Workaround kernel BUG_ON panic caused by unexpected duplicate packets.

Signed-off-by: Zhu Yi <yi.zhu@intel.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/net/wireless/ipw2200.c b/drivers/net/wireless/ipw2200.c
index 6e79ae24ee1c..483993a4ca4b 100644
--- a/drivers/net/wireless/ipw2200.c
+++ b/drivers/net/wireless/ipw2200.c
@@ -7696,7 +7696,6 @@ static inline int is_network_packet(struct ipw_priv *priv,
 static inline int is_duplicate_packet(struct ipw_priv *priv,
                                       struct ieee80211_hdr_4addr *header)
 {
-        u16 fc = le16_to_cpu(header->frame_ctl);
         u16 sc = le16_to_cpu(header->seq_ctl);
         u16 seq = WLAN_GET_SEQ_SEQ(sc);
         u16 frag = WLAN_GET_SEQ_FRAG(sc);
@@ -7760,7 +7759,10 @@ static inline int is_duplicate_packet(struct ipw_priv *priv,
         return 0;
 
       drop:
-        BUG_ON(!(fc & IEEE80211_FCTL_RETRY));
+        /* Comment this line now since we observed the card receives
+         * duplicate packets but the FCTL_RETRY bit is not set in the
+         * IBSS mode with fragmentation enabled.
+         BUG_ON(!(le16_to_cpu(header->frame_ctl) & IEEE80211_FCTL_RETRY)); */
         return 1;
 }