1 files changed, 41 insertions, 7 deletions

diff --git a/net/wireless/wext.c b/net/wireless/wext.c
index 0e59f9ae9b81..252c2010c2e2 100644
--- a/net/wireless/wext.c
+++ b/net/wireless/wext.c
@@ -636,8 +636,10 @@ static void wireless_seq_printf_stats(struct seq_file *seq,
 /*
  * Print info for /proc/net/wireless (print all entries)
  */
-static int wireless_seq_show(struct seq_file *seq, void *v)
+static int wireless_dev_seq_show(struct seq_file *seq, void *v)
 {
+        might_sleep();
+
         if (v == SEQ_START_TOKEN)
                 seq_printf(seq, "Inter-| sta-|   Quality        |   Discarded "
                                 "packets               | Missed | WE\n"
@@ -649,14 +651,46 @@ static int wireless_seq_show(struct seq_file *seq, void *v)
         return 0;
 }
 
+static void *wireless_dev_seq_start(struct seq_file *seq, loff_t *pos)
+{
+        struct net *net = seq_file_net(seq);
+        loff_t off;
+        struct net_device *dev;
+
+        rtnl_lock();
+        if (!*pos)
+                return SEQ_START_TOKEN;
+
+        off = 1;
+        for_each_netdev(net, dev)
+                if (off++ == *pos)
+                        return dev;
+        return NULL;
+}
+
+static void *wireless_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+        struct net *net = seq_file_net(seq);
+
+        ++*pos;
+
+        return v == SEQ_START_TOKEN ?
+                first_net_device(net) : next_net_device(v);
+}
+
+static void wireless_dev_seq_stop(struct seq_file *seq, void *v)
+{
+        rtnl_unlock();
+}
+
 static const struct seq_operations wireless_seq_ops = {
-        .start = dev_seq_start,
-        .next  = dev_seq_next,
-        .stop  = dev_seq_stop,
-        .show  = wireless_seq_show,
+        .start = wireless_dev_seq_start,
+        .next  = wireless_dev_seq_next,
+        .stop  = wireless_dev_seq_stop,
+        .show  = wireless_dev_seq_show,
 };
 
-static int wireless_seq_open(struct inode *inode, struct file *file)
+static int seq_open_wireless(struct inode *inode, struct file *file)
 {
         return seq_open_net(inode, file, &wireless_seq_ops,
                             sizeof(struct seq_net_private));
@@ -664,7 +698,7 @@ static int wireless_seq_open(struct inode *inode, struct file *file)
 
 static const struct file_operations wireless_seq_fops = {
         .owner   = THIS_MODULE,
-        .open    = wireless_seq_open,
+        .open    = seq_open_wireless,
         .read    = seq_read,
         .llseek  = seq_lseek,
         .release = seq_release_net,