diff options
| author | Richard Fitzgerald <rf@opensource.cirrus.com> | 2024-08-26 12:49:40 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2024-08-26 13:03:57 +0300 |
| commit | 28b329f431cef840fddd9a9b493bc3eff1aa06c0 (patch) | |
| tree | 345482ffdc6f76579e86ff4681a6a523da239e45 /sound | |
| parent | 2dc43c5e212036458ed7c5586fb82ee183fee504 (diff) | |
| download | linux-28b329f431cef840fddd9a9b493bc3eff1aa06c0.tar.xz | |
ALSA: hda: hda_component: Fix mutex crash if nothing ever binds
Move the initialization of parent->mutex into
hda_component_manager_init() so that it is always valid.
In hda_component_manager_bind() do not clear the parent information.
Only zero-fill the per-component data ready for it to be filled in
by the components as they bind.
Previously parent->mutex was being initialized only in
hda_component_manager_bind(). This meant that it was only
initialized if all components appeared and there was a bind callback.
If there wasn't a bind the mutex object was not valid when the
Realtek driver called any of the other functions.
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Fixes: 047b9cbbaa8e ("ALSA: hda: hda_component: Protect shared data with a mutex")
Link: https://patch.msgid.link/20240826094940.45563-1-rf@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/pci/hda/hda_component.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sound/pci/hda/hda_component.c b/sound/pci/hda/hda_component.c index 7b19cb38b4e0..b7dfdb10d156 100644 --- a/sound/pci/hda/hda_component.c +++ b/sound/pci/hda/hda_component.c @@ -141,8 +141,7 @@ int hda_component_manager_bind(struct hda_codec *cdc, int ret; /* Init shared and component specific data */ - memset(parent, 0, sizeof(*parent)); - mutex_init(&parent->mutex); + memset(parent->comps, 0, sizeof(parent->comps)); parent->codec = cdc; mutex_lock(&parent->mutex); @@ -164,6 +163,8 @@ int hda_component_manager_init(struct hda_codec *cdc, struct hda_scodec_match *sm; int ret, i; + mutex_init(&parent->mutex); + for (i = 0; i < count; i++) { sm = devm_kmalloc(dev, sizeof(*sm), GFP_KERNEL); if (!sm) |