drm/amdgpu: give warning before sleep in kiq_r/wreg

to catch error that may schedule in atomic context early on

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -167,6 +167,9 @@ uint32_t amdgpu_virt_kiq_rreg(struct amdgpu_device *adev, uint32_t reg)
 	if (r < 1 && (adev->in_gpu_reset || in_interrupt()))
 		goto failed_kiq_read;
 
+	if (in_interrupt())
+		might_sleep();
+
 	while (r < 1 && cnt++ < MAX_KIQ_REG_TRY) {
 		msleep(MAX_KIQ_REG_BAILOUT_INTERVAL);
 		r = amdgpu_fence_wait_polling(ring, seq, MAX_KIQ_REG_WAIT);
@@ -212,7 +215,11 @@ void amdgpu_virt_kiq_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v)
 	if (r < 1 && (adev->in_gpu_reset || in_interrupt()))
 		goto failed_kiq_write;
 
+	if (in_interrupt())
+		might_sleep();
+
 	while (r < 1 && cnt++ < MAX_KIQ_REG_TRY) {
+
 		msleep(MAX_KIQ_REG_BAILOUT_INTERVAL);
 		r = amdgpu_fence_wait_polling(ring, seq, MAX_KIQ_REG_WAIT);
 	}