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Walkaround kernel BUG_ON panic caused by unexpected duplicate packets.
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
---
ipw2200-1.0.6-chuyee/ipw2200.c | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)
diff -puN ipw2200.c~dup-without-retry ipw2200.c
--- ipw2200-1.0.6/ipw2200.c~dup-without-retry 2005-08-03 13:59:11.000000000 +0800
+++ ipw2200-1.0.6-chuyee/ipw2200.c 2005-08-03 14:51:52.000000000 +0800
@@ -7698,7 +7698,6 @@ static inline int is_network_packet(stru
static inline int is_duplicate_packet(struct ipw_priv *priv,
struct ieee80211_hdr *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);
@@ -7759,7 +7758,10 @@ static inline int is_duplicate_packet(st
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;
}
_
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