From: Hanumath Prasad <hanumath.prasad@stericsson.com>
Date: Wed, 11 Aug 2010 01:01:45 +0000 (-0700)
Subject: mmc: only set blockaddressed for > 2GiB cards
X-Git-Tag: upstream/snapshot3+hdmi~13456
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=fc8a0985c2846292312556cba10b8a4182f55967;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

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>
---

diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index cd8d3d2..ccba386 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);
 	}