[ARM] 5322/1: Fix fastpath issue in mmci.c

Fix fastpath issues

Since mmci_request() can be called from a non-interrupt
context, and does, during kernel init, causing a host
of debug messages during boot if you enable spinlock debugging,
we need to use the spinlock calls that save IRQ flags and
restore them.

Signed-off-by: Linus Walleij <triad@df.lth.se>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 696cf3647ceb..2fadf323c696 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -391,6 +391,7 @@ static irqreturn_t mmci_irq(int irq, void *dev_id)
 static void mmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
 {
         struct mmci_host *host = mmc_priv(mmc);
+        unsigned long flags;
 
         WARN_ON(host->mrq != NULL);
 
@@ -402,7 +403,7 @@ static void mmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
                 return;
         }
 
-        spin_lock_irq(&host->lock);
+        spin_lock_irqsave(&host->lock, flags);
 
         host->mrq = mrq;
 
@@ -411,7 +412,7 @@ static void mmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
 
         mmci_start_command(host, mrq->cmd, 0);
 
-        spin_unlock_irq(&host->lock);
+        spin_unlock_irqrestore(&host->lock, flags);
 }
 
 static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)