[ALSA] cs4231-lib: improved waiting after mce_down

This patch replaces long msleeps in waiting loops
with schedule_timeout() calls.

Signed-off-by: Krzysztof Helt <krzysztof.h1 at wp.pl>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 13 insertions, 10 deletions

diff --git a/sound/isa/cs423x/cs4231_lib.c b/sound/isa/cs423x/cs4231_lib.c
index c0ffb20da996..e73554feccd5 100644
--- a/sound/isa/cs423x/cs4231_lib.c
+++ b/sound/isa/cs423x/cs4231_lib.c
@@ -343,26 +343,29 @@ void snd_cs4231_mce_down(struct snd_cs4231 *chip)
 
         snd_printdd("(1) jiffies = %lu\n", jiffies);
 
-        /* in 10 ms increments, check condition, up to 250 ms */
-        timeout = 25;
-        while (snd_cs4231_in(chip, CS4231_TEST_INIT) & CS4231_CALIB_IN_PROGRESS) {
-                if (--timeout < 0) {
-                        snd_printk("mce_down - auto calibration time out (2)\n");
+        /* check condition up to 250 ms */
+        timeout = msecs_to_jiffies(250);
+        while (snd_cs4231_in(chip, CS4231_TEST_INIT) &
+                CS4231_CALIB_IN_PROGRESS) {
+
+                if (timeout <= 0) {
+                        snd_printk(KERN_ERR "mce_down - "
+                                        "auto calibration time out (2)\n");
                         return;
                 }
-                msleep(10);
+                timeout = schedule_timeout(timeout);
         }
 
         snd_printdd("(2) jiffies = %lu\n", jiffies);
 
-        /* in 10 ms increments, check condition, up to 100 ms */
-        timeout = 10;
+        /* check condition up to 100 ms */
+        timeout = msecs_to_jiffies(100);
         while (cs4231_inb(chip, CS4231P(REGSEL)) & CS4231_INIT) {
-                if (--timeout < 0) {
+                if (timeout <= 0) {
                         snd_printk(KERN_ERR "mce_down - auto calibration time out (3)\n");
                         return;
                 }
-                msleep(10);
+                timeout = schedule_timeout(timeout);
         }
 
         snd_printdd("(3) jiffies = %lu\n", jiffies);