drm/amdgpu: Skip the coredump collection on reset during driver reload

In passthrough environment, the driver triggers the mode-1 reset on
reload. The reset causes the core dump collection which is delayed task
and prevents driver from unloading until it is completed. Since we do
not need to collect data on "reset on reload" case, we can skip core
dump collection.

v2: Use the same flag to avoid calling amdgpu_reset_reg_dumps as well.
Signed-off-by: Ahmad Rehman <Ahmad.Rehman@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

@@ -5357,7 +5357,9 @@ int amdgpu_do_asic_reset(struct list_head *device_list_handle,
 	/* Try reset handler method first */
 	tmp_adev = list_first_entry(device_list_handle, struct amdgpu_device,
 				    reset_list);
-	amdgpu_reset_reg_dumps(tmp_adev);
+
+	if (!test_bit(AMDGPU_SKIP_COREDUMP, &reset_context->flags))
+		amdgpu_reset_reg_dumps(tmp_adev);
 
 	reset_context->reset_device_list = device_list_handle;
 	r = amdgpu_reset_perform_reset(tmp_adev, reset_context);
@@ -5430,7 +5432,8 @@ int amdgpu_do_asic_reset(struct list_head *device_list_handle,
 
 				vram_lost = amdgpu_device_check_vram_lost(tmp_adev);
 
-				amdgpu_coredump(tmp_adev, vram_lost, reset_context);
+				if (!test_bit(AMDGPU_SKIP_COREDUMP, &reset_context->flags))
+					amdgpu_coredump(tmp_adev, vram_lost, reset_context);
 
 				if (vram_lost) {
 					DRM_INFO("VRAM is lost due to GPU reset!\n");

drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c

@@ -2481,6 +2481,7 @@ static void amdgpu_drv_delayed_reset_work_handler(struct work_struct *work)
 
 	/* Use a common context, just need to make sure full reset is done */
 	set_bit(AMDGPU_SKIP_HW_RESET, &reset_context.flags);
+	set_bit(AMDGPU_SKIP_COREDUMP, &reset_context.flags);
 	r = amdgpu_do_asic_reset(&device_list, &reset_context);
 
 	if (r) {

drivers/gpu/drm/amd/amdgpu/amdgpu_reset.h

@@ -32,6 +32,7 @@ enum AMDGPU_RESET_FLAGS {
 
 	AMDGPU_NEED_FULL_RESET = 0,
 	AMDGPU_SKIP_HW_RESET = 1,
+	AMDGPU_SKIP_COREDUMP = 2,
 };
 
 struct amdgpu_reset_context {