MIPS: lantiq: check the return value of kzalloc()
[ Upstream commit 34123208 ] kzalloc() is a memory allocation function which can return NULL when some internal memory errors happen. So it is better to check the return value of it to prevent potential wrong memory access or memory leak. Signed-off-by: Xiaoke Wang <xkernel.wang@foxmail.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Sasha Levin <sashal@kernel.org>
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