From a8168153037f2cfb9739285b92896c0e24872518 Mon Sep 17 00:00:00 2001
From: Alexey Sheplyakov <asheplyakov@altlinux.org>
Date: Wed, 27 Nov 2019 20:50:58 +0400
Subject: [PATCH] Don't crash X server if GPU acceleration is not available
Commit d1d8e3c8d0a0a0394d395eba171460501745209b causes X server
to fail on startup when GPU acceleration is not working (or is
disabled). The reason is that `radeon_get_pixmap_bo` function
gets called too early (before EXA has been initialized) and
fails with an assert:
#0 __GI_raise (sig=<optimized out>) at ../sysdeps/unix/sysv/linux/raise.c:50
#1 0x76ab1c6c in __GI_abort () at abort.c:79
#2 0x76ac0b64 in __assert_fail_base (fmt=0x76bfbce4 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=0x7658c80c "key->initialized", file=<optimized out>, line=121,
function=0x7658d040 <__PRETTY_FUNCTION__.10607> "dixGetPrivateAddr") at assert.c:92
#3 0x76ac0c0c in __GI___assert_fail (assertion=0x7658c80c "key->initialized", file=0x7658c9d0 "../include/privates.h", line=121,
function=0x7658d040 <__PRETTY_FUNCTION__.10607> "dixGetPrivateAddr") at assert.c:101
#4 0x76579e6c in dixGetPrivateAddr (key=<optimized out>, key=<optimized out>, privates=<optimized out>) at ../include/privates.h:121
#5 0x7657a954 in dixGetPrivateAddr (key=<optimized out>, key=<optimized out>, privates=<optimized out>) at exa.c:70
#6 dixGetPrivate (key=<optimized out>, privates=<optimized out>) at ../include/privates.h:136
#7 exaGetPixmapDriverPrivate (pPix=<optimized out>) at exa.c:68
#8 0x7623d460 in radeon_get_pixmap_bo (pPix=0x71c1b8) at radeon.h:804
#9 radeon_get_pixmap_handle (pixmap=0x71c1b8, handle=0x7fa22328) at radeon_bo_helper.c:357
#10 0x76244458 in radeon_pixmap_get_fb (pix=0x71c1b8) at radeon.h:886
#11 drmmode_set_mode_major (crtc=0x691860, mode=0x69191c, rotation=<optimized out>, x=<optimized out>, y=<optimized out>) at drmmode_display.c:918
#12 0x762467e8 in drmmode_set_desired_modes (pScrn=0x67c678, drmmode=<optimized out>, set_hw=1) at drmmode_display.c:3128
#13 0x0047bfa4 in MapWindow (client=0x669ec8, pWin=0x7206c0) at window.c:2722
#14 MapWindow (pWin=0x7206c0, client=0x669ec8) at window.c:2665
#15 0x00449650 in dix_main (argc=3, argv=0x7fa22604, envp=<optimized out>) at main.c:247
#16 0x76ab2198 in __libc_start_main (main=0x42db10 <main>, argc=3, argv=0x7fa22604, init=<optimized out>, fini=0x606434 <__libc_csu_fini>, rtld_fini=0x77229930 <_dl_fini>,
stack_end=0x7fa225e0) at libc-start.c:308
#17 0x0042db80 in __start () at ../sysdeps/mips/start.S:110
Don't call `exaGetPixmapDriverPrivate` if the acceleration (EXA) is not
enabled [yet] to avoid the problem.
Closes: https://gitlab.freedesktop.org/xorg/driver/xf86-video-ati/issues/188
Closes: https://bugzilla.altlinux.org/show_bug.cgi?id=37539
---
src/radeon.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/src/radeon.h b/src/radeon.h
index 2c913466..e4a2ba66 100644
--- a/src/radeon.h
+++ b/src/radeon.h
@@ -790,8 +790,8 @@ static inline Bool radeon_set_pixmap_bo(PixmapPtr pPix, struct radeon_buffer *bo
static inline struct radeon_buffer *radeon_get_pixmap_bo(PixmapPtr pPix)
{
-#ifdef USE_GLAMOR
RADEONInfoPtr info = RADEONPTR(xf86ScreenToScrn(pPix->drawable.pScreen));
+#ifdef USE_GLAMOR
if (info->use_glamor) {
struct radeon_pixmap *priv;
@@ -799,7 +799,7 @@ static inline struct radeon_buffer *radeon_get_pixmap_bo(PixmapPtr pPix)
return priv ? priv->bo : NULL;
} else
#endif
- {
+ if (info->accelOn) {
struct radeon_exa_pixmap_priv *driver_priv;
driver_priv = exaGetPixmapDriverPrivate(pPix);
return driver_priv ? driver_priv->bo : NULL;
@@ -896,7 +896,7 @@ radeon_pixmap_get_fb(PixmapPtr pix)
handle);
}
- return *fb_ptr;
+ return fb_ptr ? *fb_ptr : NULL;
}
--
2.24.1
