[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>

1 files changed, 6 insertions, 7 deletions

diff --git a/sound/pci/via82xx.c b/sound/pci/via82xx.c
index 064972b14d00..890582ce874d 100644
--- a/sound/pci/via82xx.c
+++ b/sound/pci/via82xx.c
@@ -547,8 +547,7 @@ static void snd_via82xx_codec_wait(ac97_t *ac97)
         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 void __devinit snd_via82xx_proc_init(via82xx_t *chip)
 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 @@ static int snd_via82xx_chip_init(via82xx_t *chip)
         }
 
         /* 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 @@ static int snd_via82xx_chip_init(via82xx_t *chip)
         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 @@ static int snd_via82xx_chip_init(via82xx_t *chip)
                 }
                 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: