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authorTakashi Iwai <tiwai@suse.de>2017-02-01 17:24:02 +0100
committerTakashi Iwai <tiwai@suse.de>2017-02-03 17:35:07 +0100
commit8f8d1d7fe009c320d80ed1c7b0c1d3d48b538965 (patch)
tree5251eead3e47c2c1e1a042fcb8aa73ba5eb2339c /sound/x86/intel_hdmi_audio.h
parentbcce775ca8d66a5222ac2d28e5388b5a6c2d9ad6 (diff)
downloadop-kernel-dev-8f8d1d7fe009c320d80ed1c7b0c1d3d48b538965.zip
op-kernel-dev-8f8d1d7fe009c320d80ed1c7b0c1d3d48b538965.tar.gz
ALSA: x86: Fix racy access to chmap
The access to chmap can be racy against the hotplug process, where it recreates the chmap on the fly. For protecting against it, a mutex is introduced in this patch. It's also used for protecting the change / reference of eld and state fields, too. Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/x86/intel_hdmi_audio.h')
-rw-r--r--sound/x86/intel_hdmi_audio.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/sound/x86/intel_hdmi_audio.h b/sound/x86/intel_hdmi_audio.h
index 8b85a56..be24682 100644
--- a/sound/x86/intel_hdmi_audio.h
+++ b/sound/x86/intel_hdmi_audio.h
@@ -139,6 +139,7 @@ struct snd_intelhad {
void __iomem *mmio_start;
unsigned int had_config_offset;
struct work_struct hdmi_audio_wq;
+ struct mutex mutex; /* for protecting chmap, state and eld */
};
#endif /* _INTEL_HDMI_AUDIO_ */
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