From 4a835afd808a3dbbac44bb399a902b822dc7445c Mon Sep 17 00:00:00 2001 From: Wen Zhiwei Date: Wed, 29 Dec 2021 10:38:14 +0800 Subject: [PATCH] mmc: dw_mmc: Fix potential null pointer risk we previously assumed 'host->slot' could be null, null pointer judgment should be added Signed-off-by: Wen Zhiwei Reviewed-by: Jaehoon Chung Link: https://lore.kernel.org/r/20211229023814.53372-1-wenzhiwei@kylinos.cn Signed-off-by: Ulf Hansson --- drivers/mmc/host/dw_mmc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index 42bf8a2287ba7..99b201921954b 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -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 */ -- 2.30.2