Commit b3b34980 authored by Takashi Iwai's avatar Takashi Iwai Committed by Jiri Slaby

ALSA: ali5451: Fix out-of-bound position reporting

commit db685779 upstream.

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: default avatarEnrico Mioso <mrkiko.rs@gmail.com>
Tested-by: default avatarEnrico Mioso <mrkiko.rs@gmail.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarJiri Slaby <jslaby@suse.cz>
parent cf28bd0c
......@@ -1422,6 +1422,7 @@ snd_ali_playback_pointer(struct snd_pcm_substream *substream)
spin_unlock(&codec->reg_lock);
snd_ali_printk("playback pointer returned cso=%xh.\n", cso);
cso %= runtime->buffer_size;
return cso;
}
......@@ -1442,6 +1443,7 @@ 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;
}
......
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