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| author | David Henningsson <david.henningsson@canonical.com> | 2015-04-01 12:43:00 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2015-04-04 12:14:00 +0200 |
| commit | ffda568e8b4979c6a04bbdd92acfd93b5dc5e163 (patch) | |
| tree | cc347e669ec761e23635a731ba614344d473a0c1 /sound/hda/hdac_device.c | |
| parent | 4738465c37298cd9228750f7e16aad88af8495c5 (diff) | |
| download | linux-ffda568e8b4979c6a04bbdd92acfd93b5dc5e163.tar.bz2 | |
ALSA: hda - Fix subsystem ID read regression
A regression was introduced in 7639a06c23c7d4cda3: if AC_PAR_SUBSYSTEM_ID
reads as zero, one should retry using AC_VERB_GET_SUBSYSTEM_ID.
This seems to hit many codecs (my own laptop included), and causes
quirks for some machines not to apply correctly.
Reported-by: TienFu Chen <tienfu.chen@canonical.com>
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/hda/hdac_device.c')
| -rw-r--r-- | sound/hda/hdac_device.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/hda/hdac_device.c b/sound/hda/hdac_device.c index 6e8ee1d6974a..53b6b95ff8cd 100644 --- a/sound/hda/hdac_device.c +++ b/sound/hda/hdac_device.c @@ -91,7 +91,7 @@ int snd_hdac_device_init(struct hdac_device *codec, struct hdac_bus *bus, codec->power_caps = snd_hdac_read_parm(codec, fg, AC_PAR_POWER_STATE); /* reread ssid if not set by parameter */ - if (codec->subsystem_id == -1) + if (codec->subsystem_id == -1 || codec->subsystem_id == 0) snd_hdac_read(codec, fg, AC_VERB_GET_SUBSYSTEM_ID, 0, &codec->subsystem_id); |