linux-kernel - [PATCH] mmc: only set blockaddressed for

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Date:	Tue, 22 Jun 2010 13:49:22 +0530
From:	Rabin Vincent <rabin.vincent@...ricsson.com>
To:	<linux-mmc@...r.kernel.org>
Cc:	<linux-kernel@...r.kernel.org>,
	<STEricsson_nomadik_linux@...t.st.com>,
	Hanumath Prasad <hanumath.prasad@...ricsson.com>,
	Rabin Vincent <rabin.vincent@...ricsson.com>,
	Linus Walleij <linus.walleij@...ricsson.com>
Subject: [PATCH] mmc: only set blockaddressed for > 2GiB cards

From: Hanumath Prasad <hanumath.prasad@...ricsson.com>

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@...ricsson.com>
Signed-off-by: Hanumath Prasad <hanumath.prasad@...ricsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@...ricsson.com>
---
 drivers/mmc/core/mmc.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 89f7a25..1dc784e 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -222,7 +222,9 @@ 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);
 	}
 
-- 
1.7.0

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