Deepak Nibade 7505a75954 gpu: nvgpu: take power refcount in gk20a_cde_convert() ...

We have a gk20a_busy() call in gk20a_buffer_convert_gpu_to_cde()
and we again call gk20a_busy() in gk20a_submit_channel_gpfifo()

If gk20a_do_idle() is triggered in between these two calls,
then this leads to a deadlock and results in idle failure

Hence to avoid this take power refcount in a more fine-grained
way i.e. in gk20a_cde_convert() instead of taking in
gk20a_buffer_convert_gpu_to_cde()

Keep gk20a_cde_execute_buffer() out of the gk20a_busy()/
gk20a_idle() pair since we take power refcount in submit path
anyways

Add correct error handling path in gk20a_cde_convert()

Bug 200287073

Change-Id: Iffea2d4c03f42b47dbf05e7fe8fe2994f9c6b37c
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/1324329
(cherry picked from commit ce057d784d)
Reviewed-on: http://git-master/r/1320408
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

2017-03-23 07:13:55 -07:00

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