File U_xfree86_set_pscrn_pscreen_before_driver_scree... of Package xorg-x11-server.26505

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File U_xfree86_set_pscrn_pscreen_before_driver_screeninit_is_called.patch of Package xorg-x11-server.26505

Git-commit: 69b782aa75bc06f11b8f9b532d5213f252c4c6c4
Author: Keith Packard <keithp@keithp.com>
Subject: [PATCH] xfree86: Set pScrn->pScreen before driver ScreenInit is called
Patch-Mainline: Upstream
References: fate#321052
Signed-off-by: Michal Srb <msrb@suse.com>

Any code called from the driver ScreenInit may want to refer to
pScrn->pScreen. As the function passed to AddScreen is the first place
the DDX sees a new screen, the generic code needs to make sure that
value is set before passing control to the video driver's
initialization code.

This was found by running a driver which didn't bother to set this
value when the initial colormap was installed; xf86RandR12LoadPalette
tried to use pScrn->pScreen and crashed.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97124
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-and-Tested-by: Michel Dänzer <michel.daenzer@amd.com>

Index: xorg-server-1.18.3/hw/xfree86/common/xf86Init.c
===================================================================
--- xorg-server-1.18.3.orig/hw/xfree86/common/xf86Init.c
+++ xorg-server-1.18.3/hw/xfree86/common/xf86Init.c
@@ -370,6 +370,15 @@ InstallSignalHandlers(void)
  * use a global. */
 static CARD32 HasVTValue = 1;
 
+static Bool
+xf86ScreenInit(ScreenPtr pScreen, int argc, char **argv)
+{
+    ScrnInfoPtr pScrn = xf86ScreenToScrn(pScreen);
+
+    pScrn->pScreen = pScreen;
+    return pScrn->ScreenInit (pScreen, argc, argv);
+}
+
 /*
  * InitOutput --
  *	Initialize screenInfo for all actually accessible framebuffers.
@@ -854,7 +863,7 @@ InitOutput(ScreenInfo * pScreenInfo, int
         pScrn->SetOverscan = NULL;
         pScrn->DriverFunc = NULL;
         pScrn->pScreen = NULL;
-        scr_index = AddGPUScreen(pScrn->ScreenInit, argc, argv);
+        scr_index = AddGPUScreen(xf86ScreenInit, argc, argv);
         xf86VGAarbiterUnlock(pScrn);
         if (scr_index == i) {
             dixSetPrivate(&screenInfo.gpuscreens[scr_index]->devPrivates,
@@ -882,7 +891,7 @@ InitOutput(ScreenInfo * pScreenInfo, int
         xf86Screens[i]->SetOverscan = NULL;
         xf86Screens[i]->DriverFunc = NULL;
         xf86Screens[i]->pScreen = NULL;
-        scr_index = AddScreen(xf86Screens[i]->ScreenInit, argc, argv);
+        scr_index = AddScreen(xf86ScreenInit, argc, argv);
         xf86VGAarbiterUnlock(xf86Screens[i]);
         if (scr_index == i) {
             /*

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File U_xfree86_set_pscrn_pscreen_before_driver_screeninit_is_called.patch of Package xorg-x11-server.26505

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