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authorTakashi Iwai <tiwai@suse.de>2013-01-15 14:44:41 +0100
committerTakashi Iwai <tiwai@suse.de>2013-01-15 14:55:16 +0100
commit6f54c361329dbb67dac9de174e938992651d12d7 (patch)
tree1e43ed773dbdbeb9fda80e5b9f83797f8b82ea40
parent2e4c4dbed0d320294a49c081b14e58a349ac19ae (diff)
downloadlinux-stericsson-6f54c361329dbb67dac9de174e938992651d12d7.tar.gz
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.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index b6c21ea187ca..807a2aa1ff38 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: