Problematic simba PCI bridge code in xorg

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Hi Dave,

Recently we've got a report of xorg crashing on an Ultra10 box, and 
corrupting the filesystem in the process. After some investigation I 
found the bug 8020 which you've filed against xorg at

https://bugs.freedesktop.org/show_bug.cgi?id=8020

That looked like it could be the reason for the crash, as the box in 
question has this simba PCI bridge. So I disabled the call to the 
sparcPciPciBridge function, by not defining ARCH_PCI_PCI_BRIDGE in 
hw/xfree86/os-support/bus/Pci.h and rebuilt it. The resulting server 
worked fine both on my Ultra5 (it has simba bridge in it, but it has 
worked even before the change) and Ultra10, which was crashing before. 
The problem seems to be solved, however I feel a bit uneasy about 
removing the code without understading the possible impact. Are there 
any possible negative consequences for such a removal? If the code is 
not useful, why is it still in xorg anyway?

Thanks a lot,
-- 
Jurij Smakov                                           jurij@xxxxxxxxx
Key: http://www.wooyd.org/pgpkey/                      KeyID: C99E03CC
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