diff --git a/[refs] b/[refs]
index 42371128cc35..14d467f10386 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 53f3a9e26ed5a94bd3caf732e7635692cd3c4402
+refs/heads/master: 12578f66b9058e63f193fbfe1552e1d1bfa361bb
diff --git a/trunk/drivers/mmc/card/block.c b/trunk/drivers/mmc/card/block.c
index 00073b7c0368..759a105cb216 100644
--- a/trunk/drivers/mmc/card/block.c
+++ b/trunk/drivers/mmc/card/block.c
@@ -620,7 +620,8 @@ static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
 	 * messages to tell when the card is present.
 	 */
 
-	sprintf(md->disk->disk_name, "mmcblk%d", devidx);
+	snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
+		"mmcblk%d", devidx);
 
 	blk_queue_logical_block_size(md->queue.queue, 512);