Date: Sun, 01 Feb 2009 20:36:18 -0700 (MST) From: "M. Warner Losh" <imp@bsdimp.com> To: thompsa@FreeBSD.org Cc: src-committers@FreeBSD.org, svn-src-user@FreeBSD.org Subject: Re: svn commit: r187978 - user/thompsa/usb/sys/dev/usb2/ethernet Message-ID: <20090201.203618.1640016624.imp@bsdimp.com> In-Reply-To: <20090201213749.GJ32503@citylink.fud.org.nz> References: <200902010650.n116obU1045871@svn.freebsd.org> <20090201.142808.886478999.imp@bsdimp.com> <20090201213749.GJ32503@citylink.fud.org.nz>
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In message: <20090201213749.GJ32503@citylink.fud.org.nz> Andrew Thompson <thompsa@FreeBSD.org> writes: : On Sun, Feb 01, 2009 at 02:28:08PM -0700, M. Warner Losh wrote: : > In message: <200902010650.n116obU1045871@svn.freebsd.org> : > Andrew Thompson <thompsa@FreeBSD.org> writes: : > : + locked = mtx_owned(&sc->sc_mtx); : > : + if (!locked) : > : + AUE_LOCK(sc); : > : > You do know this is racy, right? : : Yea... It only get called unlocked during mii probe+attach so its fine. : I havnt actaully checked if its ok to hold a mutex during : mii_phy_probe() which would make this go away. You hold GIANT when probe+attach, which means I think you can't acquire any other locks... Warner
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