mmc: Fix mmc_delay() function

Several fixes for mmc_delay():

 * Repair if-clause that was supposed to detect sub-hz delays.
 * Change yield() to cond_resched() as yield() no longer has the
   semantics we desire.
 * mmc_delay() is used to guarantee protocol delays, so we cannot
   return early (i.e. use _interruptable).

Based on patch by Amol Lad.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 1593a6a632cf..82b7643c1654 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -454,11 +454,11 @@ static void mmc_deselect_cards(struct mmc_host *host)
 
 static inline void mmc_delay(unsigned int ms)
 {
-        if (ms < HZ / 1000) {
-                yield();
+        if (ms < 1000 / HZ) {
+                cond_resched();
                 mdelay(ms);
         } else {
-                msleep_interruptible (ms);
+                msleep(ms);
         }
 }