sna: Reuse the old cursor on the current CRTC

We only want to prevent sharing of physical handles across CRTC (on old
kernels). If we already have one assigned to a CRTC we know that it is
unshared and can keep using it.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

src/sna/sna_display.c

@@ -4674,11 +4674,10 @@ static struct sna_cursor *__sna_get_cursor(struct sna *sna, xf86CrtcPtr crtc)
 				return cursor;
 			}
 		}
-
-		cursor = to_sna_crtc(crtc)->cursor;
 	}
 
 	size = sna->cursor.size;
+	cursor = to_sna_crtc(crtc)->cursor;
 	if (cursor && cursor->alloc < 4*size*size)
 		cursor = NULL;