Deepak Nibade 47cd4860f0 gpu: nvgpu: skip taking g->busy_lock in gk20a_idle ...

We use g->busy_lock in gk20a_do_idle() to prevent submitting
more jobs to h/w and to wait for currently running jobs to
finish

But requesting this lock in gk20a_idle() prevents decrementing
runtime counter and hence gk20a_do_idle() can timeout with
below prints
[  148.904739] gk20a 17000000.gp10b: Timeout detected @
gk20a_do_idle+0x30/0x38
[  148.912185] gk20a 17000000.gp10b: __gk20a_do_idle: failed to idle -
refcount 4 != 1

Hence skip requesting this lock in gk20a_idle()

Bug 200294536

Change-Id: I060075fdee1b68e1b5fa11baa44a3f5ce4917d94
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/1480777
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

2017-05-16 06:05:58 -07:00

..

gpu/nvgpu

gpu: nvgpu: skip taking g->busy_lock in gk20a_idle

2017-05-16 06:05:58 -07:00