[ Upstream commit dd08a8d9a66de4b54575c294a92630299f7e0fe7 ]

When CONFIG_VMAP_STACK=y, __pa() returns incorrect physical address for
a stack virtual address. Stack DMA buffers must be avoided.
Signed-off-by: Nraymond pang <raymondpangxd@gmail.com>
Signed-off-by: NJens Axboe <axboe@kernel.dk>
Signed-off-by: NSasha Levin (Microsoft) <sashal@kernel.org>