[PATCH] drm/amdgpu: extend halt_if_hws_hang to MES

[Graham Sider <Graham.Sider@amd.com>]

Hang on MES timeout if halt_if_hws_hang is set to 1.

Signed-off-by: Graham Sider <Graham.Sider@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h    | 2 ++
 drivers/gpu/drm/amd/amdgpu/mes_v11_0.c | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 0e6ddf05c23c..9999c18e7d8e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -219,10 +219,12 @@ extern int amdgpu_use_xgmi_p2p;
 extern int sched_policy;
 extern bool debug_evictions;
 extern bool no_system_mem_limit;
+extern int halt_if_hws_hang;
 #else
 static const int __maybe_unused sched_policy = KFD_SCHED_POLICY_HWS;
 static const bool __maybe_unused debug_evictions; /* = false */
 static const bool __maybe_unused no_system_mem_limit;
+static const int __maybe_unused halt_if_hws_hang;
 #endif
 #ifdef CONFIG_HSA_AMD_P2P
 extern bool pcie_p2p;
diff --git a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
index e14f314902b1..d09f92d38ad1 100644
--- a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
@@ -129,6 +129,10 @@ static int mes_v11_0_submit_pkt_and_poll_completion(struct amdgpu_mes *mes,
 	if (r < 1) {
 		DRM_ERROR("MES failed to response msg=%d\n",
 			  x_pkt->header.opcode);
+
+		while (halt_if_hws_hang)
+			schedule();
+
 		return -ETIMEDOUT;
 	}
 
-- 
2.25.1