From e618834ef9608750a36d03d4aa9a9f931aa788d6 Mon Sep 17 00:00:00 2001 From: James Maki Date: Sun, 21 Mar 2010 12:53:59 -0500 Subject: [PATCH] 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 Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/option.c | 49 +++++++++++++++++++++++++++------------------ 1 file changed, 30 insertions(+), 19 deletions(-) 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 @@ static void option_indat_callback(struct urb *urb) dbg("%s: %p", __func__, urb); endpoint = usb_pipeendpoint(urb->pipe); - port = urb->context; - - if (status) { + port = urb->context; + + 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 { + goto exit; + } + + if (urb->actual_length) { 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_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__); - /* 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); - } +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; } -- 2.7.4