diff options
| author | David Henningsson <david.henningsson@canonical.com> | 2013-02-19 16:11:25 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2013-02-19 18:28:30 +0100 |
| commit | 4bd038f9d80216a6e95c5c36fae5054a83ea75d7 (patch) | |
| tree | a2347fc3bb5bdbb84527858956667b9d9882ba0c /sound/pci/hda/hda_local.h | |
| parent | 1613d6b46b433f07f1d2703e4bd102802dcd75a4 (diff) | |
ALSA: hda - hdmi: Protect ELD buffer
Because the eld buffer can be simultaneously accessed from both
workqueue context (updating) and process context (kcontrol read),
we need to protect it with a mutex to guarantee consistency.
To avoid holding the mutex while reading the ELD info from the
codec, we introduce a temporary eld buffer.
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/hda/hda_local.h')
| -rw-r--r-- | sound/pci/hda/hda_local.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_local.h b/sound/pci/hda/hda_local.h index 363cd487266..83b7486c8ef 100644 --- a/sound/pci/hda/hda_local.h +++ b/sound/pci/hda/hda_local.h @@ -739,6 +739,7 @@ struct hdmi_eld { int eld_size; char eld_buffer[ELD_MAX_SIZE]; struct parsed_hdmi_eld info; + struct mutex lock; #ifdef CONFIG_PROC_FS struct snd_info_entry *proc_entry; #endif |