[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>
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 0a117c6..ceae379 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -1079,13 +1079,17 @@
/**
* 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 @@
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 @@
*/
int mmc_resume_host(struct mmc_host *host)
{
- mmc_detect_change(host);
+ mmc_detect_change(host, 0);
return 0;
}
diff --git a/drivers/mmc/mmci.c b/drivers/mmc/mmci.c
index 716c4ef..91c7484 100644
--- a/drivers/mmc/mmci.c
+++ b/drivers/mmc/mmci.c
@@ -442,7 +442,7 @@
status = host->plat->status(mmc_dev(host->mmc));
if (status ^ host->oldstat)
- mmc_detect_change(host->mmc);
+ mmc_detect_change(host->mmc, 0);
host->oldstat = status;
mod_timer(&host->timer, jiffies + HZ);
diff --git a/drivers/mmc/pxamci.c b/drivers/mmc/pxamci.c
index e99a53b..5223cd3 100644
--- a/drivers/mmc/pxamci.c
+++ b/drivers/mmc/pxamci.c
@@ -423,7 +423,7 @@
static irqreturn_t pxamci_detect_irq(int irq, void *devid, struct pt_regs *regs)
{
- mmc_detect_change(devid);
+ mmc_detect_change(devid, 0);
return IRQ_HANDLED;
}
diff --git a/drivers/mmc/wbsd.c b/drivers/mmc/wbsd.c
index dec01d3..a62c86f 100644
--- a/drivers/mmc/wbsd.c
+++ b/drivers/mmc/wbsd.c
@@ -1122,7 +1122,7 @@
DBG("Executing card detection\n");
- mmc_detect_change(host->mmc);
+ mmc_detect_change(host->mmc, 0);
}
/*
@@ -1198,7 +1198,7 @@
*/
spin_unlock(&host->lock);
- mmc_detect_change(host->mmc);
+ mmc_detect_change(host->mmc, 0);
}
else
spin_unlock(&host->lock);
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 6014160..c5d73c0 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -123,7 +123,7 @@
extern int mmc_suspend_host(struct mmc_host *, pm_message_t);
extern int mmc_resume_host(struct mmc_host *);
-extern void mmc_detect_change(struct mmc_host *);
+extern void mmc_detect_change(struct mmc_host *, unsigned long delay);
extern void mmc_request_done(struct mmc_host *, struct mmc_request *);
#endif