From: Pavel Hofman <dustin@seznam.cz>
Date: Mon, 3 Dec 2007 11:37:17 +0000 (+0100)
Subject: [ALSA] I2C fix for ice1724
X-Git-Tag: Ubuntu-goldfish-3.4.0-4.27~21081^2~216
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=acec30ffffe1eee07e3202cff03e7ca8350d250f;p=mirror_ubuntu-zesty-kernel.git

[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>
---

diff --git a/sound/pci/ice1712/ice1724.c b/sound/pci/ice1712/ice1724.c
index 357bdbe21c8f..b7a1d93cf002 100644
--- a/sound/pci/ice1712/ice1724.c
+++ b/sound/pci/ice1712/ice1724.c
@@ -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);