mmc: fix off-by-one bug in mmc_startup_v4()

MMC card with EXT_CSD_REV value 9 will trigger off-by-one
bug while accessing mmc_versions array. The patch fix that.

Signed-off-by: Alexander Kochetkov <al.kochet@gmail.com>

diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 31f65f6e242f6eb57d2ffddbd3146e42e014d6e0..c93089330030f07a42bd38502c4a536ffec75447 100644 (file)
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -1969,7 +1969,7 @@ static int mmc_startup_v4(struct mmc *mmc)
                return -ENOMEM;
        memcpy(mmc->ext_csd, ext_csd, MMC_MAX_BLOCK_LEN);
 
-       if (ext_csd[EXT_CSD_REV] > ARRAY_SIZE(mmc_versions))
+       if (ext_csd[EXT_CSD_REV] >= ARRAY_SIZE(mmc_versions))
                return -EINVAL;
 
        mmc->version = mmc_versions[ext_csd[EXT_CSD_REV]];