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| author | Takashi Iwai <tiwai@suse.de> | 2013-01-15 14:44:41 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2013-01-15 14:55:16 +0100 |
| commit | 6f54c361329dbb67dac9de174e938992651d12d7 (patch) | |
| tree | 1e43ed773dbdbeb9fda80e5b9f83797f8b82ea40 | |
| parent | 2e4c4dbed0d320294a49c081b14e58a349ac19ae (diff) | |
| download | linux-3.10-6f54c361329dbb67dac9de174e938992651d12d7.tar.gz linux-3.10-6f54c361329dbb67dac9de174e938992651d12d7.tar.bz2 linux-3.10-6f54c361329dbb67dac9de174e938992651d12d7.zip | |
ALSA: hda/hdmi - Work around "alsactl restore" errors
When "alsactl restore" is performed on HDMI codecs, it tries to
restore the channel map value since the channel map controls are
writable. But hdmi_chmap_ctl_put() returns -EBADFD when no PCM stream
is assigned yet, and this results in an error message from alsactl.
Although the error is harmless, it's certainly ugly and can be
regarded as a regression.
As a workaround, this patch changes the return code in such a case to
be zero for making others happy. (A slight excuse is: when the chmap
is changed through the proper alsa-lib API, the PCM status is checked
there anyway, so we don't have to be too strict in the kernel side.)
Cc: <stable@vger.kernel.org> [v3.7+]
Signed-off-by: Takashi Iwai <tiwai@suse.de>
| -rw-r--r-- | sound/pci/hda/patch_hdmi.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index b6c21ea187c..807a2aa1ff3 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -1502,7 +1502,7 @@ static int hdmi_chmap_ctl_put(struct snd_kcontrol *kcontrol, ctl_idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); substream = snd_pcm_chmap_substream(info, ctl_idx); if (!substream || !substream->runtime) - return -EBADFD; + return 0; /* just for avoiding error from alsactl restore */ switch (substream->runtime->status->state) { case SNDRV_PCM_STATE_OPEN: case SNDRV_PCM_STATE_SETUP: |