USB: fix error handling in kl5kusb

- report errors
- cleanup in error case
- use of endianness macros

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/serial/kl5kusb105.c b/drivers/usb/serial/kl5kusb105.c
index b2097c45a2354c50ece612ca9df3ee1901ebf804..7b085f334cebe2de693b21a58a67a6f809d8f52a 100644 (file)
--- a/drivers/usb/serial/kl5kusb105.c
+++ b/drivers/usb/serial/kl5kusb105.c
@@ -238,7 +238,7 @@ static int klsi_105_get_line_state(struct usb_serial_port *port,
        if (rc < 0)
                err("Reading line status failed (error = %d)", rc);
        else {
-               status = status_buf[0] + (status_buf[1]<<8);
+               status = le16_to_cpu(*(u16 *)status_buf);
 
                info("%s - read status %x %x", __FUNCTION__,
                     status_buf[0], status_buf[1]);
@@ -257,7 +257,7 @@ static int klsi_105_get_line_state(struct usb_serial_port *port,
 static int klsi_105_startup (struct usb_serial *serial)
 {
        struct klsi_105_private *priv;
-       int i;
+       int i, j;
 
        /* check if we support the product id (see keyspan.c)
         * FIXME
@@ -265,12 +265,12 @@ static int klsi_105_startup (struct usb_serial *serial)
 
        /* allocate the private data structure */
        for (i=0; i<serial->num_ports; i++) {
-               int j;
                priv = kmalloc(sizeof(struct klsi_105_private),
                                                   GFP_KERNEL);
                if (!priv) {
                        dbg("%skmalloc for klsi_105_private failed.", __FUNCTION__);
-                       return -ENOMEM;
+                       i--;
+                       goto err_cleanup;
                }
                /* set initial values for control structures */
                priv->cfg.pktlen    = 5;
@@ -292,15 +292,14 @@ static int klsi_105_startup (struct usb_serial *serial)
                        priv->write_urb_pool[j] = urb;
                        if (urb == NULL) {
                                err("No more urbs???");
-                               continue;
+                               goto err_cleanup;
                        }
 
-                       urb->transfer_buffer = NULL;
                        urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE,
                                                        GFP_KERNEL);
                        if (!urb->transfer_buffer) {
                                err("%s - out of memory for urb buffers.", __FUNCTION__);
-                               continue;
+                               goto err_cleanup;
                        }
                }
 
@@ -308,7 +307,20 @@ static int klsi_105_startup (struct usb_serial *serial)
                init_waitqueue_head(&serial->port[i]->write_wait);
        }
        
-       return (0);
+       return 0;
+
+err_cleanup:
+       for (; i >= 0; i--) {
+               priv = usb_get_serial_port_data(serial->port[i]);
+               for (j=0; j < NUM_URBS; j++) {
+                       if (priv->write_urb_pool[j]) {
+                               kfree(priv->write_urb_pool[j]->transfer_buffer);
+                               usb_free_urb(priv->write_urb_pool[j]);
+                       }
+               }
+               usb_set_serial_port_data(serial->port[i], NULL);
+       }
+       return -ENOMEM;
 } /* klsi_105_startup */