From: Yang Yingliang <yangyingliang@xxxxxxxxxx>
[ Upstream commit 0c87db77423a282b3b38b8a6daf057b822680516 ]
mmc_add_host() may return error, if we ignore its return value, the memory
that allocated in mmc_alloc_host() will be leaked and it will lead a kernel
crash because of deleting not added device in the remove path.
So fix this by checking the return value and calling mmc_free_host() in the
error path, beside, runtime PM also needs be disabled.
Fixes: ff984e57d36e ("mmc: Add realtek pcie sdmmc host driver")
Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20221101063023.1664968-6-yangyingliang@xxxxxxxxxx
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/mmc/host/rtsx_pci_sdmmc.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/rtsx_pci_sdmmc.c b/drivers/mmc/host/rtsx_pci_sdmmc.c
index e1580f78c6b2..8098726dcc0b 100644
--- a/drivers/mmc/host/rtsx_pci_sdmmc.c
+++ b/drivers/mmc/host/rtsx_pci_sdmmc.c
@@ -1474,6 +1474,7 @@ static int rtsx_pci_sdmmc_drv_probe(struct platform_device *pdev)
struct realtek_pci_sdmmc *host;
struct rtsx_pcr *pcr;
struct pcr_handle *handle = pdev->dev.platform_data;
+ int ret;
if (!handle)
return -ENXIO;
@@ -1511,7 +1512,13 @@ static int rtsx_pci_sdmmc_drv_probe(struct platform_device *pdev)
pm_runtime_mark_last_busy(&pdev->dev);
pm_runtime_use_autosuspend(&pdev->dev);
- mmc_add_host(mmc);
+ ret = mmc_add_host(mmc);
+ if (ret) {
+ pm_runtime_dont_use_autosuspend(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+ mmc_free_host(mmc);
+ return ret;
+ }
return 0;
}
--
2.35.1
