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? ehci ehci.0: submit_async 1 urb 83b8fb80 ep0out len 26, qtd a3a41180 [qh a3a44080] ehci ehci.0: irq status 0001 INT ehci ehci.0: ehci_urb_done 1 urb 83b8fb80 ep0out status 0 len 26/26 ehci ehci.0: irq status 0020 IAA ehci ehci.0: submit_async 1 urb 83b8fb80 ep0out len 0, qtd a3a41060 [qh a3a44080] ehci ehci.0: irq status 0001 INT ehci ehci.0: ehci_urb_done 1 urb 83b8fb80 ep0out status 0 len 0/0 ehci ehci.0: irq status 0020 IAA 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 ehci ehci.0: ehci_urb_done 1 urb 8338cc00 ep1in status 0 len 0/122880 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 164.0 ehci ehci.0: itd_submit 1 urb 8338c400 ep1in len 122880, 40 pkts 1 uframes [83b8fb80] ehci ehci.0: irq status 0001 INT ehci ehci.0: ehci_urb_done 1 urb 8338cc00 ep1in status 0 len 0/122880 ehci ehci.0: itd_submit 1 urb 8338cc00 ep1in len 122880, 40 pkts 1 uframes [83b8fb80] ehci ehci.0: ehci_urb_done 1 urb 8338c800 ep1in status 0 len 0/122880 ehci ehci.0: itd_submit 1 urb 8338c800 ep1in len 122880, 40 pkts 1 uframes [83b8fb80] ehci ehci.0: ehci_urb_done 1 urb 8338cc00 ep1in status 0 len 0/122880 ehci ehci.0: itd_submit 1 urb 8338cc00 ep1in len 122880, 40 pkts 1 uframes [83b8fb80] ehci ehci.0: ehci_urb_done 1 urb 8338c800 ep1in status 0 len 0/122880 ehci ehci.0: itd_submit 1 urb 8338c800 ep1in len 122880, 40 pkts 1 uframes [83b8fb80] ehci ehci.0: ehci_urb_done 1 urb 8338cc00 ep1in status 0 len 0/122880 ehci ehci.0: itd_submit 1 urb 8338cc00 ep1in len 122880, 40 pkts 1 uframes [83b8fb80] ehci ehci.0: ehci_urb_done 1 urb 8338c800 ep1in status 0 len 0/122880 ehci ehci.0: itd_submit 1 urb 8338c800 ep1in len 122880, 40 pkts 1 uframes [83b8fb80] ehci ehci.0: ehci_urb_done 1 urb 8338cc00 ep1in status 0 len 0/122880 ehci ehci.0: itd_submit 1 urb 8338cc00 ep1in len 122880, 40 pkts 1 uframes [83b8fb80] ehci ehci.0: ehci_urb_done 1 urb 8338c800 ep1in status 0 len 0/122880 ehci ehci.0: itd_submit 1 urb 8338c800 ep1in len 122880, 40 pkts 1 uframes [83b8fb80] appreciate your help, miloody -- 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
