From 0ca18d09c744fb030ae9bc5836c3e357e0237dea Mon Sep 17 00:00:00 2001
From: Yang Yingliang <yangyingliang@huawei.com>
Date: Tue, 1 Nov 2022 14:30:16 +0800
Subject: [PATCH] mmc: moxart: fix return value check of mmc_add_host()
Git-commit: 0ca18d09c744fb030ae9bc5836c3e357e0237dea
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: 1b66e94e6b99 ("mmc: moxart: Add MOXA ART SD/MMC driver")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20221101063023.1664968-3-yangyingliang@huawei.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/mmc/host/moxart-mmc.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/moxart-mmc.c b/drivers/mmc/host/moxart-mmc.c
index dfc3ffd5b1f8..52ed30f2d9f4 100644
--- a/drivers/mmc/host/moxart-mmc.c
+++ b/drivers/mmc/host/moxart-mmc.c
@@ -665,7 +665,9 @@ static int moxart_probe(struct platform_device *pdev)
goto out;
dev_set_drvdata(dev, mmc);
- mmc_add_host(mmc);
+ ret = mmc_add_host(mmc);
+ if (ret)
+ goto out;
dev_dbg(dev, "IRQ=%d, FIFO is %d bytes\n", irq, host->fifo_width);
--
2.35.3