diff options
| author | Ralph Campbell <rcampbell@nvidia.com> | 2020-03-04 03:13:36 +0300 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2020-04-07 07:37:49 +0300 |
| commit | b92103b559c77abc5f8b7bec269230a219c880b7 (patch) | |
| tree | 935bccb7996c625caf18b8dc572d8f6be0b038b9 /drivers/gpu | |
| parent | e18c6e8b6f5b567c54cbdf422c89c877d49e9c4e (diff) | |
| download | linux-b92103b559c77abc5f8b7bec269230a219c880b7.tar.xz | |
drm/nouveau/svm: fix vma range check for migration
find_vma_intersection(mm, start, end) only guarantees that end is greater
than or equal to vma->vm_start but doesn't guarantee that start is
greater than or equal to vma->vm_start. The calculation for the
intersecting range in nouveau_svmm_bind() isn't accounting for this and
can call migrate_vma_setup() with a starting address less than
vma->vm_start. This results in migrate_vma_setup() returning -EINVAL for
the range instead of nouveau skipping that part of the range and migrating
the rest.
Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_svm.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_svm.c b/drivers/gpu/drm/nouveau/nouveau_svm.c index df9bf1fd1bc0..169320409286 100644 --- a/drivers/gpu/drm/nouveau/nouveau_svm.c +++ b/drivers/gpu/drm/nouveau/nouveau_svm.c @@ -179,6 +179,7 @@ nouveau_svmm_bind(struct drm_device *dev, void *data, if (!vma) break; + addr = max(addr, vma->vm_start); next = min(vma->vm_end, end); /* This is a best effort so we ignore errors */ nouveau_dmem_migrate_vma(cli->drm, vma, addr, next); |