[PATCH] drm/radeon: fix regression in dynpm due to multi-ring rework

[alexdeucher at gmail.com]

From: Alex Deucher <alexander.deucher at amd.com>

Not all asics have all rings, so make sure the ring is ready
before attempting to check it in the dynpm work handler.

Fixes:
https://bugzilla.kernel.org/show_bug.cgi?id=43367

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/radeon/radeon_pm.c |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
index 79642cd..7ae6066 100644
--- a/drivers/gpu/drm/radeon/radeon_pm.c
+++ b/drivers/gpu/drm/radeon/radeon_pm.c
@@ -793,9 +793,13 @@ static void radeon_dynpm_idle_work_handler(struct work_struct *work)
 		int i;
 
 		for (i = 0; i < RADEON_NUM_RINGS; ++i) {
-			not_processed += radeon_fence_count_emitted(rdev, i);
-			if (not_processed >= 3)
-				break;
+			struct radeon_ring *ring = &rdev->ring[i];
+
+			if (ring->ready) {
+				not_processed += radeon_fence_count_emitted(rdev, i);
+				if (not_processed >= 3)
+					break;
+			}
 		}
 
 		if (not_processed >= 3) { /* should upclock */
-- 
1.7.7.5