Patch "ALSA: au88x0: Fix calculation in vortex_wtdma_bufshift()" has been added to the 3.14-stable tree

Patch "ALSA: au88x0: Fix calculation in vortex_wtdma_bufshift()" has been added to the 3.14-stable tree

[gregkh]

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

    ALSA: au88x0: Fix calculation in vortex_wtdma_bufshift()

to the 3.14-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:
     alsa-au88x0-fix-calculation-in-vortex_wtdma_bufshift.patch
and it can be found in the queue-3.14 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 62db7152c924e4c060e42b34a69cd39658e8a0dc Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Wed, 29 Jun 2016 15:23:08 +0200
Subject: ALSA: au88x0: Fix calculation in vortex_wtdma_bufshift()

From: Takashi Iwai <tiwai@suse.de>

commit 62db7152c924e4c060e42b34a69cd39658e8a0dc upstream.

vortex_wtdma_bufshift() function does calculate the page index
wrongly, first masking then shift, which always results in zero.
The proper computation is to first shift, then mask.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 sound/pci/au88x0/au88x0_core.c |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

--- a/sound/pci/au88x0/au88x0_core.c
+++ b/sound/pci/au88x0/au88x0_core.c
@@ -1442,9 +1442,8 @@ static int vortex_wtdma_bufshift(vortex_
 	int page, p, pp, delta, i;
 
 	page =
-	    (hwread(vortex->mmio, VORTEX_WTDMA_STAT + (wtdma << 2)) &
-	     WT_SUBBUF_MASK)
-	    >> WT_SUBBUF_SHIFT;
+	    (hwread(vortex->mmio, VORTEX_WTDMA_STAT + (wtdma << 2))
+	     >> WT_SUBBUF_SHIFT) & WT_SUBBUF_MASK;
 	if (dma->nr_periods >= 4)
 		delta = (page - dma->period_real) & 3;
 	else {


Patches currently in stable-queue which might be from tiwai@suse.de are

queue-3.14/alsa-ctl-stop-notification-after-disconnection.patch
queue-3.14/alsa-dummy-fix-a-use-after-free-at-closing.patch
queue-3.14/alsa-au88x0-fix-calculation-in-vortex_wtdma_bufshift.patch