From: Lucas Stach <l.stach@pengutronix.de>
Date: Wed, 29 Nov 2017 13:33:57 +0000 (+0100)
Subject: drm/etnaviv: move submit free out of critical section
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=2e3a2dda2515cc85b8600e3d8a20d1d4a9100ebd;p=openwrt%2Fstaging%2Fblogic.git

drm/etnaviv: move submit free out of critical section

There is no need to hold the GPU lock while freeing the submit
object. Only move the retired submits from the GPU active list to
a temporary retire list under the GPU lock.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
---

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
index 072384f3637e..21d0d22f1168 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
@@ -1201,20 +1201,22 @@ static void retire_worker(struct work_struct *work)
 					       retire_work);
 	u32 fence = gpu->completed_fence;
 	struct etnaviv_gem_submit *submit, *tmp;
+	LIST_HEAD(retire_list);
 
 	mutex_lock(&gpu->lock);
 	list_for_each_entry_safe(submit, tmp, &gpu->active_submit_list, node) {
 		if (!dma_fence_is_signaled(submit->out_fence))
 			break;
 
-		list_del(&submit->node);
-
-		etnaviv_submit_put(submit);
+		list_move(&submit->node, &retire_list);
 	}
 
 	gpu->retired_fence = fence;
 
 	mutex_unlock(&gpu->lock);
+
+	list_for_each_entry_safe(submit, tmp, &retire_list, node)
+		etnaviv_submit_put(submit);
 }
 
 int etnaviv_gpu_wait_fence_interruptible(struct etnaviv_gpu *gpu,