mmc: cavium: Fix a shift wrapping bug

"dat" is a u64 and "shift" starts as 54 so this is a shift wrapping bug.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/host/cavium.c b/drivers/mmc/host/cavium.c
index d89c2ebcad90d773d1c94c2f3cfe15e87ee8c63f..d89c011bbea8bf334329ffd836ba94722899f775 100644 (file)
--- a/drivers/mmc/host/cavium.c
+++ b/drivers/mmc/host/cavium.c
@@ -733,7 +733,7 @@ static void do_write_request(struct cvm_mmc_host *host, struct mmc_request *mrq)
                }
 
                while (smi->consumed < smi->length && shift >= 0) {
-                       dat |= ((u8 *)smi->addr)[smi->consumed] << shift;
+                       dat |= (u64)((u8 *)smi->addr)[smi->consumed] << shift;
                        bytes_xfered++;
                        smi->consumed++;
                        shift -= 8;