usb: serial: handle -ENODEV quietly in generic_submit_read_urb

If a USB serial device (e.g. /dev/ttyUSB0) with an active program is
unplugged, an -ENODEV (19) error will be produced after it gives up
trying to resubmit a read.

  usb_serial_generic_submit_read_urb - usb_submit_urb failed: -19

Add -ENODEV as one of the permanent errors along with -EPERM that
usb_serial_generic_submit_read_urb() handles quietly without an error.

Signed-off-by: Jeremiah Mahler <jmmahler@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>

diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c
index 2d7207b9f6a4a679ea5c39f84c183e79f1b2673d..ccf1df7c4b80f3f7a596fa3d1d8904eb64a78db6 100644 (file)
--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -286,7 +286,7 @@ static int usb_serial_generic_submit_read_urb(struct usb_serial_port *port,
 
        res = usb_submit_urb(port->read_urbs[index], mem_flags);
        if (res) {
-               if (res != -EPERM) {
+               if (res != -EPERM && res != -ENODEV) {
                        dev_err(&port->dev,
                                        "%s - usb_submit_urb failed: %d\n",
                                        __func__, res);