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    Subject[patch 37/49] iwl3945: do not send scan command if channel count zero
    2.6.27-stable review patch.  If anyone has any objections, please let us know.

    ------------------

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

    commit 14b5433606289dbc5b6fd70ced11462f80e95003 upstream.

    Do not send scan command if no channels to scan.

    This avoids a Microcode error as reported in:
    http://www.intellinuxwireless.org/bugzilla/show_bug.cgi?id=1650
    http://bugzilla.kernel.org/show_bug.cgi?id=11806
    http://marc.info/?l=linux-wireless&m=122437145211886&w=2

    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/iwl3945-base.c | 5 +++++
    1 file changed, 5 insertions(+)

    --- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
    +++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c
    @@ -6259,6 +6259,11 @@ static void iwl3945_bg_request_scan(stru
    direct_mask,
    (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);

    + if (scan->channel_count == 0) {
    + IWL_DEBUG_SCAN("channel count %d\n", scan->channel_count);
    + goto done;
    + }
    +
    cmd.len += le16_to_cpu(scan->tx_cmd.len) +
    scan->channel_count * sizeof(struct iwl3945_scan_channel);
    cmd.data = scan;
    --


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