Messages in this thread Patch in this message |  | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.4 03/21] ALSA: ali5451: Fix out-of-bound position reporting | Date | Fri, 14 Oct 2016 13:40:41 +0200 |
| |
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Takashi Iwai <tiwai@suse.de>
commit db68577966abc1aeae4ec597b3dcfa0d56e92041 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: Enrico Mioso <mrkiko.rs@gmail.com> Tested-by: Enrico Mioso <mrkiko.rs@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- sound/pci/ali5451/ali5451.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/sound/pci/ali5451/ali5451.c +++ b/sound/pci/ali5451/ali5451.c @@ -1408,6 +1408,7 @@ snd_ali_playback_pointer(struct snd_pcm_ 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 cso = inw(ALI_REG(codec, ALI_CSO_ALPHA_FMS + 2)); spin_unlock(&codec->reg_lock); + cso %= runtime->buffer_size; return cso; }
|  |