linux-kernel - [PATCH 10/7] mmc_spi: fix bug introduced in patch 3/7

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Message-Id: <200903121549.37620.wolfgang.mues@auerswald.de>
Date:	Thu, 12 Mar 2009 15:49:37 +0100
From:	Wolfgang Mües <wolfgang.mues@...rswald.de>
To:	Pierre Ossman <drzeus@...eus.cx>
Cc:	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Matt Fleming" <matt@...sole-pimps.org>,
	"David Brownell" <dbrownell@...rs.sourceforge.net>,
	"Mike Frysinger" <vapier.adi@...il.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 10/7] mmc_spi: fix bug introduced in patch 3/7

From: Wolfgang Muees <wolfgang.mues@...rswald.de>

o Fix bug introduced in patch 3/7.
  The first 3 bits of the data response may be undefined;
  assuming that these bits are always 1 lead to unreliable
  transmission.

Signed-off-by: Wolfgang Muees <wolfgang.mues@...rswald.de>

---

diff -uprN 2_6_29_rc7_patch9_speedup/drivers/mmc/host/mmc_spi.c 2_6_29_rc7_patch10_bugfix_of_patch3/drivers/mmc/host/mmc_spi.c
--- 2_6_29_rc7_patch9_speedup/drivers/mmc/host/mmc_spi.c	2009-03-12 14:35:27.000000000 +0100
+++ 2_6_29_rc7_patch10_bugfix_of_patch3/drivers/mmc/host/mmc_spi.c	2009-03-12 14:40:03.000000000 +0100
@@ -725,6 +725,9 @@ mmc_spi_writeblock(struct mmc_spi_host *
 	pattern |= scratch->status[2] << 8;
 	pattern |= scratch->status[3];
 
+	/* First 3 bit of pattern are undefined */
+	pattern |= 0xE0000000;
+
 	/* left-adjust to leading 0 bit */
 	while (pattern & 0x80000000)
 		pattern <<= 1;

---
regards

i. A. Wolfgang Mües
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