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Memory is being requested to the kernel but there is
a missing check for NULL. Hence, add it.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20201213161721.6514-5-sergio.paracuellos@gmail.com

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>