This reverts commit 7f5cc4a3e5e4c5a38e5748defc952e45278f7a70. Needed to restore the fbdev damage worker. There have been bug reports about locking order [1] and incorrectly takens branches. [2] Restore the damage worker until these problems have been resovled. Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx> Link: https://intel-gfx-ci.01.org/tree/drm-tip/fi-kbl-8809g.html # 1 Link: https://lore.kernel.org/dri-devel/20221115115819.23088-6-tzimmermann@xxxxxxx/T/#m06eedc0a468940e4cbbd14ca026733b639bc445a # 2 --- drivers/gpu/drm/drm_fb_helper.c | 9 +-------- drivers/video/fbdev/core/fb_defio.c | 16 ---------------- include/linux/fb.h | 1 - 3 files changed, 1 insertion(+), 25 deletions(-) diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index c0e9a977a3b3c..cdbf03e941b2b 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -599,16 +599,9 @@ static void drm_fb_helper_add_damage_clip(struct drm_fb_helper *helper, u32 x, u static void drm_fb_helper_damage(struct drm_fb_helper *helper, u32 x, u32 y, u32 width, u32 height) { - struct fb_info *info = helper->info; - drm_fb_helper_add_damage_clip(helper, x, y, width, height); - /* - * The current fbdev emulation only flushes buffers if a damage - * update is necessary. And we can assume that deferred I/O has - * been enabled as damage updates require deferred I/O for mmap. - */ - fb_deferred_io_schedule_flush(info); + schedule_work(&helper->damage_work); } /* diff --git a/drivers/video/fbdev/core/fb_defio.c b/drivers/video/fbdev/core/fb_defio.c index dec678f72a42f..c730253ab85ce 100644 --- a/drivers/video/fbdev/core/fb_defio.c +++ b/drivers/video/fbdev/core/fb_defio.c @@ -332,19 +332,3 @@ void fb_deferred_io_cleanup(struct fb_info *info) mutex_destroy(&fbdefio->lock); } EXPORT_SYMBOL_GPL(fb_deferred_io_cleanup); - -void fb_deferred_io_schedule_flush(struct fb_info *info) -{ - struct fb_deferred_io *fbdefio = info->fbdefio; - - if (WARN_ON_ONCE(!fbdefio)) - return; /* bug in driver logic */ - - /* - * There's no requirement from callers to schedule the - * flush immediately. Rather schedule the worker with a - * delay and let a few more writes pile up. - */ - schedule_delayed_work(&info->deferred_work, fbdefio->delay); -} -EXPORT_SYMBOL_GPL(fb_deferred_io_schedule_flush); diff --git a/include/linux/fb.h b/include/linux/fb.h index 3a822e4357b12..e6b8e7ad7ac80 100644 --- a/include/linux/fb.h +++ b/include/linux/fb.h @@ -663,7 +663,6 @@ extern void fb_deferred_io_open(struct fb_info *info, struct inode *inode, struct file *file); extern void fb_deferred_io_cleanup(struct fb_info *info); -extern void fb_deferred_io_schedule_flush(struct fb_info *info); extern int fb_deferred_io_fsync(struct file *file, loff_t start, loff_t end, int datasync); -- 2.38.1
