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Subject[PATCH] mmc: dw_mmc: Fix potential null pointer risk
Date
we previously assumed 'host->slot' could be null,
null pointer judgment should be added

Signed-off-by: Wen Zhiwei <wenzhiwei@kylinos.cn>
---
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 d977f34f6b55..c9dc8c168efb 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -3518,7 +3518,7 @@ 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 */
--
2.30.0
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