linux-kernel - [38/90] mmc: core: Fix voltage select in DDR mode

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Date:	Mon, 23 Jan 2012 15:39:24 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk,
	Girish K S <girish.shivananjappa@...aro.org>,
	Subhash Jadavani <subhashj@...eaurora.org>,
	Philip Rakity <prakity@...vell.com>,
	Chris Ball <cjb@...top.org>
Subject: [38/90] mmc: core: Fix voltage select in DDR mode

3.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Girish K S <girish.shivananjappa@...aro.org>

commit 913047e9e5787a90696533a9f109552b7694ecc9 upstream.

This patch fixes the wrong comparison before setting the interface
voltage in DDR mode.

The assignment to the variable ddr before comaprison is either
ddr = MMC_1_2V_DDR_MODE; or ddr == MMC_1_8V_DDR_MODE. But the comparison
is done with the extended csd value if ddr == EXT_CSD_CARD_TYPE_DDR_1_2V.

Signed-off-by: Girish K S <girish.shivananjappa@...aro.org>
Acked-by: Subhash Jadavani <subhashj@...eaurora.org>
Acked-by: Philip Rakity <prakity@...vell.com>
Signed-off-by: Chris Ball <cjb@...top.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/mmc/core/mmc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -830,7 +830,7 @@ static int mmc_init_card(struct mmc_host
 			 *
 			 * WARNING: eMMC rules are NOT the same as SD DDR
 			 */
-			if (ddr == EXT_CSD_CARD_TYPE_DDR_1_2V) {
+			if (ddr == MMC_1_2V_DDR_MODE) {
 				err = mmc_set_signal_voltage(host,
 					MMC_SIGNAL_VOLTAGE_120, 0);
 				if (err)


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