Date: Thu, 13 Apr 2006 08:16:32 +0200 From: Christian Brueffer <chris@unixpages.org> To: Sam Leffler <sam@errno.com> Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org, "M. Warner Losh" <imp@bsdimp.com> Subject: Re: cvs commit: src/sys/dev/pccbb pccbb.c Message-ID: <20060413061632.GA1266@haakonia.hitnet.RWTH-Aachen.DE> In-Reply-To: <443D8BC1.1060200@errno.com> References: <200603300425.k2U4PjJH099559@repoman.freebsd.org> <20060412212843.GH1258@haakonia.hitnet.RWTH-Aachen.DE> <20060412.160552.35796990.imp@bsdimp.com> <443D8BC1.1060200@errno.com>
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[-- Attachment #1 --] On Wed, Apr 12, 2006 at 04:22:41PM -0700, Sam Leffler wrote: > M. Warner Losh wrote: > >In message: <20060412212843.GH1258@haakonia.hitnet.RWTH-Aachen.DE> > > Christian Brueffer <brueffer@FreeBSD.org> writes: > >: On Thu, Mar 30, 2006 at 04:25:45AM +0000, Warner Losh wrote: > >: > imp 2006-03-30 04:25:45 UTC > >: > > >: > FreeBSD src repository > >: > > >: > Modified files: > >: > sys/dev/pccbb pccbb.c > >: > Log: > >: > On some laptops, under very high loads, the socket event register > >read > >: > in the ISR doesn't read the actual socket event register, but instead > >: > reads garbage (usually 0xffffffff, but other times other things). > >: > This totally violates the PCI spec, but happens rarely enough that a > >: > workaround is in order. This adds one test when we have a real > >: > interrupt to service (which is very rare), and doesn't affect the > >: > usualy 'nothing to see here' case at all. > >: > > >: > Problem reported by many, but sam@ gave me this workaround after > >: > diagnosing the problem. > >: > > >: > >: This breaks pccard/cardbus support on my Thinkpad T41p (confirmed by > >: backing this change out). With this change, I just get an "Interrupt > >: storm detected on irq 5; throttling" message. > >: > >: What kind of debug info can I provide? > > > >A Thinkpad T41p. :-) > > > >Failing that, can you set hw.cbb.debug=1 and provide me with the > >output. > > I'm not seeing issues with this code on a t41p here so there may be > something else that matters. > I sent the debug output to Warner privately. Basically it works when the card is plugged in during system startup but not when I plug it in afterwards (doesn't produce any debug messages then either). This is the output when the card is plugged in during startup: Status is 0x30000186 Status is 0x30000920 cbb1: card inserted: event=0x00000000, state=30000920 cbb1: cbb_power: 3V Interrupt storm detected on "irq5:"; throttling interrupt source cardbus1: <network, ethernet> at device 0.0 (no driver attached) cbb1: cbb_power: 0V - Christan -- Christian Brueffer chris@unixpages.org brueffer@FreeBSD.org GPG Key: http://people.freebsd.org/~brueffer/brueffer.key.asc GPG Fingerprint: A5C8 2099 19FF AACA F41B B29B 6C76 178C A0ED 982D [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.2 (FreeBSD) iD4DBQFEPezAbHYXjKDtmC0RAl0SAJ0R7+71/3o+6tRjegy9cw2Osp6lHwCY+aU/ YgRHkvR11GQNLA+xo71HKw== =KLLd -----END PGP SIGNATURE-----
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