gpu: nvgpu: gm20b: Fix pm refs in VPR info fetch

The code took reference to gk20a by using gk20a_busy_noresume(). This
function takes pm runtime reference only to the GPU, however, the code
dropped the reference by calling gk20a_idle() which also drops the
reference to the platform dependencies (host1x).

This patch modifies gm20b_mm_mmu_vpr_info_fetch_wait() to drop only
the GPU reference.

Change-Id: Ied59381fa302452356768ed59e8ad9af18284e3d
Signed-off-by: Arto Merilainen <amerilainen@nvidia.com>
Reviewed-on: http://git-master/r/482721
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gm20b/mm_gm20b.c b/drivers/gpu/nvgpu/gm20b/mm_gm20b.c
index ed5b5e0d..fd0d058f 100644
--- a/drivers/gpu/nvgpu/gm20b/mm_gm20b.c
+++ b/drivers/gpu/nvgpu/gm20b/mm_gm20b.c
@@ -267,7 +267,7 @@ int gm20b_mm_mmu_vpr_info_fetch(struct gk20a *g)
         ret = gm20b_mm_mmu_vpr_info_fetch_wait(g, VPR_INFO_FETCH_WAIT);
 
 fail:
-        gk20a_idle(g->dev);
+        pm_runtime_put(&g->dev->dev);
         return ret;
 }