gpu: nvgpu: set driver unload flag in shutdown

Call gk20a_driver_start_unload() in the beginning
of gk20a_pm_shutdown() so that we prevent new
calls to gk20a_busy()

Bug 200265373

Change-Id: I240cab4b505be4928341ab3deb13f37241d27aeb
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/1275486
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.c b/drivers/gpu/nvgpu/gk20a/gk20a.c
index ca2f7b33..5e56fc81 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.c
@@ -1357,6 +1357,8 @@ static void gk20a_pm_shutdown(struct platform_device *pdev)
 
         dev_info(&pdev->dev, "shutting down");
 
+        gk20a_driver_start_unload(platform->g);
+
         /* If GPU is already railgated,
          * just prevent more requests, and return */
         if (platform->is_railgated && platform->is_railgated(&pdev->dev)) {