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| author | Hui Wang <hui.wang@canonical.com> | 2020-09-30 13:51:46 +0800 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2020-09-30 12:56:32 +0200 |
| commit | f4794c6064a83d2c57b264bd299c367d172d1044 (patch) | |
| tree | 91119f8e7ee2cd196e5eb57ceb9785ab96e672a0 /Documentation/trace/histogram.rst | |
| parent | 13468bfa8c58731dc9ecda1cd9b22a191114f944 (diff) | |
| download | lwn-f4794c6064a83d2c57b264bd299c367d172d1044.tar.gz lwn-f4794c6064a83d2c57b264bd299c367d172d1044.zip | |
ALSA: hda - Don't register a cb func if it is registered already
If the caller of enable_callback_mst() passes a cb func, the callee
function will malloc memory and link this cb func to the list
unconditionally. This will introduce problem if caller is in the
hda_codec_ops.init() since the init() will be repeatedly called in the
codec rt_resume().
So far, the patch_hdmi.c and patch_ca0132.c call enable_callback_mst()
in the hda_codec_ops.init().
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200930055146.5665-1-hui.wang@canonical.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'Documentation/trace/histogram.rst')
0 files changed, 0 insertions, 0 deletions