[Intel-gfx] [PATCH] drm/i915/fdinfo: Don't show engine classes not present

[Tvrtko Ursulin]

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

Stop displaying engine classes with no engines - it is not a huge problem
if they are shown, since the values will correctly be all zeroes, but it
does count as misleading.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Fixes: 055634e4b62f ("drm/i915: Expose client engine utilisation via fdinfo")
Cc: Umesh Nerlige Ramappa <umesh.nerlige.ramappa at intel.com>
---
 drivers/gpu/drm/i915/i915_drm_client.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drm_client.c b/drivers/gpu/drm/i915/i915_drm_client.c
index 18d38cb59923..b09d1d386574 100644
--- a/drivers/gpu/drm/i915/i915_drm_client.c
+++ b/drivers/gpu/drm/i915/i915_drm_client.c
@@ -116,8 +116,9 @@ show_client_class(struct seq_file *m,
 		total += busy_add(ctx, class);
 	rcu_read_unlock();
 
-	seq_printf(m, "drm-engine-%s:\t%llu ns\n",
-		   uabi_class_names[class], total);
+	if (capacity)
+		seq_printf(m, "drm-engine-%s:\t%llu ns\n",
+			   uabi_class_names[class], total);
 
 	if (capacity > 1)
 		seq_printf(m, "drm-engine-capacity-%s:\t%u\n",
-- 
2.34.1