From cde600af7b413c9fe03e85c58c4279df90e91d13 Mon Sep 17 00:00:00 2001
From: Yang Yingliang <yangyingliang@huawei.com>
Date: Tue, 1 Nov 2022 14:30:17 +0800
Subject: [PATCH] mmc: mxcmmc: fix return value check of mmc_add_host()
Git-commit: cde600af7b413c9fe03e85c58c4279df90e91d13
Patch-mainline: v6.2-rc1
References: git-fixes
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().
Fixes: d96be879ff46 ("mmc: Add a MX2/MX3 specific SDHC driver")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20221101063023.1664968-4-yangyingliang@huawei.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/mmc/host/mxcmmc.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/mxcmmc.c b/drivers/mmc/host/mxcmmc.c
index 2cf0413407ea..668f865f3efb 100644
--- a/drivers/mmc/host/mxcmmc.c
+++ b/drivers/mmc/host/mxcmmc.c
@@ -1143,7 +1143,9 @@ static int mxcmci_probe(struct platform_device *pdev)
timer_setup(&host->watchdog, mxcmci_watchdog, 0);
- mmc_add_host(mmc);
+ ret = mmc_add_host(mmc);
+ if (ret)
+ goto out_free_dma;
return 0;
--
2.35.3