USB: option.c: option_indat_callback: Resubmit some unsuccessful URBs
All unsuccessful (non-zero status) URBs were being dropped. After N_IN_URBs are
dropped you will no longer be able to receive data.
This patch resubmits unsuccessful URBs unless the status indicates that it should
be terminated. The statuses that indicate the URB should be terminated was
gathered from other similar drivers.
Signed-off-by: James Maki <jamescmaki@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index 84d0eda..6d0dfd7 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -1019,31 +1019,42 @@
dbg("%s: %p", __func__, urb);
endpoint = usb_pipeendpoint(urb->pipe);
- port = urb->context;
+ port = urb->context;
- if (status) {
+ switch (status) {
+ case 0:
+ /* success */
+ break;
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ /* this urb is terminated, clean up */
+ dbg("%s: urb shutting down with status: %d on endpoint %02x.",
+ __func__, status, endpoint);
+ return;
+ default:
dbg("%s: nonzero status: %d on endpoint %02x.",
__func__, status, endpoint);
- } else {
- tty = tty_port_tty_get(&port->port);
- if (urb->actual_length) {
- tty_insert_flip_string(tty, data, urb->actual_length);
- tty_flip_buffer_push(tty);
- } else
- dbg("%s: empty read urb received", __func__);
- tty_kref_put(tty);
-
- /* Resubmit urb so we continue receiving */
- if (status != -ESHUTDOWN) {
- err = usb_submit_urb(urb, GFP_ATOMIC);
- if (err && err != -EPERM)
- printk(KERN_ERR "%s: resubmit read urb failed. "
- "(%d)", __func__, err);
- else
- usb_mark_last_busy(port->serial->dev);
- }
-
+ goto exit;
}
+
+ if (urb->actual_length) {
+ tty = tty_port_tty_get(&port->port);
+ tty_insert_flip_string(tty, data, urb->actual_length);
+ tty_flip_buffer_push(tty);
+ tty_kref_put(tty);
+ } else
+ dbg("%s: empty read urb received", __func__);
+
+exit:
+ /* Resubmit urb so we continue receiving */
+ err = usb_submit_urb(urb, GFP_ATOMIC);
+ if (err && err != -EPERM)
+ printk(KERN_ERR "%s: resubmit read urb failed. "
+ "(%d)", __func__, err);
+ else
+ usb_mark_last_busy(port->serial->dev);
+
return;
}