[RFC 3/5] drm/amdgpu: Skip not present rings in amdgpu_ctx_mgr_usage

[Tvrtko Ursulin]

From: Tvrtko Ursulin <tvrtko.ursulin at igalia.com>

Avoids a tiny bit of arithmetic and more importantly walking those empty
arrays up to amdgpu_sched_jobs slots and amdgpu_ctx_num_entities, both
which are pointless if there are no rings of the respective type.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at igalia.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
index 5cb33ac99f70..b409395f6e0c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
@@ -979,6 +979,9 @@ void amdgpu_ctx_mgr_usage(struct amdgpu_ctx_mgr *mgr,
 
 	idr_for_each_entry(&mgr->ctx_handles, ctx, id) {
 		for (hw_ip = 0; hw_ip < AMDGPU_HW_IP_NUM; ++hw_ip) {
+			if (!mgr->adev->num_ip_rings[hw_ip])
+				continue;
+
 			for (i = 0; i < amdgpu_ctx_num_entities[hw_ip]; ++i) {
 				struct amdgpu_ctx_entity *centity;
 				ktime_t spend;
-- 
2.44.0