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arm: stm32mp: stm32prog: check result of find_mmc_device

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Check result of find_mmc_device() before calling mmc_init().

This patch avoid a data abort when the command try to acces
to sd/mmc device deactivated in device tree.

Fixes: aff4c5dd8265 ("stm32mp: stm32prog: add MMC device")
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
This commit is contained in:
Patrick Delaunay 2020-07-06 13:20:58 +02:00 committed by Patrice Chotard
parent 4b64265bb4
commit ded48bec05
1 changed files with 1 additions and 1 deletions
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2
arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.c
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@ -560,7 +560,7 @@ static int init_device(struct stm32prog_data *data,
#ifdef CONFIG_MMC #ifdef CONFIG_MMC
case STM32PROG_MMC: case STM32PROG_MMC:
mmc = find_mmc_device(dev->dev_id); mmc = find_mmc_device(dev->dev_id);
if (mmc_init(mmc)) { if (!mmc || mmc_init(mmc)) {
stm32prog_err("mmc device %d not found", dev->dev_id); stm32prog_err("mmc device %d not found", dev->dev_id);
return -ENODEV; return -ENODEV;
} }