Messages in this thread | | | Date | Tue, 7 Jan 2003 20:12:29 +0300 | From | Ivan Kokshaysky <> | Subject | Re: [patch 2.5] PCI: allow alternative methods for probing the BARs |
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On Mon, Jan 06, 2003 at 04:13:32PM -0800, Grant Grundler wrote: > Turning off MASTER will also disable the controller from responding > to MMIO ...ie USB subsystem can't touch the USB controller until > it's re-enabled (no USB interrupts).
No, MMIO is controlled by PCI_COMMAND_MEMORY bit. We'll just turn off DMA.
> I still have no idea which bridge implementations (vendor/model) > have this problem and thus no idea what the i386 code would need > to look like. I was hoping Ivan (or someone) might know.
Perhaps it will be i386-specific "PCI_FIXUP_EARLY" routine which turns of PCI_COMMAND_MASTER for all devices with a class code of PCI_CLASS_SERIAL_USB.
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