[ALSA] sound/pci: fix-up sleeping paths
ENS1370/1+ driver,ES1968 driver,Intel8x0 driver,VIA82xx driver
VIA82xx-modem driver,AC97 Codec,ALI5451 driver,CS46xx driver
MIXART driver,RME HDSP driver,Trident driver,YMFPCI driver
Description: Fix-up sleeping in sound/pci. These changes fall under the
following two categories:
1) Replace schedule_timeout() with msleep() to guarantee the
task delays as expected. This also involved replacing/removing
custom sleep functions.
2) Do not assume jiffies will only increment by one if you
request a 1 jiffy sleep, i.e. use time_after/time_before in
while loops.
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
diff --git a/sound/pci/via82xx.c b/sound/pci/via82xx.c
index 064972b..890582c 100644
--- a/sound/pci/via82xx.c
+++ b/sound/pci/via82xx.c
@@ -547,8 +547,7 @@
int err;
err = snd_via82xx_codec_ready(chip, ac97->num);
/* here we need to wait fairly for long time.. */
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(HZ/2);
+ msleep(500);
}
static void snd_via82xx_codec_write(ac97_t *ac97,
@@ -1847,7 +1846,7 @@
static int snd_via82xx_chip_init(via82xx_t *chip)
{
unsigned int val;
- int max_count;
+ unsigned long end_time;
unsigned char pval;
#if 0 /* broken on K7M? */
@@ -1889,14 +1888,14 @@
}
/* wait until codec ready */
- max_count = ((3 * HZ) / 4) + 1;
+ end_time = jiffies + msecs_to_jiffies(750);
do {
pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
break;
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(1);
- } while (--max_count > 0);
+ } while (time_before(jiffies, end_time));
if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)
snd_printk("AC'97 codec is not ready [0x%x]\n", val);
@@ -1905,7 +1904,7 @@
snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
VIA_REG_AC97_SECONDARY_VALID |
(VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
- max_count = ((3 * HZ) / 4) + 1;
+ end_time = jiffies + msecs_to_jiffies(750);
snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
VIA_REG_AC97_SECONDARY_VALID |
(VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
@@ -1916,7 +1915,7 @@
}
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(1);
- } while (--max_count > 0);
+ } while (time_before(jiffies, end_time));
/* This is ok, the most of motherboards have only one codec */
__ac97_ok2:
