openwrt/target/linux/bcm27xx/patches-6.6/950-0032-drm-vc4-hvs-Move-the-dlist-allocation-destruction-to.patch

From 9e2b5f6b8d74b18c96521c3e9ddd3f7fc75d917f Mon Sep 17 00:00:00 2001
From: Maxime Ripard <maxime@cerno.tech>
Date: Wed, 25 Jan 2023 12:54:36 +0100
Subject: [PATCH 0032/1085] drm/vc4: hvs: Move the dlist allocation destruction
 to a function

We'll need to destroy a dlist allocation in multiple code paths, so
let's move it to a separate function.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
 drivers/gpu/drm/vc4/vc4_hvs.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

--- a/drivers/gpu/drm/vc4/vc4_hvs.c
+++ b/drivers/gpu/drm/vc4/vc4_hvs.c
@@ -471,6 +471,18 @@ vc4_hvs_alloc_dlist_entry(struct vc4_hvs
 	return alloc;
 }
 
+static void vc4_hvs_free_dlist_entry_locked(struct vc4_hvs *hvs,
+					    struct vc4_hvs_dlist_allocation *alloc)
+{
+	lockdep_assert_held(&hvs->mm_lock);
+
+	if (!list_empty(&alloc->node))
+		list_del(&alloc->node);
+
+	drm_mm_remove_node(&alloc->mm_node);
+	kfree(alloc);
+}
+
 void vc4_hvs_mark_dlist_entry_stale(struct vc4_hvs *hvs,
 				    struct vc4_hvs_dlist_allocation *alloc)
 {
@@ -558,9 +570,7 @@ static void vc4_hvs_dlist_free_work(stru
 		if (!vc4_hvs_frcnt_lte(cur->target_frame_count, frcnt))
 			continue;
 
-		list_del(&cur->node);
-		drm_mm_remove_node(&cur->mm_node);
-		kfree(cur);
+		vc4_hvs_free_dlist_entry_locked(hvs, cur);
 	}
 	spin_unlock_irqrestore(&hvs->mm_lock, flags);
 }