[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
diff --git a/drivers/mmc/mmc_block.c b/drivers/mmc/mmc_block.c
index b5b4a7b..d4eee99 100644
--- a/drivers/mmc/mmc_block.c
+++ b/drivers/mmc/mmc_block.c
@@ -383,7 +383,10 @@
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) {