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[ Upstream commit7f360bec37] First, when memory allocation for sg_list_unaligned failed, there is a bug of calling put_pages() as we haven't pinned any pages. Second, if get_user_pages_fast() failed we should unpin num_pinned pages. This will address both. As part of these changes, minor update in documentation. Fixes:6db7199407("drivers/virt: introduce Freescale hypervisor management driver") Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com> Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: John Hubbard <jhubbard@nvidia.com> Link: https://lore.kernel.org/r/1598995271-6755-1-git-send-email-jrdr.linux@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>