[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/ac97/ac97_codec.c b/sound/pci/ac97/ac97_codec.c
index 0677d41..94cd989 100644
--- a/sound/pci/ac97/ac97_codec.c
+++ b/sound/pci/ac97/ac97_codec.c
@@ -2227,6 +2227,7 @@
void snd_ac97_resume(ac97_t *ac97)
{
int i;
+ unsigned long end_time;
if (ac97->bus->ops->reset) {
ac97->bus->ops->reset(ac97);
@@ -2244,26 +2245,26 @@
snd_ac97_write(ac97, AC97_POWERDOWN, ac97->regs[AC97_POWERDOWN]);
if (ac97_is_audio(ac97)) {
ac97->bus->ops->write(ac97, AC97_MASTER, 0x8101);
- for (i = HZ/10; i >= 0; i--) {
+ end_time = jiffies + msecs_to_jiffies(100);
+ do {
if (snd_ac97_read(ac97, AC97_MASTER) == 0x8101)
break;
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(1);
- }
+ } while (time_after_eq(end_time, jiffies));
/* FIXME: extra delay */
ac97->bus->ops->write(ac97, AC97_MASTER, 0x8000);
- if (snd_ac97_read(ac97, AC97_MASTER) != 0x8000) {
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(HZ/4);
- }
+ if (snd_ac97_read(ac97, AC97_MASTER) != 0x8000)
+ msleep(250);
} else {
- for (i = HZ/10; i >= 0; i--) {
+ end_time = jiffies + msecs_to_jiffies(100);
+ do {
unsigned short val = snd_ac97_read(ac97, AC97_EXTENDED_MID);
if (val != 0xffff && (val & 1) != 0)
break;
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(1);
- }
+ } while (time_after_eq(end_time, jiffies));
}
__reset_ready: