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/openbmc/linux/drivers/mmc/host/ |
H A D | atmel-mci.c | 9e6e8c43 Tue Nov 08 06:28:19 CST 2022 Yang Yingliang <yangyingliang@huawei.com> mmc: atmel-mci: fix return value check of mmc_add_host()
mmc_add_host() may return error, if we ignore its return value, it will lead two issues: 1. The memory that allocated in mmc_alloc_host() is leaked. 2. In the remove() path, mmc_remove_host() will be called to delete device, but it's not added yet, it will lead a kernel crash because of null-ptr-deref in device_del().
So fix this by checking the return value and calling mmc_free_host() in the error path.
Fixes: 7d2be0749a59 ("atmel-mci: Driver for Atmel on-chip MMC controllers") Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Link: https://lore.kernel.org/r/20221108122819.429975-1-yangyingliang@huawei.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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