Date: Wed, 1 Dec 1999 13:28:12 -0700 From: Nate Williams <nate@mt.sri.com> To: Mike Smith <msmith@FreeBSD.ORG> Cc: Warner Losh <imp@village.org>, mobile@FreeBSD.ORG Subject: Re: cvs commit: src/sys/pccard pccard.c src/sys/isa sio.c src/sys/dev/ed if_ed_pccard.c src/sys/dev/ep if_ep_pccard.c Message-ID: <199912012028.NAA01870@mt.sri.com> In-Reply-To: <199912012010.MAA00653@mass.cdrom.com> References: <199912011600.JAA02186@harmony.village.org> <199912012010.MAA00653@mass.cdrom.com>
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> > Spin limiters in the ISRs of drivers that support detach. Doing > > thinks like sio does with sc->gone (w/o the softc) and other > > techniques are going to be what is required to fix this. > > Again, soft state is not adequate. sc->gone can only be set if something > preempts the spinning interrupt handler. Correct. > In the old old code this only > worked because the pcic interrupt handler wasn't masked, so the detach > routine could preempt the device interrupt handler and set the gone flag. Do you have a better solution than this? This was the 'most' correct solution I could come up with. (I'd love to hear about a better solution than this). The only other solution I could envision was one involving re-writing all of the drivers to modify them so they would have timeouts reading hardware (difficult and time consuming), but this wouldn't work in newbus due to softc going away. :( Nate To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message
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