linux-kernel - [40/90] mmc: sd: Fix SDR12 timing regression

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Message-Id: <20120123234026.323566293@clark.kroah.org>
Date:	Mon, 23 Jan 2012 15:39:26 -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, Alexander Elbs <alex@...v.de>,
	Philip Rakity <prakity@...vell.com>,
	Arindam Nath <arindam.nath@....com>,
	Chris Ball <cjb@...top.org>
Subject: [40/90] mmc: sd: Fix SDR12 timing regression

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

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

From: Alexander Elbs <alex@...v.de>

commit dd8df17fe83483d7ea06ff229895e35a42071599 upstream.

This patch fixes a failure to recognize SD cards reported on a Dell
Vostro with O2 Micro SD card reader.  Patch 49c468f ("mmc: sd: add
support for uhs bus speed mode selection") caused the problem, by
setting the SDHCI_CTRL_HISPD flag even for legacy timings.

Signed-off-by: Alexander Elbs <alex@...v.de>
Acked-by: Philip Rakity <prakity@...vell.com>
Acked-by: Arindam Nath <arindam.nath@....com>
Signed-off-by: Chris Ball <cjb@...top.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/mmc/host/sdhci.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1340,8 +1340,7 @@ static void sdhci_set_ios(struct mmc_hos
 		if ((ios->timing == MMC_TIMING_UHS_SDR50) ||
 		    (ios->timing == MMC_TIMING_UHS_SDR104) ||
 		    (ios->timing == MMC_TIMING_UHS_DDR50) ||
-		    (ios->timing == MMC_TIMING_UHS_SDR25) ||
-		    (ios->timing == MMC_TIMING_UHS_SDR12))
+		    (ios->timing == MMC_TIMING_UHS_SDR25))
 			ctrl |= SDHCI_CTRL_HISPD;
 
 		ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);


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