Date: Tue, 9 Jun 2009 13:44:17 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/dev/acpica acpi_pcib_acpi.c Message-ID: <200906091344.n59DiYdM093270@repoman.freebsd.org>
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jhb 2009-06-09 13:44:17 UTC
FreeBSD src repository
Modified files:
sys/dev/acpica acpi_pcib_acpi.c
Log:
SVN rev 193829 on 2009-06-09 13:44:17Z by jhb
Rework the _BBN handling for Host-PCI bridges. Previously we only trusted
a _BBN value of 0 if it was for the first bridge encountered since some
older systems returned _BBN of 0 for all bridges. However, some newer
systems enumerate bridges with non-zero _BBN before bus 0 which is
perfectly valid. Handle both cases by trusting the first bridge that has
a _BBN of 0 and falling back to reading from non-standard config registers
only for subsequent bridges with a _BBN of 0. We also only perform this
check for segment (domain) 0. We assume that _BBN is always correct
for segments other than 0.
Tested by: Josef Moellers josef.moellers at fujitsu
MFC after: 1 week
Revision Changes Path
1.58 +25 -18 src/sys/dev/acpica/acpi_pcib_acpi.c
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