Date: Fri, 12 Mar 2010 07:47:56 +0000 From: "Robert N. M. Watson" <rwatson@freebsd.org> To: Qing Li <qingli@freebsd.org> Cc: Juli Mallett <jmallett@freebsd.org>, svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r205024 - head/sys/net Message-ID: <DED0E826-F9A4-4932-8A84-CD4B5FED8C62@freebsd.org> In-Reply-To: <9ace436c1003111618t28dba8d8x19aeff2acff0c489@mail.gmail.com> References: <201003111756.o2BHukJu042449@svn.freebsd.org> <alpine.BSF.2.00.1003112128020.97017@fledge.watson.org> <9ace436c1003111530s3bd0de9cq451671909fb6aa64@mail.gmail.com> <eaa228be1003111535s12febe62x91124b0a015fd0ff@mail.gmail.com> <9ace436c1003111539t2af8439cn315c695d4b90e28d@mail.gmail.com> <eaa228be1003111607s4e78fe73k26a67161642d510d@mail.gmail.com> <9ace436c1003111618t28dba8d8x19aeff2acff0c489@mail.gmail.com>
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On Mar 12, 2010, at 12:18 AM, Qing Li wrote: > You definitely have a very good point here. I was a bit surprised > during debugging that the link state is not consistently initialized > and by far not enforced across all of the drivers. Admittedly I = checked > the most commonly deployed devices and they are in good state. >=20 > I certainly appreciate your patience on this one and will try to get > it resolved quickly. One of the reasons drivers don't do this consistently his that = historically, hardware has not consistently supported link state = detection. This now does seem to be a standard feature, but I think it = would be useful to continue to support some notion of a driver not = supporting it, hence my thoughts on a link state capability: only test = link state if the driver can implement it. Otherwise, you end up with a = link state undefined state, which likely comes to much the same thing, = and is presumably what in practice you get today on drivers that don't = set it. Robert=
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