openwrt/target/linux/bcm27xx/patches-6.6/950-0031-drm-vc4-hvs-Initialize-the-dlist-allocation-list-ent.patch
Álvaro Fernández Rojas 8c405cdccc bcm27xx: add 6.6 kernel patches
The patches were generated from the RPi repo with the following command:
git format-patch v6.6.34..rpi-6.1.y

Some patches needed rebasing and, as usual, the applied and reverted, wireless
drivers, Github workflows, READMEs and defconfigs patches were removed.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2024-06-18 18:52:49 +02:00

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Diff

From bc1c5829ecc698e41379f461f1fd7e8d600b879f Mon Sep 17 00:00:00 2001
From: Maxime Ripard <maxime@cerno.tech>
Date: Wed, 25 Jan 2023 12:38:37 +0100
Subject: [PATCH 0031/1085] drm/vc4: hvs: Initialize the dlist allocation list
entry
The vc4_hvs_dlist_allocation structure has a list that we don't
initialize when we allocate a new instance.
This makes any call reading the list structure (such as list_empty) fail
with a NULL pointer dereference.
Let's make sure our list is always initialized.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
drivers/gpu/drm/vc4/vc4_hvs.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/gpu/drm/vc4/vc4_hvs.c
+++ b/drivers/gpu/drm/vc4/vc4_hvs.c
@@ -452,6 +452,8 @@ vc4_hvs_alloc_dlist_entry(struct vc4_hvs
if (!alloc)
return ERR_PTR(-ENOMEM);
+ INIT_LIST_HEAD(&alloc->node);
+
spin_lock_irqsave(&hvs->mm_lock, flags);
ret = drm_mm_insert_node(&hvs->dlist_mm, &alloc->mm_node,
dlist_count);