MMC: S3C24XX: Ensure host->mrq->data is valid

Fix a crash if host->mrq->data is NULL on ending a transfer.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/mmc/host/s3cmci.c b/drivers/mmc/host/s3cmci.c
index 4fd11d8864eb..ffd9269a1874 100644
--- a/drivers/mmc/host/s3cmci.c
+++ b/drivers/mmc/host/s3cmci.c
@@ -353,7 +353,8 @@ static void pio_tasklet(unsigned long data)
                             (host->pio_active == XFER_READ) ? "read" : "write",
                             host->pio_count, host->pio_words);
 
-                        host->mrq->data->error = -EINVAL;
+                        if (host->mrq->data)
+                                host->mrq->data->error = -EINVAL;
                 }
 
                 finalize_request(host);