[PATCH 4.4 04/20] ALSA: ppc/awacs: shut up maybe-uninitialized warning

From: Greg Kroah-Hartman
Date: Fri May 05 2017 - 14:35:46 EST

4.4-stable review patch. If anyone has any objections, please let me know.


From: Arnd Bergmann <arnd@xxxxxxxx>

commit b268c34e5ee92a4cc3099b0caaf26e6bfbdf0f18 upstream.

The awacs sound driver produces a false-positive warning in ppc64_defconfig:

sound/ppc/awacs.c: In function 'snd_pmac_awacs_init':
include/sound/control.h:219:9: warning: 'master_vol' may be used uninitialized in this function [-Wmaybe-uninitialized]

I haven't come up with a good way to rewrite the code to avoid the
warning, so here is a bad one: I initialize the variable before
the conditionall initialization so gcc no longer has to worry about

Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

sound/ppc/awacs.c | 1 +
1 file changed, 1 insertion(+)

--- a/sound/ppc/awacs.c
+++ b/sound/ppc/awacs.c
@@ -991,6 +991,7 @@ snd_pmac_awacs_init(struct snd_pmac *chi
if (err < 0)
return err;
+ master_vol = NULL;
if (pm7500)
err = build_mixers(chip,