From: Steven Xu <linuxkernel.xxz@gmail.com>
To: linux-kernel@vger.kernel.org
Subject: A QUESTION ABOUT USB DRIVER
Date: Mon, 11 Jan 2010 13:14:31 +0800 [thread overview]
Message-ID: <1fd295ee1001102114p1b74336q16bb35d973b40c1c@mail.gmail.com> (raw)
output: usb 1-1: device descriptor read/64, error -71
in drivers/usb/core/hub.c line 2250
when a udisk inserted run to here
for (j = 0; j < 3; ++j) {
buf->bMaxPacketSize0 = 0;
r = usb_control_msg(udev, usb_rcvaddr0pipe(),
USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
USB_DT_DEVICE << 8, 0,
buf, GET_DESCRIPTOR_BUFSIZE,
(i ? USB_CTRL_GET_TIMEOUT : 1000));
return r=-74,
WHAT IS THE POSSIBEL REASON FOR THIS?
THANKS!
next reply other threads:[~2010-01-11 5:14 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-11 5:14 Steven Xu [this message]
2010-01-11 8:25 ` Oliver Neukum
2010-01-12 14:45 ` Greg KH
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