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[ALSA] I2C fix for ice1724 

adding i2c busy wait before sending device address to prevent reading
bogus data.

Signed-off-by: Pavel Hofman <dustin@seznam.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Pavel Hofman 2007-12-03 12:37:17 +01:00 committed by Jaroslav Kysela
parent 109c53f840
commit acec30ffff
1 changed files with 1 additions and 0 deletions
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sound/pci/ice1712/ice1724.c
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@ -1958,6 +1958,7 @@ unsigned char snd_vt1724_read_i2c(struct snd_ice1712 *ice,
unsigned char val;
mutex_lock(&ice->i2c_mutex);
wait_i2c_busy(ice);
outb(addr, ICEREG1724(ice, I2C_BYTE_ADDR));
outb(dev & ~VT1724_I2C_WRITE, ICEREG1724(ice, I2C_DEV_ADDR));
wait_i2c_busy(ice);