From 912490db699d83cb3d03570b63df7448677a3f56 Mon Sep 17 00:00:00 2001
From: Pierre Ossman <drzeus-list@cx.rmk.(none)>
Date: Sat, 21 May 2005 10:27:02 +0100
Subject: [PATCH] MMC: Proper MMC command classes support
Defines for the different command classes as defined in the MMC and SD
specifications.
Removes the check for high command classes and instead checks that the
command classes needed are present.
Previous solution killed forward compatibility at no apparent gain.
Signed-of-by: Pierre Ossman
---
drivers/mmc/mmc_block.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
(limited to 'drivers')
diff --git a/drivers/mmc/mmc_block.c b/drivers/mmc/mmc_block.c
index b5b4a7b119..d4eee99c2b 100644
--- a/drivers/mmc/mmc_block.c
+++ b/drivers/mmc/mmc_block.c
@@ -383,7 +383,10 @@ static int mmc_blk_probe(struct mmc_card *card)
struct mmc_blk_data *md;
int err;
- if (card->csd.cmdclass & ~0x1ff)
+ /*
+ * Check that the card supports the command class(es) we need.
+ */
+ if (!(card->csd.cmdclass & CCC_BLOCK_READ))
return -ENODEV;
if (card->csd.read_blkbits < 9) {
--
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