue which might be from mathias.nyman@linux.intel.com are

queue-4.4/usb-misc-usbtest-fix-pattern-tests-for-scatterlists.patch