[PATCH wireless-2.6] iwlwifi: quiet a noisy printk

[PATCH wireless-2.6] iwlwifi: quiet a noisy printk

[Wey-Yi Guy]

From: Don Fry <donald.h.fry@intel.com>

Timing issues in microcode for some devices can cause a compressed BA to
be sent to the driver prior to returning any a-MPDU notification.
Traces show RTS-CTS is exchanged and then the timer fires which causes an
empty BA to be sent which acknowledges nothing.  This results in a noisy
printk. Only print the message if the bitmap is non-zero.

Signed-off-by:  Don Fry <donald.h.fry@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
---
this patch is also available from wireless-2.6 branch on
 git://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi-2.6.git

 drivers/net/wireless/iwlwifi/iwl-agn-tx.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-tx.c b/drivers/net/wireless/iwlwifi/iwl-agn-tx.c
index 69155aa..369b210 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-tx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-tx.c
@@ -1203,7 +1203,8 @@ static int iwlagn_tx_status_reply_compressed_ba(struct iwl_priv *priv,
 	struct ieee80211_tx_info *info;
 
 	if (unlikely(!agg->wait_for_ba))  {
-		IWL_ERR(priv, "Received BA when not expected\n");
+		if (unlikely(ba_resp->bitmap))
+			IWL_ERR(priv, "Received BA when not expected\n");
 		return -EINVAL;
 	}
 
-- 
1.7.0.4