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| author | Takashi Iwai <tiwai@suse.de> | 2017-02-02 13:00:12 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2017-02-03 17:36:13 +0100 |
| commit | 313d9f28c1d5e0254ca16f2df0f1b737e30c0993 (patch) | |
| tree | f028fc66be246aa44c34f016ad7af7d0e7791ffe /tools/perf/scripts/python | |
| parent | ALSA: x86: Drop unused fields from pcm_stream_info (diff) | |
| download | linux-313d9f28c1d5e0254ca16f2df0f1b737e30c0993.tar.gz linux-313d9f28c1d5e0254ca16f2df0f1b737e30c0993.zip | |
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>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions