Date: Mon, 23 May 2011 15:08:05 -0400 From: Andrew Boyer <aboyer@averesystems.com> To: John Baldwin <jhb@freebsd.org> Cc: jfv@gmail.com, freebsd-hackers@freebsd.org, philip-freebsd1@soeberg.net Subject: Re: device_detach() on a device used by ixgbe driver (FreeBSD 7-STABLE through to 9-CURRENT) Message-ID: <EE06CEF1-B4A1-46A4-9438-A883EFCFB7B3@averesystems.com> In-Reply-To: <201105231032.20084.jhb@freebsd.org> References: <4DDA6B95.3090704@soeberg.net> <201105231032.20084.jhb@freebsd.org>
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On May 23, 2011, at 10:32 AM, John Baldwin wrote: > On Monday, May 23, 2011 10:13:41 am Philip Soeberg wrote: >> I would also expect the ixgbe.c driver to do a quick resource_disabled() >> in it's attach() function, so that we can disable specific adapters >> through kenv hint.ix.0.disabled=1.. > > That is not universally supported (i.e. it's not a part of new-bus > specifically). For buses that support hinted devices, they do all generally > support being able to disable a hinted device, but disabling bus-enumerated > devices is not generally supported. > FYI, I submitted a patch to Jack to add this in all of the e1000/ixgbe drivers. Setting a disabled="1" hint causes the attach to fail with ENXIO. I don't know if it's 'correct' or not but it serves a purpose in our testing and I thought it would be useful for others. -Andrew -------------------------------------------------- Andrew Boyer aboyer@averesystems.com
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