USB: serial: option: clean up urb->status usage

This done in anticipation of removal of urb->status, which will make
that patch easier to review and apply in the future.

Cc: <linux-usb-devel@lists.sourceforge.net>
Cc: Matthias Urlichs <smurf@smurf.noris.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index b37d65f..84c12b5 100644 (file)
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -416,15 +416,16 @@ static void option_indat_callback(struct urb *urb)
        struct usb_serial_port *port;
        struct tty_struct *tty;
        unsigned char *data = urb->transfer_buffer;
+       int status = urb->status;
 
        dbg("%s: %p", __FUNCTION__, urb);
 
        endpoint = usb_pipeendpoint(urb->pipe);
        port = (struct usb_serial_port *) urb->context;
 
-       if (urb->status) {
+       if (status) {
                dbg("%s: nonzero status: %d on endpoint %02x.",
-                   __FUNCTION__, urb->status, endpoint);
+                   __FUNCTION__, status, endpoint);
        } else {
                tty = port->tty;
                if (urb->actual_length) {
@@ -436,7 +437,7 @@ static void option_indat_callback(struct urb *urb)
                }
 
                /* Resubmit urb so we continue receiving */
-               if (port->open_count && urb->status != -ESHUTDOWN) {
+               if (port->open_count && status != -ESHUTDOWN) {
                        err = usb_submit_urb(urb, GFP_ATOMIC);
                        if (err)
                                printk(KERN_ERR "%s: resubmit read urb failed. "
@@ -471,6 +472,7 @@ static void option_outdat_callback(struct urb *urb)
 static void option_instat_callback(struct urb *urb)
 {
        int err;
+       int status = urb->status;
        struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
        struct option_port_private *portdata = usb_get_serial_port_data(port);
        struct usb_serial *serial = port->serial;
@@ -478,7 +480,7 @@ static void option_instat_callback(struct urb *urb)
        dbg("%s", __FUNCTION__);
        dbg("%s: urb %p port %p has data %p", __FUNCTION__,urb,port,portdata);
 
-       if (urb->status == 0) {
+       if (status == 0) {
                struct usb_ctrlrequest *req_pkt =
                                (struct usb_ctrlrequest *)urb->transfer_buffer;
 
@@ -509,10 +511,10 @@ static void option_instat_callback(struct urb *urb)
                                req_pkt->bRequestType,req_pkt->bRequest);
                }
        } else
-               dbg("%s: error %d", __FUNCTION__, urb->status);
+               dbg("%s: error %d", __FUNCTION__, status);
 
        /* Resubmit urb so we continue receiving IRQ data */
-       if (urb->status != -ESHUTDOWN) {
+       if (status != -ESHUTDOWN) {
                urb->dev = serial->dev;
                err = usb_submit_urb(urb, GFP_ATOMIC);
                if (err)