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Patch brown-bag fix for bug 19017 (scrn->virtualX/virtualY 0 before PreInit)

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When a driver uses a crtc during device detection, the scrn has not yet been
configured and virtualX/virtualY are still zero. This caused the X server
to try and allocate a shadow frame buffer, which couldn't work.

Detect this by checking for zero virtualX/virtualY values.

Signed-off-by: Keith Packard <keithp@keithp.com>
(cherry picked from commit 063eb6743c)
This commit is contained in:
Keith Packard 2008-12-15 19:53:45 -08:00
parent ae2cbbff9f
commit 09039fb89f
1 changed files with 6 additions and 0 deletions
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6
hw/xfree86/modes/xf86Rotate.c
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@ -366,6 +366,12 @@ xf86CrtcFitsScreen (xf86CrtcPtr crtc, struct pict_f_transform *crtc_to_fb)
ScrnInfoPtr pScrn = crtc->scrn;
BoxRec b;
/* When called before PreInit, the driver is
* presumably doing load detect
*/
if (pScrn->virtualX == 0 || pScrn->virtualY == 0)
return TRUE;
b.x1 = 0;
b.y1 = 0;
b.x2 = crtc->mode.HDisplay;