hi Greg: 2014-06-17 22:25 GMT+08:00 Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>: > On Tue, Jun 17, 2014 at 10:07:38PM +0800, vichy wrote: >> hi all: >> I use kernel 3.8.0 > > That's a very old, and unsupported kernel version. I suggest you update Yes. it is pretty old kernel. But i have git diff the xhci-mem.c there is no log about " Transfer event TRB DMA ptr not part of current TD" I have no idea whether it is hardware issue. I just want to know any one bump the same problem before? appreciate your help, -- 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