From: Yang Yingliang <yangyingliang@xxxxxxxxxx>
[ Upstream commit 80e1ef3afb8bfbe768380b70ffe1b6cab87d1a3b ]
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 goto error path which will call
mmc_free_host(), besides, ->exit() need be called to uninit the pdata.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20221101063023.1664968-5-yangyingliang@xxxxxxxxxx
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/mmc/host/pxamci.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/pxamci.c b/drivers/mmc/host/pxamci.c
index 55868b6b8658..e25e9bb34eb3 100644
--- a/drivers/mmc/host/pxamci.c
+++ b/drivers/mmc/host/pxamci.c
@@ -763,7 +763,12 @@ static int pxamci_probe(struct platform_device *pdev)
dev_warn(dev, "gpio_ro and get_ro() both defined\n");
}
- mmc_add_host(mmc);
+ ret = mmc_add_host(mmc);
+ if (ret) {
+ if (host->pdata && host->pdata->exit)
+ host->pdata->exit(dev, mmc);
+ goto out;
+ }
return 0;
--
2.35.1
