diff options
| author | Philby John <pjohn@mvista.com> | 2010-03-26 17:07:51 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2010-04-13 09:46:55 +0200 |
| commit | b68b58fd6a341c2115ff5fb466fe9fc0b581980e (patch) | |
| tree | eaeaa1a7babed5ee4df999d99468eff79e68f2d1 /sound | |
| parent | ALSA: usb - Fix Oops after usb-midi disconnection (diff) | |
| download | linux-b68b58fd6a341c2115ff5fb466fe9fc0b581980e.tar.xz linux-b68b58fd6a341c2115ff5fb466fe9fc0b581980e.zip | |
ALSA: aaci - Fix alignment faults on ARM Cortex introduced by commit 29a4f2d3
The commit 29a4f2d3 used writel() at offset 0x26 which is
half-word aligned causing unaligned exceptions on a
Cortex-A8. The original patch solved the "aaci-pl041 fpga:04:
ac97 read back fail" issue on a soft reset. Reading from any
arbitrary aaci register seems to solve this issue.
Signed-off-by: Philby John <pjohn@mvista.com>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/arm/aaci.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/sound/arm/aaci.c b/sound/arm/aaci.c index 656e474dca47..91acc9a243ec 100644 --- a/sound/arm/aaci.c +++ b/sound/arm/aaci.c @@ -863,7 +863,6 @@ static int __devinit aaci_probe_ac97(struct aaci *aaci) struct snd_ac97 *ac97; int ret; - writel(0, aaci->base + AC97_POWERDOWN); /* * Assert AACIRESET for 2us */ @@ -1047,7 +1046,11 @@ static int __devinit aaci_probe(struct amba_device *dev, struct amba_id *id) writel(0x1fff, aaci->base + AACI_INTCLR); writel(aaci->maincr, aaci->base + AACI_MAINCR); - + /* + * Fix: ac97 read back fail errors by reading + * from any arbitrary aaci register. + */ + readl(aaci->base + AACI_CSCH1); ret = aaci_probe_ac97(aaci); if (ret) goto out; |