From: Andreas Schwab <schwab@linux-m68k.org>
Date: Sat, 11 Sep 2010 11:16:41 +0000 (+0200)
Subject: ALSA: sound/ppc/powermac: remove undefined operations
X-Git-Tag: firefly_0821_release~7613^2~3382^2~37^2~37
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=7b6c3a34e93aafc5dd9adc7dee87c7fa61d8bdbb;p=firefly-linux-kernel-4.4.55.git

ALSA: sound/ppc/powermac: remove undefined operations

Modifying an object twice without an intervening sequence point is
undefined.

Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

diff --git a/sound/ppc/tumbler.c b/sound/ppc/tumbler.c
index 20afdf9772ee..961d98297695 100644
--- a/sound/ppc/tumbler.c
+++ b/sound/ppc/tumbler.c
@@ -785,7 +785,7 @@ static int snapper_set_capture_source(struct pmac_tumbler *mix)
 	if (! mix->i2c.client)
 		return -ENODEV;
 	if (mix->capture_source)
-		mix->acs = mix->acs |= 2;
+		mix->acs |= 2;
 	else
 		mix->acs &= ~2;
 	return i2c_smbus_write_byte_data(mix->i2c.client, TAS_REG_ACS, mix->acs);