[MMC] Allow detection/removal to be delayed

Change mmc_detect_change() to take a delay argument such that
the detection of card insertions and removals can be delayed
according to the requirements of the host driver or platform.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 8 insertions, 4 deletions

diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 0a117c61cd18..ceae379a4d4c 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -1079,13 +1079,17 @@ static void mmc_setup(struct mmc_host *host)
 /**
  *      mmc_detect_change - process change of state on a MMC socket
  *      @host: host which changed state.
+ *      @delay: optional delay to wait before detection (jiffies)
  *
  *      All we know is that card(s) have been inserted or removed
  *      from the socket(s).  We don't know which socket or cards.
  */
-void mmc_detect_change(struct mmc_host *host)
+void mmc_detect_change(struct mmc_host *host, unsigned long delay)
 {
-        schedule_work(&host->detect);
+        if (delay)
+                schedule_delayed_work(&host->detect, delay);
+        else
+                schedule_work(&host->detect);
 }
 
 EXPORT_SYMBOL(mmc_detect_change);
@@ -1189,7 +1193,7 @@ int mmc_add_host(struct mmc_host *host)
         ret = mmc_add_host_sysfs(host);
         if (ret == 0) {
                 mmc_power_off(host);
-                mmc_detect_change(host);
+                mmc_detect_change(host, 0);
         }
 
         return ret;
@@ -1259,7 +1263,7 @@ EXPORT_SYMBOL(mmc_suspend_host);
  */
 int mmc_resume_host(struct mmc_host *host)
 {
-        mmc_detect_change(host);
+        mmc_detect_change(host, 0);
 
         return 0;
 }