[ALSA] hda-codec - Make the mixer capability check more robust

In some cases, mixer elements return -EINVAL because it couldn't
obtain proper amp_cap bits.  The patch improves the robustness,
trying the amp_cap query again in such a case.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 2 insertions, 1 deletions

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 14649d54b493..8e89d56b6400 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -707,7 +707,8 @@ static u32 query_amp_caps(struct hda_codec *codec, hda_nid_t nid, int direction)
                                                     direction == HDA_OUTPUT ?
                                                     AC_PAR_AMP_OUT_CAP :
                                                     AC_PAR_AMP_IN_CAP);
-                info->status |= INFO_AMP_CAPS;
+                if (info->amp_caps)
+                        info->status |= INFO_AMP_CAPS;
         }
         return info->amp_caps;
 }