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authorTakashi Iwai <tiwai@suse.de>2016-09-21 14:38:02 +0200
committerTakashi Iwai <tiwai@suse.de>2016-09-21 14:38:02 +0200
commitdb68577966abc1aeae4ec597b3dcfa0d56e92041 (patch)
tree564e5e767f3cb22620ba0902562973957a4bd063 /sound/pci/ali5451
parent3f640970a41429f0a076c01270bbd014c9eae61c (diff)
downloadlinux-db68577966abc1aeae4ec597b3dcfa0d56e92041.tar.bz2
ALSA: ali5451: Fix out-of-bound position reporting
The pointer callbacks of ali5451 driver may return the value at the boundary occasionally, and it results in the kernel warning like snd_ali5451 0000:00:06.0: BUG: , pos = 16384, buffer size = 16384, period size = 1024 It seems that folding the position offset is enough for fixing the warning and no ill-effect has been seen by that. Reported-by: Enrico Mioso <mrkiko.rs@gmail.com> Tested-by: Enrico Mioso <mrkiko.rs@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/ali5451')
-rw-r--r--sound/pci/ali5451/ali5451.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/sound/pci/ali5451/ali5451.c b/sound/pci/ali5451/ali5451.c
index 36470af7eda7..92b819e4f729 100644
--- a/sound/pci/ali5451/ali5451.c
+++ b/sound/pci/ali5451/ali5451.c
@@ -1408,6 +1408,7 @@ snd_ali_playback_pointer(struct snd_pcm_substream *substream)
spin_unlock(&codec->reg_lock);
dev_dbg(codec->card->dev, "playback pointer returned cso=%xh.\n", cso);
+ cso %= runtime->buffer_size;
return cso;
}
@@ -1428,6 +1429,7 @@ static snd_pcm_uframes_t snd_ali_pointer(struct snd_pcm_substream *substream)
cso = inw(ALI_REG(codec, ALI_CSO_ALPHA_FMS + 2));
spin_unlock(&codec->reg_lock);
+ cso %= runtime->buffer_size;
return cso;
}