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[ Upstream commit3c347cdafa] If dmam_alloc_attrs() fails, it returns NULL pointer and never return ERR_PTR(), so repleace IS_ERR() with IS_ERR_OR_NULL() and if it's NULL, returns -ENOMEM. Fixes:9ba26f5cec("ARM: sa1100/assabet: move dmabounce hack to ohci driver") Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Link: https://lore.kernel.org/r/20221125064120.2842452-1-yangyingliang@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>