Commit 4d315357 authored by 蒋家盛's avatar 蒋家盛 Committed by Ulf Hansson
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mmc: sh_mmcif: Check for null res pointer 



If there is no suitable resource, platform_get_resource() will return
NULL.
Therefore in order to avoid the dereference of the NULL pointer, it
should be better to check the 'res'.

Signed-off-by: default avatarJiasheng Jiang <jiasheng@iscas.ac.cn>
Cc: stable@vger.kernel.org # v5.16+
Link: https://lore.kernel.org/r/20220119120006.1426964-1-jiasheng@iscas.ac.cn


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 40c67c29

drivers/mmc/host/sh_mmcif.c

+3 −0
Original line number Diff line number Diff line
@@ -405,6 +405,9 @@ static int sh_mmcif_dma_slave_config(struct sh_mmcif_host *host, 
	struct dma_slave_config cfg = { 0, };



	res = platform_get_resource(host->pd, IORESOURCE_MEM, 0);

	if (!res)

		return -EINVAL;



	cfg.direction = direction;



	if (direction == DMA_DEV_TO_MEM) {