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Date: Mon, 8 Oct 2007 07:43:09 -0400 From: Scott <linux-kernel@...ecamel.eml.cc> To: Gerd Hoffmann <kraxel@...hat.com>, linux-kernel@...r.kernel.org Subject: Re: cx88 pci_abort messages On Oct 8, 2007, at 3:44 AM, Gerd Hoffmann wrote: > Scott wrote: >> On Sat, 2007-10-06 at 12:48 -0600, Robert Hancock wrote: >>>>> Oct 2 21:59:32 htpc cx88[0]: irq mpeg [0x80000] pci_abort* >>>>> Oct 2 21:59:32 htpc cx88[0]/2-mpeg: general errors: 0x0008000 > >> I assumed it was an interrupt issue based on the 'irq mepg' error, >> not a >> DMA issue. > > It's a DMA issue. The chip raised an irq to signal the error > condition > to the driver, thats why it is printed by the irq handler. Happened > while streamimg mpeg data. > > Havn't looked at the code for years now, but IIRC the 0x800000 is the > raw error code from some status register, pci_abort is the error > bit in > clear text, meaning some PCI DMA transfer was aborted. No idea why > though ... I went through and did the basics. Disabled SMP (it's a core 2 duo cpu), tried with noapic, nolapic settings, tried with pci=irqroute, and tried with acpi=off. Poking through the module code I noticd in cx88-mpeg.c the irq_debug option. I think this is the debug switch I want so I'll try to gather more info this week. At the very least it looks like it will help me walk through the code to get a better idea of what's going on. -- Scott - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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