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| author | Deepak Nibade <dnibade@nvidia.com> | 2015-04-23 07:40:42 -0400 |
|---|---|---|
| committer | Ishan Mittal <imittal@nvidia.com> | 2015-05-18 02:03:48 -0400 |
| commit | 7ddd6e261ed620dbb388202be89ca4e6843e3947 (patch) | |
| tree | fd8483ccec9dc619fb651f60aa40f725e87c8527 /drivers/gpu/nvgpu/gm20b/ltc_gm20b.c | |
| parent | d65a93b80c60bb677fbc13b7180e0f31b7f97f84 (diff) | |
gpu: nvgpu: wait for running jobs to finish before shutdown
In gk20a_pm_shutdown(), we currently call __pm_runtime_disable()
which prevents h/w access to new requests made after shutdown() call
Also, once gk20a_pm_shutdown() completes, platform code will
just rail gate the GPU
But it is possible that some other thread is already accessing
h/w while shutdown() was triggered and this can result in hang
Hence, wait until all currently executing jobs are finished
before returning from gk20a_pm_shutdown()
Also, we need to wait for GPU's usage count to become 1 since
platform code will increase the usage count and then call
shutdown(). Hence usage count of 1 indicates that GPU is idle
Bug 200099940
Change-Id: I1f2457829e2737c07302d13f355353a30c3b4e67
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/734920
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Tested-by: Bharat Nihalani <bnihalani@nvidia.com>
Diffstat (limited to 'drivers/gpu/nvgpu/gm20b/ltc_gm20b.c')
0 files changed, 0 insertions, 0 deletions