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()=20 >> in it's attach() function, so that we can disable specific adapters=20= >> through kenv hint.ix.0.disabled=3D1.. >=20 > That is not universally supported (i.e. it's not a part of new-bus=20 > specifically). For buses that support hinted devices, they do all = generally=20 > support being able to disable a hinted device, but disabling = bus-enumerated=20 > devices is not generally supported. >=20 FYI, I submitted a patch to Jack to add this in all of the e1000/ixgbe = drivers. Setting a disabled=3D"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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