diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index fe8041e619eabec7029a12c8f7c0983e2a56346c..b25e9b6516ae6942d6e9a0c34fc3f0dba0f9556a 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -253,6 +253,14 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
 		brq.stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
 		brq.data.blocks = req->nr_sectors;
 
+		/*
+		 * The block layer doesn't support all sector count
+		 * restrictions, so we need to be prepared for too big
+		 * requests.
+		 */
+		if (brq.data.blocks > card->host->max_blk_count)
+			brq.data.blocks = card->host->max_blk_count;
+
 		/*
 		 * After a read error, we redo the request one sector at a time
 		 * in order to accurately determine which sectors can be read