[PATCH xf86-video-ati 1/4] Don't rely on randr_crtc->scanout_pixmap in drmmode_set_scanout_pixmap

[michel@xxxxxxxxxxx (Michel Dänzer)]

From: Michel Dänzer <michel.daenzer@xxxxxxx>

RRReplaceScanoutPixmap may set randr_crtc->scanout_pixmap = NULL before
we get here.

(Inspired by xserver commit f4c37eeee7953df1fe0e3196eda452acf0078e61)

Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>
---
 src/drmmode_display.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/src/drmmode_display.c b/src/drmmode_display.c
index 2cb5931..00a484b 100644
--- a/src/drmmode_display.c
+++ b/src/drmmode_display.c
@@ -1144,11 +1144,18 @@ drmmode_set_scanout_pixmap(xf86CrtcPtr crtc, PixmapPtr ppix)
 	RADEONInfoPtr info = RADEONPTR(crtc->scrn);
 
 	if (!ppix) {
-		if (crtc->randr_crtc->scanout_pixmap)
-			PixmapStopDirtyTracking(crtc->randr_crtc->scanout_pixmap,
-						drmmode_crtc->scanout[drmmode_crtc->scanout_id].pixmap);
-		drmmode_crtc_scanout_free(drmmode_crtc);
-		return TRUE;
+		ScreenPtr screen = crtc->scrn->pScreen;
+		PixmapDirtyUpdatePtr dirty;
+
+		xorg_list_for_each_entry(dirty, &screen->pixmap_dirty_list, ent) {
+			if (dirty->slave_dst !=
+			    drmmode_crtc->scanout[drmmode_crtc->scanout_id].pixmap)
+				continue;
+
+			PixmapStopDirtyTracking(dirty->src, dirty->slave_dst);
+			drmmode_crtc_scanout_free(drmmode_crtc);
+			return TRUE;
+		}
 	}
 
 	if (!drmmode_crtc_scanout_create(crtc, &drmmode_crtc->scanout[0],
-- 
2.10.1