ALSA: hda - Don't register a cb func if it is registered already

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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>

...

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Hui Wang 2020-09-30 13:51:46 +08:00 • committed by Takashi Iwai

parent 13468bfa8c

commit f4794c6064

1 changed files with 13 additions and 1 deletions

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14

sound/pci/hda/hda_jack.c

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