diff options
| author | James C Georgas <jgeorgas@rogers.com> | 2006-12-07 08:10:57 +0100 |
|---|---|---|
| committer | Jaroslav Kysela <perex@server.perex.cz> | 2006-12-20 08:56:10 +0100 |
| commit | e8bb036a46ec4a9d748672f54a6b2d62c82b6fbd (patch) | |
| tree | 27fef55b23f193e1591c7fb67ec3918d0b71e067 | |
| parent | d5f6a38d9896614e2e78a82c6cb818721601c52f (diff) | |
[ALSA] ac97_codec - trivial fix for bit update functions
This patch fixes a couple of bit update functions in
alsa-kernel/pci/ac97/ac97_codec.c, which could possibly corrupt bits not
in the given mask.
Specifically, it'll clobber unset bits in the target that are not in the
mask, when the corresponding bit in the given new value is set.
Signed-off-by: James C Georgas <jgeorgas@rogers.com>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| -rw-r--r-- | sound/pci/ac97/ac97_codec.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sound/pci/ac97/ac97_codec.c b/sound/pci/ac97/ac97_codec.c index 7abcb10b275..91d8ceb4e9c 100644 --- a/sound/pci/ac97/ac97_codec.c +++ b/sound/pci/ac97/ac97_codec.c @@ -382,7 +382,7 @@ int snd_ac97_update_bits_nolock(struct snd_ac97 *ac97, unsigned short reg, unsigned short old, new; old = snd_ac97_read_cache(ac97, reg); - new = (old & ~mask) | value; + new = (old & ~mask) | (value & mask); change = old != new; if (change) { ac97->regs[reg] = new; @@ -399,7 +399,7 @@ static int snd_ac97_ad18xx_update_pcm_bits(struct snd_ac97 *ac97, int codec, uns mutex_lock(&ac97->page_mutex); old = ac97->spec.ad18xx.pcmreg[codec]; - new = (old & ~mask) | value; + new = (old & ~mask) | (value & mask); change = old != new; if (change) { mutex_lock(&ac97->reg_mutex); |