diff options
| -rw-r--r-- | drivers/dfu/dfu_mmc.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/dfu/dfu_mmc.c b/drivers/dfu/dfu_mmc.c index 72fa03e..62d72fe 100644 --- a/drivers/dfu/dfu_mmc.c +++ b/drivers/dfu/dfu_mmc.c @@ -40,10 +40,16 @@ static int mmc_access_part(struct dfu_entity *dfu, struct mmc *mmc, int part) static int mmc_block_op(enum dfu_op op, struct dfu_entity *dfu, u64 offset, void *buf, long *len) { - struct mmc *mmc = find_mmc_device(dfu->data.mmc.dev_num); + struct mmc *mmc; u32 blk_start, blk_count, n = 0; int ret, part_num_bkp = 0; + mmc = find_mmc_device(dfu->data.mmc.dev_num); + if (!mmc) { + error("Device MMC %d - not found!", dfu->data.mmc.dev_num); + return -ENODEV; + } + /* * We must ensure that we work in lba_blk_size chunks, so ALIGN * this value. |