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| author | Jason Gunthorpe <jgg@mellanox.com> | 2019-11-12 16:22:27 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-04 19:18:22 +0100 |
| commit | 7da0d7a575434fb82472a894960152c8c6b30347 (patch) | |
| tree | 9309bcbbef6dfc5db6a70b7639b24acf8c60cc3e /tools | |
| parent | 4f13232aa6370e09616563514ed7ef9d81c69f0e (diff) | |
| download | linux-stable-7da0d7a575434fb82472a894960152c8c6b30347.tar.gz linux-stable-7da0d7a575434fb82472a894960152c8c6b30347.tar.bz2 linux-stable-7da0d7a575434fb82472a894960152c8c6b30347.zip | |
drm/amdgpu: Call find_vma under mmap_sem
[ Upstream commit a9ae8731e6e52829a935d81a65d7f925cb95dbac ]
find_vma() must be called under the mmap_sem, reorganize this code to
do the vma check after entering the lock.
Further, fix the unlocked use of struct task_struct's mm, instead use
the mm from hmm_mirror which has an active mm_grab. Also the mm_grab
must be converted to a mm_get before acquiring mmap_sem or calling
find_vma().
Fixes: 66c45500bfdc ("drm/amdgpu: use new HMM APIs and helpers")
Fixes: 0919195f2b0d ("drm/amdgpu: Enable amdgpu_ttm_tt_get_user_pages in worker threads")
Link: https://lore.kernel.org/r/20191112202231.3856-11-jgg@ziepe.ca
Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Philip Yang <Philip.Yang@amd.com>
Tested-by: Philip Yang <Philip.Yang@amd.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'tools')
0 files changed, 0 insertions, 0 deletions