Date: Tue, 20 Jul 1999 15:58:21 -0700 (PDT) From: Julian Elischer <julian@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/pci ide_pci.c Message-ID: <199907202258.PAA86174@freefall.freebsd.org>
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julian 1999/07/20 15:58:21 PDT
Modified files: (Branch: RELENG_3)
sys/pci ide_pci.c
Log:
MFC: 1.36
Allow Cyrix 5530 based UltraDMA IDE controllers to co-exist with other
devices on the PCI bus.
This is a workaround for a bug in the Cx5530 PCI bus logic that will
hog the PCI bus if the disk is fast enough. UDMA mode 2 is fast enough
to make this happen so limit the drives to mode 1. The symptom is
missed interrupts and sio silo overflows at high async speeds.
Revision Changes Path
1.28.2.1 +125 -100 src/sys/pci/ide_pci.c
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