From ad6f57205c739055fbab62ef127a37eda76a044a Mon Sep 17 00:00:00 2001 From: Przemyslaw Marczak Date: Fri, 28 Nov 2014 14:09:00 +0100 Subject: [PATCH] dfu: mmc: check if mmc dev exists in mmc_block_op Change-Id: I8d74d948c735c42b0f1e75831abf0ca89bf3e883 Signed-off-by: Przemyslaw Marczak --- drivers/dfu/dfu_mmc.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/dfu/dfu_mmc.c b/drivers/dfu/dfu_mmc.c index 2689dd466d..bf073e7f4c 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) { + printf("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. -- 2.34.1