gpu: nvgpu: remove redundant lock

"isr_enable_lock" was used to protect pmu's isr_enabled flag
and pmu enable/disable calls

Instead of this extra lock, we can reuse "isr_mutex" for this
purpose

Bug 200014542
Bug 200014887

Change-Id: Ifbb7d6108effc132266a20517820e470d52a7110
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/453348
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/gm20b/acr_gm20b.c b/drivers/gpu/nvgpu/gm20b/acr_gm20b.c
index 92a89f00..4ef25a13 100644
--- a/drivers/gpu/nvgpu/gm20b/acr_gm20b.c
+++ b/drivers/gpu/nvgpu/gm20b/acr_gm20b.c
@@ -1085,10 +1085,10 @@ int gm20b_init_pmu_setup_hw1(struct gk20a *g, struct flcn_bl_dmem_desc *desc,
         int err;
 
         gk20a_dbg_fn("");
-        mutex_lock(&pmu->isr_enable_lock);
+        mutex_lock(&pmu->isr_mutex);
         pmu_reset(pmu);
         pmu->isr_enabled = true;
-        mutex_unlock(&pmu->isr_enable_lock);
+        mutex_unlock(&pmu->isr_mutex);
 
         /* setup apertures - virtual */
         gk20a_writel(g, pwr_fbif_transcfg_r(GK20A_PMU_DMAIDX_UCODE),