mmc: wmt-sdmmc: fix return value check of mmc_add_host()

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[ Upstream commit 29276d56f6 ]

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, clk_disable_unprepare() also needs be called.

Fixes: 3a96dff0f8 ("mmc: SD/MMC Host Controller for Wondermedia WM8505/WM8650")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20221101063023.1664968-10-yangyingliang@huawei.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Yang Yingliang 2022-11-01 14:30:23 +08:00 • committed by Greg Kroah-Hartman

parent 2044b2ea77

commit eb7a2d516d

1 changed files with 5 additions and 1 deletions

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drivers/mmc/host/wmt-sdmmc.c

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