mmc: only set blockaddressed for > 2GiB cards

PATCH In review [email protected] 1 participant 1 message Aug 11, 2010 MMC, SD and SDIO

lore

Share & tools

lore

[email protected]

author

2010-08-11 01:02 UTC #0 lore raw

PATCH 39/177 mmc: only set blockaddressed for > 2GiB cards

From: Hanumath Prasad <[email protected]>

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 <[email protected]>

Signed-off-by Hanumath Prasad <[email protected]>

Signed-off-by Rabin Vincent <[email protected]>

Cc <[email protected]>

Signed-off-by Andrew Morton <[email protected]>

---

 drivers/mmc/core/mmc.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

drivers/mmc/core/mmc.c renamed from drivers/mmc/core/mmc.c~mmc-only-set-blockaddressed-for-2gib-cards +3 -1

diff -puN drivers/mmc/core/mmc.c~mmc-only-set-blockaddressed-for-2gib-cards drivers/mmc/core/mmc.c
@@ -234,7 +234,9 @@ static int mmc_read_ext_csd(struct mmc_c
 			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);
 	}