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mmc: pxamci: fix return value check of mmc_add_host()

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[ 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: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20221101063023.1664968-5-yangyingliang@huawei.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yang Yingliang 2022-11-01 14:30:18 +08:00 committed by Greg Kroah-Hartman
parent 32eb502c97
commit 0b7b634225
1 changed files with 6 additions and 1 deletions
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7
drivers/mmc/host/pxamci.c
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@ -761,7 +761,12 @@ 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;