On Mon, 28 Dec 2009, Huang, FrankR wrote: > No problem , Alan. I can post the debug info. Which part do you want to > check? I can post it. Go ahead and post all of it. > The two controllers share the same IRQ. The cat /proc/interrupts result > for ohci and ehci is as below: > > 11: 1924 XT-PIC ehci_hcd:usb1, > ohci_hcd:usb2 That's why ohci_irq runs when you transfer file data. The data transfer causes the EHCI controller to issue interrupt requests, and the CPU has to call both interrupt routines (ehci_irq and ohci_irq) whenever one of the interrupts occurs. > When I use the udelay(1), the result is better and the mouse hang still > happen. But the hang time is delayed(around 30 mins) > When I use the udelay(100), the hang issue is hardly found. Please post the patch for your udelay(). Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
