give Sandisk/Kingston SDHC cards some slack before the SWITCH

command.

svn path=/dists/sid/linux-2.6/; revision=13525

debian/changelog

@@ -11,6 +11,8 @@ linux-2.6 (2.6.29-4) UNRELEASED; urgency=low
     - allow for alternative __copy_to_user/__clear_user implementations
     - alternative copy_to_user/clear_user implementation copy_user
   * [arm/orion5x, armel/kirkwood] Enable UACCESS_WITH_MEMCPY.
+  * [MMC] give Sandisk/Kingston SDHC cards some slack before the SWITCH
+    command.
 
   [ dann frazier ]
   * [parisc] Fix macro expansion in atomic.h fixing PHONET compilation issue

debian/patches/bugfix/all/mmc-sd-udelay-switch.patch

@@ -0,0 +1,34 @@
+From: Nicolas Pitre <nico@cam.org>
+Date: Tue, 28 Apr 2009 02:38:12 +0000 (-0400)
+Subject: [MMC] give Sandisk/Kingston SDHC cards some slack before the SWITCH command
+X-Git-Url: http://git.marvell.com/?p=orion.git;a=commitdiff_plain;h=3ea638523747f6d312f11f643a3175c1a4661eec
+
+[MMC] give Sandisk/Kingston SDHC cards some slack before the SWITCH command
+
+Without this delay, those cards simply won't work in high speed mode
+as the SWITCH command does not succeeds.
+
+Signed-off-by: Nicolas Pitre <nico@marvell.com>
+Tested-by: Martin Michlmayr <tbm@cyrius.com>
+---
+
+diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
+index cd81c39..ba4c7ab 100644
+--- a/drivers/mmc/core/sd.c
++++ b/drivers/mmc/core/sd.c
+@@ -263,6 +263,15 @@ static int mmc_switch_hs(struct mmc_card *card)
+ 		return -ENOMEM;
+ 	}
+ 
++	/*
++	 * Some SDHC cards, notably those with a Sandisk SD controller
++	 * (also found in Kingston products) need a bit of slack
++	 * before successfully handling the SWITCH command.  So far,
++	 * cards identifying themselves as "SD04G" and "SD08G" are
++	 * affected
++	 */
++	udelay(100);
++
+ 	err = mmc_sd_switch(card, 1, 0, 1, status);
+ 	if (err)
+ 		goto out;

debian/patches/series/4

@@ -7,3 +7,4 @@
 + features/arm/alternative-copy-user.patch
 - bugfix/mips/compat-zero-upper-32bits-of-offset_high-and-offset_low.patch
 + bugfix/all/stable/2.6.29.2.patch
++ bugfix/all/mmc-sd-udelay-switch.patch