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>
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 0ebcc45..2a58031 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -1657,6 +1657,9 @@
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;