When I start X on a kernel where agpgart is included but no gart
device is found, X oopses on a null pointer dereference in radeon_ioremap.
The attached patch avoids the oops, but should be reviewed by
someone more knowledgeable about DRM than I.
--
Bjorn Helgaas - [EMAIL PROTECTED]
Linux Systems Operation R&D
Hewlett-Packard
diff -u -r -X /home/helgaas/exclude linux-hplso/drivers/char/drm/drm_memory.h
linux/drivers/char/drm/drm_memory.h
--- linux-hplso/drivers/char/drm/drm_memory.h Thu Jan 24 20:41:32 2002
+++ linux/drivers/char/drm/drm_memory.h Thu Jan 24 21:16:23 2002
@@ -322,7 +322,7 @@
}
#if __REALLY_HAVE_AGP
- if(dev->agp->cant_use_aperture == 0)
+ if(!dev->agp || dev->agp->cant_use_aperture == 0)
goto standard_ioremap;
list_for_each(list, &dev->maplist->head) {
@@ -382,7 +382,7 @@
DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
"Attempt to free NULL pointer\n");
#if __REALLY_HAVE_AGP
- else if(dev->agp->cant_use_aperture == 0)
+ else if(!dev->agp || dev->agp->cant_use_aperture == 0)
#else
else
#endif
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