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| author | jhb <jhb@FreeBSD.org> | 2007-11-28 22:22:05 +0000 |
|---|---|---|
| committer | jhb <jhb@FreeBSD.org> | 2007-11-28 22:22:05 +0000 |
| commit | 4a39f29f1b08c6b6d6b082dee8129524b1fda5e5 (patch) | |
| tree | 3d79f62f3b2c2c50d245c9c07dfef247d1b4d5e2 /sys | |
| parent | 77643d0653c438772894d85543f60055f3b967d6 (diff) | |
| download | FreeBSD-src-4a39f29f1b08c6b6d6b082dee8129524b1fda5e5.zip FreeBSD-src-4a39f29f1b08c6b6d6b082dee8129524b1fda5e5.tar.gz | |
MFamd64: 1.109 of pci_cfgreg.c which changes pci_cfgdisable() into a nop
for type #1 similar to what other OS's do.
MFC after: 3 days
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/i386/pci/pci_cfgreg.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/sys/i386/pci/pci_cfgreg.c b/sys/i386/pci/pci_cfgreg.c index 9bdfe29..e8be305 100644 --- a/sys/i386/pci/pci_cfgreg.c +++ b/sys/i386/pci/pci_cfgreg.c @@ -280,11 +280,15 @@ pci_cfgdisable(void) { switch (cfgmech) { case CFGMECH_1: - outl(CONF1_ADDR_PORT, 0); + /* + * Do nothing for the config mechanism 1 case. + * Writing a 0 to the address port can apparently + * confuse some bridges and cause spurious + * access failures. + */ break; case CFGMECH_2: outb(CONF2_ENABLE_PORT, 0); - outb(CONF2_FORWARD_PORT, 0); break; } } |
