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| author | Debarshi Dutta <ddutta@nvidia.com> | 2019-10-31 06:33:33 -0400 |
|---|---|---|
| committer | mobile promotions <svcmobile_promotions@nvidia.com> | 2020-01-24 06:41:52 -0500 |
| commit | f0fca24ffb03c14647e03d611b901bf02426c37a (patch) | |
| tree | 8882758b169918d444fe30747233d9da8863f76b /drivers/gpu/nvgpu/gp10b/gp10b.c | |
| parent | 9e9046f03cf3125067666dc652499a4b7f39d9c0 (diff) | |
gpu: nvgpu: avoid double mapping of usermode mmap region
gk20a_pm_runtime_suspend can fail and invoke gk20a_pm_finalize_poweron
that can cause double mapping of the usermode mmap region via
io_remap_pfn_range(). Avoid this by using a boolean variable to track
whether the region is already mapped.
Bug 2707416
Bug 200582208
Change-Id: I4d8cbe427400a5b986348a19af145367cc08ffc6
Signed-off-by: Debarshi Dutta <ddutta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2229312
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2283801
Reviewed-by: Kajetan Dutka <kdutka@nvidia.com>
Reviewed-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-by: Amulya Yarlagadda <ayarlagadda@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: Kajetan Dutka <kdutka@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Diffstat (limited to 'drivers/gpu/nvgpu/gp10b/gp10b.c')
0 files changed, 0 insertions, 0 deletions