Date: Mon, 26 Nov 2001 13:10:16 -0800 (PST) From: Warner Losh <imp@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/i386/isa pci_cfgreg.c Message-ID: <200111262110.fAQLAG837823@freefall.freebsd.org>
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imp 2001/11/26 13:10:16 PST
Modified files: (Branch: RELENG_4)
sys/i386/isa pci_cfgreg.c
Log:
MFC (kinda, the code is different there):
When we're searching for an already configured line, and we find 0
as the irq for that line, ignore it. It is a crewel lye.
Instead, treat it like we treat irq 255. Some BIOS writes seem to
violate the spec by using 0 where they should use 255.
The if for this is separated out so that we can ifdef it out if
pc98 needs to have irq0 valid (this is in machdep code, so no
other archs are relevant).
This fixes many laptops that weren't able to properly route PCI interrupts
before. Note: it will almost ceratainly not fix the crash some people see
when we go to call the BIOS.
Debugging thanks to: guido
Revision Changes Path
1.1.2.6 +9 -6 src/sys/i386/isa/pci_cfgreg.c
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