Date: Fri, 16 Jan 2009 22:22:30 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/dev/pci pci.c Message-ID: <200901162222.n0GMMgnF044944@repoman.freebsd.org>
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jhb 2009-01-16 22:22:30 UTC
FreeBSD src repository
Modified files:
sys/dev/pci pci.c
Log:
SVN rev 187348 on 2009-01-16 22:22:30Z by jhb
Disable decoding of BARs by devices before we trash the value in the BAR
by writing all 1's to it to determine its length. This fixes issues with
MCFG on at least some machines where a trashed BAR claimed subsequent
attempts at PCI config transactions because the addresses in the MCFG
window fell in the decoding range of the BAR.
In general it is a bad idea to leave the BARs enabled while we are
frobbing with them in this manner.
Sleuthing by: tegge
MFC after: 1 week
Revision Changes Path
1.367 +18 -0 src/sys/dev/pci/pci.c
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