[PATCH] p54: add null pointer check before releasing socket buffer

[Myungho Jung]

Kernel panic is caused by trying to dereference null pointer. Check if
the pointer is null before freeing space.

Signed-off-by: Myungho Jung <mhju...@gmail.com>
---
 drivers/net/wireless/intersil/p54/txrx.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/intersil/p54/txrx.c 
b/drivers/net/wireless/intersil/p54/txrx.c
index 1af7da0..8956061 100644
--- a/drivers/net/wireless/intersil/p54/txrx.c
+++ b/drivers/net/wireless/intersil/p54/txrx.c
@@ -503,7 +503,9 @@ static void p54_rx_eeprom_readback(struct p54_common *priv,
 
        priv->eeprom = NULL;
        tmp = p54_find_and_unlink_skb(priv, hdr->req_id);
-       dev_kfree_skb_any(tmp);
+       if (unlikely(!tmp))
+               dev_kfree_skb_any(tmp);
+
        complete(&priv->eeprom_comp);
 }
 
@@ -597,7 +599,9 @@ static void p54_rx_stats(struct p54_common *priv, struct 
sk_buff *skb)
        }
 
        tmp = p54_find_and_unlink_skb(priv, hdr->req_id);
-       dev_kfree_skb_any(tmp);
+       if (unlikely(!tmp))
+               dev_kfree_skb_any(tmp);
+
        complete(&priv->stat_comp);
 }
 
-- 
2.7.4