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    Subject[PATCH 57/97] iwlwifi: fix 40MHz operation setting on cards that do not allow it
    Date
    From: Reinette Chatre <reinette.chatre@intel.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@intel.com>
    Signed-off-by: John W. Linville <linville@tuxdriver.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.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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