On Iau, 2004-09-02 at 20:03, Aleksey Gorelov wrote: > Basically, in a case of legacy free BIOS, HC is not in > SMM mode, and USB IRQ is routed to PCI IRQ line and generates > interrupts. When this IRQ is enabled in PIC (by driver that > starts before HC driver), system is flooded with interrupts.
The BIOS should not be leaving the device generating interrupts surely ? If that IRQ line ends up shared we are in trouble at boot time. > One solution is to reset HC, but it takes some time (at > least 50ms). I agree that it might duplicate SOME code in HC > driver, but HC init executes too late. Well, if handoff has > been done early, it might not be necessary to do the same in > HC driver. We don't always want to hand off. Some setups only work in USB legacy mode because of other bugs. Thats why the SMM fixup I did for E750x is triggered in specific cases. We can do such things with DMI table blacklists easily enough. My E750x fix already duplicates some of the hand off code so we are going to need it anyway and if there are more reasons for needing it then so be it. I happened to only need to fix UHCI thats all. Alan ------------------------------------------------------- This SF.Net email is sponsored by BEA Weblogic Workshop FREE Java Enterprise J2EE developer tools! Get your free copy of BEA WebLogic Workshop 8.1 today. http://ads.osdn.com/?ad_id=5047&alloc_id=10808&op=click _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
