[Bug 2322] Corruption of PCI config BAR1 of native PCIE boards on 64-bit archs

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https://bugs.freedesktop.org/show_bug.cgi?id=2322         
    




------- Additional Comments From mike.work@besm6.org  2005-01-18 15:42 -------
I have tracked this down to an off-by-1 error in hw/xfree86/common/xf86pciBus.c.
Function FindPCIVideoInfo(), lines ##292-409. [against CVS ver. 1.6]

When the HW claims a 64-bit BAR, the code for 64-bit platforms attemps to
construct a 64-bit long value, however, instead of reading BAR[i+1] for the
upper half, it gets BAR[i+2].

I am proposing 2 possible fixes for the problem, which are reflected in 2
attached patches. One (minimal) simply fixes the immediate problem at hand.

The other (aggressive) additionaly makes some rearrengements to the code, that,
I thought, were appropriate.

It also treats BAR5 specially in a way, that IMO is the most reasonable, as the
PCI spec. [both 2.3 and 3.0] remains silent on this issue.         
    
    
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