| Message ID | 20240312154834.26178-4-tzimmermann@suse.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm: Provide fbdev emulation per memory manager | expand |
Thomas Zimmermann <tzimmermann@suse.de> writes: > Clean up the pageref state as part of the lastclose helper. This > only requirs to clear the page's mapping field. The pageref and requires > page can stay in place for the next opened instance of the frame- > buffer file. > > With the change in the clean-up logic, here's no further need there's > to lookup pages during the lastclose cleanup. The code instead > uses the existing pagerefs in its look-up table. It also avoids > using smem_len, which some driver might not set correctly. > > Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> > --- Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
diff --git a/drivers/video/fbdev/core/fb_defio.c b/drivers/video/fbdev/core/fb_defio.c index bff1e300ed6bb..f23b1cbe67192 100644 --- a/drivers/video/fbdev/core/fb_defio.c +++ b/drivers/video/fbdev/core/fb_defio.c @@ -62,6 +62,14 @@ static struct fb_deferred_io_pageref *fb_deferred_io_pageref_lookup(struct fb_in return pageref; } +static void fb_deferred_io_pageref_clear(struct fb_deferred_io_pageref *pageref) +{ + struct page *page = pageref->page; + + if (page) + page->mapping = NULL; +} + static struct fb_deferred_io_pageref *fb_deferred_io_pageref_get(struct fb_info *info, unsigned long offset, struct page *page) @@ -330,16 +338,13 @@ EXPORT_SYMBOL_GPL(fb_deferred_io_open); static void fb_deferred_io_lastclose(struct fb_info *info) { - struct page *page; - int i; + unsigned long i; flush_delayed_work(&info->deferred_work); /* clear out the mapping that we setup */ - for (i = 0 ; i < info->fix.smem_len; i += PAGE_SIZE) { - page = fb_deferred_io_page(info, i); - page->mapping = NULL; - } + for (i = 0; i < info->npagerefs; ++i) + fb_deferred_io_pageref_clear(&info->pagerefs[i]); } void fb_deferred_io_release(struct fb_info *info)
Clean up the pageref state as part of the lastclose helper. This only requirs to clear the page's mapping field. The pageref and page can stay in place for the next opened instance of the frame- buffer file. With the change in the clean-up logic, here's no further need to lookup pages during the lastclose cleanup. The code instead uses the existing pagerefs in its look-up table. It also avoids using smem_len, which some driver might not set correctly. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> --- drivers/video/fbdev/core/fb_defio.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-)