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| /openbmc/linux/sound/x86/ |
| H A D | intel_hdmi_audio.h | diff 313d9f28c1d5e0254ca16f2df0f1b737e30c0993 Thu Feb 02 06:00:12 CST 2017 Takashi Iwai <tiwai@suse.de> ALSA: x86: Properly manage PCM substream lifetype
The PCM substream is referred not only in the PCM callbacks but also
in the irq handler and in the hotplug/unplug codes. The latter code
paths don't take the PCM lock, thus the PCM may be released
unexpectedly while calling PCM helper functions or accessing
pcm->runtime fields.
This patch implements a simple refcount to assure the PCM substream
accessibility while the other codes are accessing. It needed some
code refactoring in the relevant functions for avoiding the doubly
spinlocks.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
|
| H A D | intel_hdmi_audio.c | diff 313d9f28c1d5e0254ca16f2df0f1b737e30c0993 Thu Feb 02 06:00:12 CST 2017 Takashi Iwai <tiwai@suse.de> ALSA: x86: Properly manage PCM substream lifetype
The PCM substream is referred not only in the PCM callbacks but also
in the irq handler and in the hotplug/unplug codes. The latter code
paths don't take the PCM lock, thus the PCM may be released
unexpectedly while calling PCM helper functions or accessing
pcm->runtime fields.
This patch implements a simple refcount to assure the PCM substream
accessibility while the other codes are accessing. It needed some
code refactoring in the relevant functions for avoiding the doubly
spinlocks.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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