mmc: only set blockaddressed for > 2GiB cards

A non-zero value of SEC_COUNT does not indicate that the card is sector
addressed.  According to the MMC specification, cards with a density
greater than 2GiB are sector addressed.

Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Hanumath Prasad <hanumath.prasad@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index cd8d3d2ea901..ccba3869c029 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -234,7 +234,9 @@ static int mmc_read_ext_csd(struct mmc_card *card)
                         ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
                         ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
                         ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
-                if (card->ext_csd.sectors)
+
+                /* Cards with density > 2GiB are sector addressed */
+                if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
                         mmc_card_set_blockaddr(card);
         }