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 <robin@xxxxxxxxxxx>
---
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
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