tee: amdtee: fix an IS_ERR() vs NULL bug
stable inclusion from stable-v5.10.88 commit 640e28d618e82be78fb43b4bf5113bc90d6aa442 bugzilla: 186058 https://gitee.com/openeuler/kernel/issues/I4QW6A Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=640e28d618e82be78fb43b4bf5113bc90d6aa442 -------------------------------- [ Upstream commit 9d748277 ] The __get_free_pages() function does not return error pointers it returns NULL so fix this condition to avoid a NULL dereference. Fixes: 757cc3e9 ("tee: add AMD-TEE driver") Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com> Acked-by: NRijo Thomas <Rijo-john.Thomas@amd.com> Signed-off-by: NJens Wiklander <jens.wiklander@linaro.org> Signed-off-by: NSasha Levin <sashal@kernel.org> Signed-off-by: NChen Jun <chenjun102@huawei.com> Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
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