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[ Upstream commit8325a6c24a] As platform_driver_register() can return error numbers, it should be better to check platform_driver_register() and deal with the exception. Fixes:b6d6454fdb("[PATCH] mfd: SM501 core driver") Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn> Signed-off-by: Lee Jones <lee@kernel.org> Link: https://lore.kernel.org/r/20220913091112.1739138-1-jiasheng@iscas.ac.cn Signed-off-by: Sasha Levin <sashal@kernel.org>