linux-kernel - [PATCH 57/97] iwlwifi: fix 40MHz operation setting on cards that do not allow it

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Message-Id: <1262651630-7354-57-git-send-email-gregkh@suse.de>
Date:	Mon,  4 Jan 2010 16:33:10 -0800
From:	Greg Kroah-Hartman <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org,
	stable-review@...nel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk,
	Reinette Chatre <reinette.chatre@...el.com>,
	"John W. Linville" <linville@...driver.com>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [PATCH 57/97] iwlwifi: fix 40MHz operation setting on cards that do not allow it

From: Reinette Chatre <reinette.chatre@...el.com>

commit 6c3069b1e7e983e176a5f826e2edffefdd404a08 upstream.

Some devices have 40MHz operation disabled entirely. Ensure that driver do
not enable 40MHz operation if a channel does not allow this.

This fixes http://bugzilla.intellinuxwireless.org/show_bug.cgi?id=2135

Signed-off-by: Reinette Chatre <reinette.chatre@...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-eeprom.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/net/wireless/iwlwifi/iwl-eeprom.c b/drivers/net/wireless/iwlwifi/iwl-eeprom.c
index 622b636..18dc3a4 100644
--- a/drivers/net/wireless/iwlwifi/iwl-eeprom.c
+++ b/drivers/net/wireless/iwlwifi/iwl-eeprom.c
@@ -711,7 +711,8 @@ static int iwl_mod_ht40_chan_info(struct iwl_priv *priv,
 	ch_info->ht40_min_power = 0;
 	ch_info->ht40_scan_power = eeprom_ch->max_power_avg;
 	ch_info->ht40_flags = eeprom_ch->flags;
-	ch_info->ht40_extension_channel &= ~clear_ht40_extension_channel;
+	if (eeprom_ch->flags & EEPROM_CHANNEL_VALID)
+		ch_info->ht40_extension_channel &= ~clear_ht40_extension_channel;
 
 	return 0;
 }
-- 
1.6.6

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