gpu: nvgpu: Add timeouts_disabled_refcount for enabling timeout

-timeouts will be enabled only when timeouts_disabled_refcount
 will reach 0
-timeouts_enabled debugfs will change from u32 type to file type
 to avoid race enabling/disabling timeout from debugfs and ioctl
-unify setting timeouts_enabled from debugfs and ioctl

Bug 1982434

Change-Id: I54bab778f1ae533872146dfb8d80deafd2a685c7
Signed-off-by: Seema Khowala <seemaj@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1588690
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/vgpu/vgpu_linux.c b/drivers/gpu/nvgpu/common/linux/vgpu/vgpu_linux.c
index 5d3598b5..c5572603 100644
--- a/drivers/gpu/nvgpu/common/linux/vgpu/vgpu_linux.c
+++ b/drivers/gpu/nvgpu/common/linux/vgpu/vgpu_linux.c
@@ -424,7 +424,8 @@ int vgpu_probe(struct platform_device *pdev)
         dma_set_max_seg_size(dev, UINT_MAX);
 
         gk20a->gr_idle_timeout_default = NVGPU_DEFAULT_GR_IDLE_TIMEOUT;
-        gk20a->timeouts_enabled = true;
+        gk20a->timeouts_disabled_by_user = false;
+        nvgpu_atomic_set(&gk20a->timeouts_disabled_refcount, 0);
 
         vgpu_create_sysfs(dev);
         gk20a_init_gr(gk20a);