When CONFIG_SND_JACK is disabled, the hdmi driver tries to create a new output jack structure and dereferences it even though the pointer is never assigned:
sound/pci/hda/patch_hdmi.c: In function 'generic_hdmi_build_jack': sound/pci/hda/patch_hdmi.c:2534:30: error: 'jack' may be used uninitialized in this function [-Werror=maybe-uninitialized] sound/pci/hda/patch_hdmi.c:2526:19: note: 'jack' was declared here
This makes snd_jack_new() return an error when SND_JACK is disabled, forcing all users to handle errors gracefully and avoiding the problem in all callers that correctly check the return code.
Signed-off-by: Arnd Bergmann arnd@arndb.de Fixes: 788d441a164c ("ALSA: hda - Use component ops for i915 HDMI/DP audio jack handling") --- include/sound/jack.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/sound/jack.h b/include/sound/jack.h index 23bede121c78..1e84a2e413f8 100644 --- a/include/sound/jack.h +++ b/include/sound/jack.h @@ -99,7 +99,7 @@ void snd_jack_report(struct snd_jack *jack, int status); static inline int snd_jack_new(struct snd_card *card, const char *id, int type, struct snd_jack **jack, bool initial_kctl, bool phantom_jack) { - return 0; + return -ENXIO; }
static inline int snd_jack_add_new_kctl(struct snd_jack *jack, const char * name, int mask)