Before issuing mmc_erase() function, users always have checked if it can
erase with mmc_can_erase/trim/discard() function, thus remove the redundant
erase checking in mmc_erase() function.

Signed-off-by: Baolin Wang <[email protected]>
Tested-by: Shawn Lin <[email protected]>
---
Changes since v3:
 - Split into 3 separate patches.
 - Add test tag by Shawn.

Changes since v2:
 - Add nr checking and other optimization in mmc_erase() function.

Changes since v1:
 - Add the alignment if card->erase_size is not power of 2.
---
 drivers/mmc/core/core.c |    7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index e55cde6..7d7209d 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2217,13 +2217,6 @@ int mmc_erase(struct mmc_card *card, unsigned int from, 
unsigned int nr,
        unsigned int rem, to = from + nr;
        int err;
 
-       if (!(card->host->caps & MMC_CAP_ERASE) ||
-           !(card->csd.cmdclass & CCC_ERASE))
-               return -EOPNOTSUPP;
-
-       if (!card->erase_size)
-               return -EOPNOTSUPP;
-
        if (mmc_card_sd(card) && arg != MMC_ERASE_ARG)
                return -EOPNOTSUPP;
 
-- 
1.7.9.5

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