[PATCH] [2.6.22] Fix a potential NULL pointer dereference in free_shared_mem() in drivers/net/s2io.c

["Micah Gruber" <micah.gruber@gmail.com>]

This patch fixes a potential null dereference bug where we dereference
nic before a null check. This patch simply moves the dereferencing
after the null check.

Signed-off-by: Micah Gruber < micah.gruber@gmail.com>

--- a/drivers/net/s2io.c
+++ b/drivers/net/s2io.c
@@ -789,12 +789,14 @@
       struct mac_info *mac_control;
       struct config_param *config;
       int lst_size, lst_per_page;
-       struct net_device *dev = nic->dev;
+       struct net_device *dev;
       int page_num = 0;

       if (!nic)
               return;

+       dev = nic->dev;
+
       mac_control = &nic->mac_control;
       config = &nic->config;
-
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