On Sad, 2005-09-17 at 00:12 -0400, Alan Stern wrote: > Where does early handoff install a fake interrupt handler for UHCI? I > don't see any in drivers/pci/quirks.c.
Fedora patches for 2.6.9 rather than the current code. > > You need them because an IRQ could be pending on the channel at the > > point you switch over or triggered on the switch and a few people saw > > this behaviour. > > Yes, that would be needed if you have edge-triggered interrupts. But > isn't PCI supposed to be level-triggered? Yes and at the time several people saw hangs on the changeover unless we cleared pending IRQ bits in the IRQ handler. That may have been related to various ACPI problems from back then. I don't know for sure. > > I'd like to see it shared but that means handoff belongs in the input > > layer code and the USB layer needs to call into it if appropriate. > > Why does it mean that? And why the input layer as opposed to the PCI > layer, where it is now? PCI layer makes even more sense yes ------------------------------------------------------- SF.Net email is sponsored by: Tame your development challenges with Apache's Geronimo App Server. Download it for free - -and be entered to win a 42" plasma tv or your very own Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
