libertas: Fix up error handling in lbs_setuserscan()

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/libertas/debugfs.c

@@ -293,18 +293,23 @@ static ssize_t lbs_setuserscan(struct file *file,
 	struct lbs_ioctl_user_scan_cfg *scan_cfg;
 	union iwreq_data wrqu;
 	int dur;
-	unsigned long addr = get_zeroed_page(GFP_KERNEL);
-	char *buf = (char *)addr;
+	char *buf = (char *)get_zeroed_page(GFP_KERNEL);
 
-	scan_cfg = kzalloc(sizeof(struct lbs_ioctl_user_scan_cfg), GFP_KERNEL);
-	if (!scan_cfg)
+	if (!buf)
 		return -ENOMEM;
-
+		
 	buf_size = min(count, len - 1);
 	if (copy_from_user(buf, userbuf, buf_size)) {
 		res = -EFAULT;
-		goto out_unlock;
+		goto out_buf;
+	}
+
+	scan_cfg = kzalloc(sizeof(struct lbs_ioctl_user_scan_cfg), GFP_KERNEL);
+	if (!scan_cfg) {
+		res = -ENOMEM;
+		goto out_buf;
 	}
+	res = count;
 
 	scan_cfg->bsstype = LBS_SCAN_BSS_TYPE_ANY;
 
@@ -317,15 +322,19 @@ static ssize_t lbs_setuserscan(struct file *file,
 
 	lbs_scan_networks(priv, scan_cfg, 1);
 	wait_event_interruptible(priv->adapter->cmd_pending,
-				 !priv->adapter->nr_cmd_pending);
+				 priv->adapter->surpriseremoved || !priv->adapter->nr_cmd_pending);
+
+	if (priv->adapter->surpriseremoved)
+		goto out_scan_cfg;
 
 	memset(&wrqu, 0x00, sizeof(union iwreq_data));
 	wireless_send_event(priv->dev, SIOCGIWSCAN, &wrqu, NULL);
 
-out_unlock:
-	free_page(addr);
+ out_scan_cfg:
 	kfree(scan_cfg);
-	return count;
+ out_buf:
+	free_page((unsigned long)buf);
+	return res;
 }