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| author | Werner Almesberger <werner@openmoko.org> | 2008-04-14 14:26:44 +0200 |
|---|---|---|
| committer | Jaroslav Kysela <perex@perex.cz> | 2008-05-19 17:55:10 +0200 |
| commit | 33e5b22285f63ede858c00456f3ffbc2ea79d6cf (patch) | |
| tree | 67ec525d50071e56cbaffdef3a0ea7dfe0b2ef57 | |
| parent | a65f0568f6cc8433877fb71dd7d36b551854b0bc (diff) | |
| download | kernel_samsung_tuna-33e5b22285f63ede858c00456f3ffbc2ea79d6cf.zip kernel_samsung_tuna-33e5b22285f63ede858c00456f3ffbc2ea79d6cf.tar.gz kernel_samsung_tuna-33e5b22285f63ede858c00456f3ffbc2ea79d6cf.tar.bz2 | |
[ALSA] soc - Fix s3c24xx-i2s LR sync while timer ticks are disabled
When timer ticks are disabled when calling
sound/soc/s3c24xx/s3c24xx-i2s.c:s3c24xx_snd_lrsync
and the LR signal never happens, we loop forever.
This has been observed in the following call chain:
snd_pcm_common_ioctl1 -> snd_pcm_action_lock_irq ->
snd_pcm_action_single
-> snd_pcm_do_resume -> soc_pcm_trigger -> s3c24xx_i2s_trigger
The patch below changes the timeout mechanism to use udelay, which
doesn't need timer ticks.
Signed-off-by: Werner Almesberger <werner@openmoko.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
| -rw-r--r-- | sound/soc/s3c24xx/s3c24xx-i2s.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sound/soc/s3c24xx/s3c24xx-i2s.c b/sound/soc/s3c24xx/s3c24xx-i2s.c index ddf8724..4c52f79 100644 --- a/sound/soc/s3c24xx/s3c24xx-i2s.c +++ b/sound/soc/s3c24xx/s3c24xx-i2s.c @@ -175,7 +175,7 @@ static void s3c24xx_snd_rxctrl(int on) static int s3c24xx_snd_lrsync(void) { u32 iiscon; - unsigned long timeout = jiffies + msecs_to_jiffies(5); + int timeout = 50; /* 5ms */ DBG("Entered %s\n", __func__); @@ -184,8 +184,9 @@ static int s3c24xx_snd_lrsync(void) if (iiscon & S3C2410_IISCON_LRINDEX) break; - if (time_after(jiffies, timeout)) + if (!timeout--) return -ETIMEDOUT; + udelay(100); } return 0; |