[PATCH 28/29] xf86: make sure rotate calcs are done on the right screen boundaries

[Dave Airlie]

From: Dave Airlie <airlied at redhat.com>

This fixes a segfault where this code believes we are outside the screen
boundaries on a slave device, but we aren't.

Signed-off-by: Dave Airlie <airlied at redhat.com>
---
 hw/xfree86/modes/xf86Rotate.c |    6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/hw/xfree86/modes/xf86Rotate.c b/hw/xfree86/modes/xf86Rotate.c
index 31e0372..a393747 100644
--- a/hw/xfree86/modes/xf86Rotate.c
+++ b/hw/xfree86/modes/xf86Rotate.c
@@ -322,6 +322,12 @@ xf86CrtcFitsScreen(xf86CrtcPtr crtc, struct pict_f_transform *crtc_to_fb)
     /* When called before PreInit, the driver is
      * presumably doing load detect
      */
+    if (pScrn->is_gpu) {
+	ScreenPtr pScreen = xf86ScrnToScreen(pScrn);
+	if (pScreen->current_master)
+	    pScrn = xf86ScreenToScrn(pScreen->current_master);
+    }
+
     if (pScrn->virtualX == 0 || pScrn->virtualY == 0)
         return TRUE;
 
-- 
1.7.10.2