On Fri, 12 Mar 2010, loody wrote: > Dear all: > I add the urb log at the end of my letter. > my question is: > "len 0/122880", the first 0 means actually how many bytes it really > transfered, right? if so, why I still get ehci_urb_done even I didn't > get any interrupt and data is 0? You _did_ get an interrupt: > ehci ehci.0: itd_submit 1 urb 8338cc00 ep1in len 122880, 40 pkts 1 > uframes [83b8fb80] > ehci ehci.0: schedule devp 1 ep1in-iso period 1 start 89.0 > ehci ehci.0: itd_submit 1 urb 8338c800 ep1in len 122880, 40 pkts 1 > uframes [83b8fb80] > ehci ehci.0: irq status 0001 INT That is the interrupt. > ehci ehci.0: ehci_urb_done 1 urb 8338cc00 ep1in status 0 len 0/122880 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
