WSL2-Linux-Kernel/sound/pci/ac97
Su Hui 53abafedfe ALSA: ac97: Fix possible error value of *rac97
[ Upstream commit 67de40c9df ]

Before committing 79597c8bf6, *rac97 always be NULL if there is
an error. When error happens, make sure *rac97 is NULL is safer.

For examble, in snd_vortex_mixer():
	err = snd_ac97_mixer(pbus, &ac97, &vortex->codec);
	vortex->isquad = ((vortex->codec == NULL) ?
		0 : (vortex->codec->ext_id&0x80));
If error happened but vortex->codec isn't NULL, this may cause some
problems.

Move the judgement order to be clearer and better.

Fixes: 79597c8bf6 ("ALSA: ac97: Fix possible NULL dereference in snd_ac97_mixer")
Suggested-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Su Hui <suhui@nfschina.com>
Link: https://lore.kernel.org/r/20230823025212.1000961-1-suhui@nfschina.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-09-19 12:22:40 +02:00
..
Makefile
ac97_codec.c ALSA: ac97: Fix possible error value of *rac97 2023-09-19 12:22:40 +02:00
ac97_id.h
ac97_local.h
ac97_patch.c ALSA: ac97: Fix assignment in if condition 2021-06-09 17:30:02 +02:00
ac97_patch.h
ac97_pcm.c
ac97_proc.c