gpu: nvgpu: note railgate_allowed in do_idle

The idling and unidling of deterministic channels in the
do_idle/do_unidle path assume that each deterministic channel holds a
power reference. This is no longer the case if railgating has been
allowed for a channel via the deterministic options ioctl which also
causes the channel to drop the power ref that it holds otherwise during
its lifetime.

All this is happening inside the deterministic_busy rwsem, which also
guards the ioctl changing those deterministic option states.

Bug 200327089

Change-Id: I9ce312bbaa459b3cf4a7541fa369186b78c3afdc
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1642310
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Alex Waterman <alexw@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

0 files changed, 0 insertions, 0 deletions