mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-30 10:39:04 +00:00
8c405cdccc
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>
37 lines
1.4 KiB
Diff
37 lines
1.4 KiB
Diff
From 8cb88915f05f46f32b3f39285391cc8bcd31a7e8 Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.com>
|
|
Date: Wed, 29 Mar 2023 09:49:36 +0100
|
|
Subject: [PATCH 0430/1085] fbdev: Don't cancel deferred work if pagelist empty
|
|
|
|
Since [1], the fbdev deferred IO framework is careful to cancel
|
|
pending updates on close to prevent dirty pages being accessed after
|
|
they may have been reused. However, this is not necessary in the case
|
|
that the pagelist is empty, and drivers that don't make use of the
|
|
pagelist may have wanted updates cancelled for no good reason.
|
|
|
|
Avoid penalising fbdev drivers that don't make use of the pagelist by
|
|
making the cancelling of deferred IO on close conditional on there
|
|
being a non-empty pagelist.
|
|
|
|
See: https://github.com/raspberrypi/linux/issues/5398
|
|
|
|
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
|
|
|
|
[1] 3efc61d95259 ("fbdev: Fix invalid page access after closing deferred I/O devices")
|
|
---
|
|
drivers/video/fbdev/core/fb_defio.c | 3 ++-
|
|
1 file changed, 2 insertions(+), 1 deletion(-)
|
|
|
|
--- a/drivers/video/fbdev/core/fb_defio.c
|
|
+++ b/drivers/video/fbdev/core/fb_defio.c
|
|
@@ -313,7 +313,8 @@ static void fb_deferred_io_lastclose(str
|
|
struct page *page;
|
|
int i;
|
|
|
|
- flush_delayed_work(&info->deferred_work);
|
|
+ if (!list_empty(&info->fbdefio->pagereflist))
|
|
+ flush_delayed_work(&info->deferred_work);
|
|
|
|
/* clear out the mapping that we setup */
|
|
for (i = 0 ; i < info->fix.smem_len; i += PAGE_SIZE) {
|