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| author | Takashi Iwai <tiwai@suse.de> | 2015-06-11 12:02:49 (GMT) |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2015-06-11 12:02:49 (GMT) |
| commit | a457782a1c694c5c84dac55c9a77789dd741a7e5 (patch) | |
| tree | 2e870d36cbf154652b38b6d7ee639d0b982cb397 /sound/pci | |
| parent | df203a4e46f4cd8cd9f58e926bea462006f9b3a6 (diff) | |
| download | linux-a457782a1c694c5c84dac55c9a77789dd741a7e5.tar.xz | |
ALSA: hda - Fix link power unbalance at device removal
snd_hdac_link_power() has to be called after unregistering the codec
device. Otherwise the device might be already runtime-suspended, thus
the refcount goes under zero, triggering a warning like:
WARNING: CPU: 7 PID: 2014 at sound/hda/hdac_i915.c:63 snd_hdac_display_power+0x106/0x120 [snd_hda_core]()
CPU: 7 PID: 2014 Comm: modprobe Not tainted 4.1.0-rc7-test+ #1
Call Trace:
[<ffffffff81697fe3>] dump_stack+0x4c/0x6e
[<ffffffff810696da>] warn_slowpath_common+0x8a/0xc0
[<ffffffff810697ca>] warn_slowpath_null+0x1a/0x20
[<ffffffffa02dd526>] snd_hdac_display_power+0x106/0x120 [snd_hda_core]
[<ffffffffa030b422>] azx_intel_link_power+0x12/0x20 [snd_hda_intel]
[<ffffffffa037139f>] azx_link_power+0x1f/0x30 [snd_hda_codec]
[<ffffffffa02d89fe>] snd_hdac_link_power+0x2e/0x40 [snd_hda_core]
[<ffffffffa0368524>] snd_hda_codec_dev_free+0x34/0x50 [snd_hda_codec]
[<ffffffffa0252061>] __snd_device_free+0x51/0xa0 [snd]
.....
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci')
| -rw-r--r-- | sound/pci/hda/hda_codec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index d702298..497bd0f 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -886,8 +886,8 @@ static int snd_hda_codec_dev_free(struct snd_device *device) struct hda_codec *codec = device->device_data; codec->in_freeing = 1; - snd_hdac_link_power(&codec->core, false); snd_hdac_device_unregister(&codec->core); + snd_hdac_link_power(&codec->core, false); put_device(hda_codec_dev(codec)); return 0; } |