[PATCH] arm: stm32mp: stm32prog: check result of find_mmc_device

[Patrick Delaunay]

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 at st.com>
---

 arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.c b/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.c
index c5b8841b23..e4199dbaa5 100644
--- a/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.c
+++ b/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.c
@@ -560,7 +560,7 @@ static int init_device(struct stm32prog_data *data,
 #ifdef CONFIG_MMC
 	case STM32PROG_MMC:
 		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);
 			return -ENODEV;
 		}
-- 
2.17.1