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Message-Id: <20110928220141.531091944@clark.kroah.org>
Date: Wed, 28 Sep 2011 15:01:58 -0700
From: Greg KH <gregkh@...e.de>
To: linux-kernel@...r.kernel.org, stable@...nel.org
Cc: stable-review@...nel.org, torvalds@...ux-foundation.org,
akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
Don Fry <donald.h.fry@...el.com>,
Wey-Yi Guy <wey-yi.w.guy@...el.com>,
"John W. Linville" <linville@...driver.com>
Subject: [154/244] iwlagn: workaround bug crashing some APs
3.0-stable review patch. If anyone has any objections, please let us know.
------------------
From: Don Fry <donald.h.fry@...el.com>
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@...el.com>
SIgned-off-by: Wey-Yi Guy <wey-yi.w.guy@...el.com>
Signed-off-by: John W. Linville <linville@...driver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
drivers/net/wireless/iwlwifi/iwl-agn.c | 5 +++++
1 file changed, 5 insertions(+)
--- 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
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;
--
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