staging: unisys: simplify visornic_serverdown_complete

Theres a lot of code duplication going on in visornic_serverdown_complete.
We should just be able to send it through the dev_close path and have it
do the right things.

Signed-off-by: Neil Horman <nhorman@redhat.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/unisys/visornic/visornic_main.c b/drivers/staging/unisys/visornic/visornic_main.c
index 6c60e18..aeb379e 100644 (file)
--- a/drivers/staging/unisys/visornic/visornic_main.c
+++ b/drivers/staging/unisys/visornic/visornic_main.c
@@ -19,10 +19,11 @@
  */
 
 #include <linux/debugfs.h>
-#include <linux/netdevice.h>
 #include <linux/etherdevice.h>
-#include <linux/skbuff.h>
+#include <linux/netdevice.h>
 #include <linux/kthread.h>
+#include <linux/skbuff.h>
+#include <linux/rtnetlink.h>
 
 #include "visorbus.h"
 #include "iochannel.h"
@@ -370,8 +371,6 @@ visornic_serverdown_complete(struct work_struct *work)
 {
        struct visornic_devdata *devdata;
        struct net_device *netdev;
-       unsigned long flags;
-       int i = 0, count = 0;
 
        devdata = container_of(work, struct visornic_devdata,
                               serverdown_completion);
@@ -380,27 +379,11 @@ visornic_serverdown_complete(struct work_struct *work)
        /* Stop using datachan */
        visor_thread_stop(&devdata->threadinfo);
 
-       /* Inform Linux that the link is down */
-       netif_carrier_off(netdev);
-       netif_stop_queue(netdev);
+       rtnl_lock();
+       dev_close(netdev);
+       rtnl_unlock();
 
-       /* Free the skb for XMITs that haven't been serviced by the server
-        * We shouldn't have to inform Linux about these IOs because they
-        * are "lost in the ethernet"
-        */
-       skb_queue_purge(&devdata->xmitbufhead);
-
-       spin_lock_irqsave(&devdata->priv_lock, flags);
-       /* free rcv buffers */
-       for (i = 0; i < devdata->num_rcv_bufs; i++) {
-               if (devdata->rcvbuf[i]) {
-                       kfree_skb(devdata->rcvbuf[i]);
-                       devdata->rcvbuf[i] = NULL;
-                       count++;
-               }
-       }
        atomic_set(&devdata->num_rcvbuf_in_iovm, 0);
-       spin_unlock_irqrestore(&devdata->priv_lock, flags);
 
        if (devdata->server_down_complete_func)
                (*devdata->server_down_complete_func)(devdata->dev, 0);
@@ -605,6 +588,8 @@ visornic_disable_with_timeout(struct net_device *netdev, const int timeout)
        /* we've set enabled to 0, so we can give up the lock. */
        spin_unlock_irqrestore(&devdata->priv_lock, flags);
 
+       skb_queue_purge(&devdata->xmitbufhead);
+
        /* Free rcv buffers - other end has automatically unposed them on
         * disable
         */
@@ -1174,7 +1159,6 @@ repost_return(struct uiscmdrsp *cmdrsp, struct visornic_devdata *devdata,
                        devdata->bad_rcv_buf++;
                }
        }
-       atomic_dec(&devdata->usage);
        return status;
 }
 
@@ -1228,10 +1212,6 @@ visornic_rx(struct uiscmdrsp *cmdrsp)
        devdata->net_stats.rx_packets++;
        devdata->net_stats.rx_bytes = skb->len;
 
-       atomic_inc(&devdata->usage);    /* don't want a close to happen before
-                                        *  we're done here
-                                        */
-
        /* set length to how much was ACTUALLY received -
         * NOTE: rcv_done_len includes actual length of data rcvd
         * including ethhdr