svn commit: r189367 - head/sys/dev/pci

[M. Warner Losh]

In message: <200903041823.n24INmcc049524 at svn.freebsd.org>
            Robert Noland <rnoland at freebsd.org> writes:
: Author: rnoland
: Date: Wed Mar  4 18:23:48 2009
: New Revision: 189367
: URL: http://svn.freebsd.org/changeset/base/189367
: 
: Log:
:   Extend the management of PCIM_CMD_INTxDIS.
:   
:   We now explicitly enable INTx during bus_setup_intr() if it is needed.
:   Several of the ata drivers were managing this bit internally.  This is
:   better handled in pci and it should work for all drivers now.
:   
:   We also mask INTx during bus_teardown_intr() by setting this bit.
:   
:   Reviewed by:	jhb
:   MFC after:	3 days

Note: the INTxDIS bit is new in PCI 3.0, and has no effect on earlier
devices.  This should be highlighted in the comments somewhere...

Warner