When requesting a trim for several bytes, everything up to the next erase-group is erased. This causes data corruption.
Signed-off-by: Robin van der Gracht <[email protected]> --- drivers/mmc/core/core.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 083cade..57edb2a 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -2227,9 +2227,8 @@ int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr, * and call mmc_do_erase() twice if necessary. This special case is * identified by the card->eg_boundary flag. */ - if ((arg & MMC_TRIM_ARGS) && (card->eg_boundary) && - (from % card->erase_size)) { - rem = card->erase_size - (from % card->erase_size); + rem = card->erase_size - (from % card->erase_size); + if ((arg & MMC_TRIM_ARGS) && (card->eg_boundary) && (nr > rem)) { err = mmc_do_erase(card, from, from + rem - 1, arg); from += rem; if ((err) || (to <= from)) -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
