diff options
| author | Cezary Rojewski <cezary.rojewski@intel.com> | 2022-07-06 14:02:24 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2022-07-09 18:37:25 +0200 |
| commit | 9c76958b396a1342f08f205c350447b4bb54b26a (patch) | |
| tree | ae1e24b7fef5c26ebd89e7c694a1e1ecec19d39c /sound/pci | |
| parent | 0fcc43e2e159f2f609686a5339093177f019ae26 (diff) | |
ALSA: hda: Make device usage_count consistent across subsequent probing
AVS HDAudio bus driver does not tie with codec drivers tighly and
snd_hda_codec_device_new() can be called after codec's module reload. In
such case, rpm is forbidden and invoking pm_runtime_forbid()
unconditionally causes device's usage_count to become unbalanced. This
is later caught by WARN_ON() found in sound/soc/hda.c. Detect such
circumstance and bump the usage_count instead.
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20220706120230.427296-4-cezary.rojewski@intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci')
| -rw-r--r-- | sound/pci/hda/hda_codec.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 7579a6982f47..018067addd86 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -1045,8 +1045,14 @@ int snd_hda_codec_device_new(struct hda_bus *bus, struct snd_card *card, goto error; } +#ifdef CONFIG_PM /* PM runtime needs to be enabled later after binding codec */ - pm_runtime_forbid(&codec->core.dev); + if (codec->core.dev.power.runtime_auto) + pm_runtime_forbid(&codec->core.dev); + else + /* Keep the usage_count consistent across subsequent probing */ + pm_runtime_get_noresume(&codec->core.dev); +#endif return 0; |