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mmc: dw_mmc: Fix potential null pointer risk

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we previously assumed 'host->slot' could be null,
null pointer judgment should be added

Signed-off-by: Wen Zhiwei <wenzhiwei@kylinos.cn>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Link: https://lore.kernel.org/r/20211229023814.53372-1-wenzhiwei@kylinos.cn
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Wen Zhiwei 2021-12-29 10:38:14 +08:00 committed by Ulf Hansson
parent 7e57714cd0
commit 4a835afd80
1 changed files with 1 additions and 1 deletions
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2
drivers/mmc/host/dw_mmc.c
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@ -3568,7 +3568,7 @@ int dw_mci_runtime_resume(struct device *dev)
mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE);
if (host->slot->mmc->pm_flags & MMC_PM_KEEP_POWER)
if (host->slot && host->slot->mmc->pm_flags & MMC_PM_KEEP_POWER)
dw_mci_set_ios(host->slot->mmc, &host->slot->mmc->ios);
/* Force setup bus to guarantee available clock output */