gpu: nvgpu: exit pmu thread after boot

When the pmu reaches PMU_STATE_STARTED, exit from the nvgpu_pg_init_task
thread as it's no longer necessary. This prevents a possibly long wait
on the signaling condition, which would make Linux think that the thread
has been blocked and print a warning.

Bug 200317814

Change-Id: I4104896867ee13eb9d53b1b19b659a7839adb73f
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: http://git-master/r/1501504
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/common/pmu/pmu.c b/drivers/gpu/nvgpu/common/pmu/pmu.c
index fc72d1fc..15b57988 100644
--- a/drivers/gpu/nvgpu/common/pmu/pmu.c
+++ b/drivers/gpu/nvgpu/common/pmu/pmu.c
@@ -347,8 +347,8 @@ static int nvgpu_pg_init_task(void *arg)
                         pmu_setup_hw_enable_elpg(g);
                         break;
                 case PMU_STATE_STARTED:
-                        nvgpu_pmu_dbg(g, "PMU booted");
-                        break;
+                        nvgpu_pmu_dbg(g, "PMU booted, thread exiting");
+                        return 0;
                 default:
                         nvgpu_pmu_dbg(g, "invalid state");
                         break;