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authorClemens Ladisch <clemens@ladisch.de>2015-06-03 11:36:51 +0200
committerTakashi Iwai <tiwai@suse.de>2015-06-03 11:58:15 +0200
commitea114fc27dc0cb9a550b6add5426720feb66262a (patch)
tree5e105a6859798038204b1327738cd407f87a216f
parent044bddb9ca8d49edb91bc22b9940a463b0dbb97f (diff)
ALSA: usb-audio: fix missing input volume controls in MAYA44 USB(+)sound-4.1-rc7
The driver worked around an error in the MAYA44 USB(+)'s mixer unit descriptor by aborting before parsing the missing field. However, aborting parsing too early prevented parsing of the other units connected to this unit, so the capture mixer controls would be missing. Fix this by moving the check for this descriptor error after the parsing of the unit's input pins. Reported-by: nightmixes <nightmixes@gmail.com> Tested-by: nightmixes <nightmixes@gmail.com> Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
-rw-r--r--sound/usb/mixer.c9
1 files changed, 3 insertions, 6 deletions
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 4256fdedbd80..8b7e391dd0b8 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -1583,12 +1583,6 @@ static int parse_audio_mixer_unit(struct mixer_build *state, int unitid,
unitid);
return -EINVAL;
}
- /* no bmControls field (e.g. Maya44) -> ignore */
- if (desc->bLength <= 10 + input_pins) {
- usb_audio_dbg(state->chip, "MU %d has no bmControls field\n",
- unitid);
- return 0;
- }
num_ins = 0;
ich = 0;
@@ -1596,6 +1590,9 @@ static int parse_audio_mixer_unit(struct mixer_build *state, int unitid,
err = parse_audio_unit(state, desc->baSourceID[pin]);
if (err < 0)
continue;
+ /* no bmControls field (e.g. Maya44) -> ignore */
+ if (desc->bLength <= 10 + input_pins)
+ continue;
err = check_input_term(state, desc->baSourceID[pin], &iterm);
if (err < 0)
return err;