iwlagn: workaround bug crashing some APs

commit 2249b011432ca3dcce112f0f71e0f531b4bb9347 upstream.

This patch reverts commit 9b7688328422b88a7a15dc0dc123ad9ab1a6e22d which
was introduced in 2.6.38-rc1.  It works around a problem where the iwlagn
driver stimulates a bug crashing (requiring power cycle to recover) some
APs under heavy traffic.

Signed-off-by: Don Fry <donald.h.fry@intel.com>
SIgned-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index 8e1942ebd9a..f24165d2698 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -2440,7 +2440,12 @@ static int iwl_mac_setup_register(struct iwl_priv *priv,
                     IEEE80211_HW_SPECTRUM_MGMT |
                     IEEE80211_HW_REPORTS_TX_ACK_STATUS;
 
+        /*
+         * Including the following line will crash some AP's.  This
+         * workaround removes the stimulus which causes the crash until
+         * the AP software can be fixed.
         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
+         */
 
         hw->flags |= IEEE80211_HW_SUPPORTS_PS |
                      IEEE80211_HW_SUPPORTS_DYNAMIC_PS;