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authorTakashi Iwai <tiwai@suse.de>2016-06-29 15:23:08 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-07-27 09:55:51 -0700
commitdbcbd279f7764feb9e8d1051b58caab8866b65b8 (patch)
treeb09456fdf549d8dcf7cf21330aad60886ed38e35
parent27948f9a2538670e669554270bb2d5021f99ce97 (diff)
ALSA: au88x0: Fix calculation in vortex_wtdma_bufshift()
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>
-rw-r--r--sound/pci/au88x0/au88x0_core.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/sound/pci/au88x0/au88x0_core.c b/sound/pci/au88x0/au88x0_core.c
index ae59dbaa53d9..42d4b13f1fa7 100644
--- a/sound/pci/au88x0/au88x0_core.c
+++ b/sound/pci/au88x0/au88x0_core.c
@@ -1442,9 +1442,8 @@ static int vortex_wtdma_bufshift(vortex_t * vortex, int wtdma)
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 {