diff options
| author | Jean-Jacques Hiblot | 2017-11-30 17:43:58 +0100 |
|---|---|---|
| committer | Jaehoon Chung | 2018-01-12 18:11:04 +0900 |
| commit | 1de06b9fa5871b75012307ea736c8a43edf5a888 (patch) | |
| tree | b469ffe717befa61963e7c952566184eb9f98c89 | |
| parent | 1da8eb598fb7fd631483a7db0a42d5de286f98a5 (diff) | |
mmc: fix for old MMCs (below version 4)
The ext_csd is allocated only for MMC above version 4. The compare will
crash or fail for older MMCs.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
| -rw-r--r-- | drivers/mmc/mmc.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 0ebcc455166..2a58031c198 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -1657,6 +1657,9 @@ static int mmc_read_and_compare_ext_csd(struct mmc *mmc) const u8 *ext_csd = mmc->ext_csd; ALLOC_CACHE_ALIGN_BUFFER(u8, test_csd, MMC_MAX_BLOCK_LEN); + if (mmc->version < MMC_VERSION_4) + return 0; + err = mmc_send_ext_csd(mmc, test_csd); if (err) return err; |