gpu:nvgpu: Invalidate rpc buffer

Set rpc buffer to 0xFF instead of 0x0 to handle fucntions with rpc id 0

Change-Id: Ife692d9fd19008e225975e41bb13e53522283a54
Signed-off-by: Vaikundanathan S <vaikuns@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1702133
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: Mahantesh Kumbar <mkumbar@nvidia.com>
Tested-by: Mahantesh Kumbar <mkumbar@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/common/pmu/pmu_ipc.c b/drivers/gpu/nvgpu/common/pmu/pmu_ipc.c
index d1058864..a00c2a5e 100644
--- a/drivers/gpu/nvgpu/common/pmu/pmu_ipc.c
+++ b/drivers/gpu/nvgpu/common/pmu/pmu_ipc.c
@@ -1148,7 +1148,7 @@ int nvgpu_pmu_rpc_execute(struct nvgpu_pmu *pmu, struct nv_pmu_rpc_header *rpc,
          */
         if (is_copy_back) {
                 /* clear buff */
-                memset(rpc_buff, 0, size_rpc);
+                memset(rpc_buff, 0xFF, size_rpc);
                 /* wait till RPC execute in PMU & ACK */
                 pmu_wait_message_cond(pmu, gk20a_get_gr_idle_timeout(g),
                         &((struct nv_pmu_rpc_header *)rpc_buff)->function,