1 files changed, 6 insertions, 3 deletions

diff --git a/drivers/mmc/core/sdio_ops.c b/drivers/mmc/core/sdio_ops.c
index f087d876c573..b0517cc06200 100644
--- a/drivers/mmc/core/sdio_ops.c
+++ b/drivers/mmc/core/sdio_ops.c
@@ -121,7 +121,7 @@ int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn,
 int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn,
         unsigned addr, int incr_addr, u8 *buf, unsigned blocks, unsigned blksz)
 {
-        struct mmc_request mrq = {0};
+        struct mmc_request mrq = {NULL};
         struct mmc_command cmd = {0};
         struct mmc_data data = {0};
         struct scatterlist sg;
@@ -144,8 +144,11 @@ int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn,
         cmd.arg |= fn << 28;
         cmd.arg |= incr_addr ? 0x04000000 : 0x00000000;
         cmd.arg |= addr << 9;
-        if (blocks == 1 && blksz <= 512)
-                cmd.arg |= (blksz == 512) ? 0 : blksz;  /* byte mode */
+        if (blocks == 1 && blksz < 512)
+                cmd.arg |= blksz;                       /* byte mode */
+        else if (blocks == 1 && blksz == 512 &&
+                 !(mmc_card_broken_byte_mode_512(card)))
+                cmd.arg |= 0;                           /* byte mode, 0==512 */
         else
                 cmd.arg |= 0x08000000 | blocks;         /* block mode */
         cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC;