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    Subject[127/129] iwlegacy: 3945: fix hw passive scan on radar channels
    3.2-stable review patch.  If anyone has any objections, please let me know.

    ------------------
    Content-Length: 2218
    Lines: 53

    From: Stanislaw Gruszka <sgruszka@redhat.com>

    commit 68acc4afb040d98ddfd2cae0de09e2f4e1ee127f upstream.

    Patch fix firmware error on "iw dev wlan0 scan passive" for
    hardware scanning (with disable_hw_scan=0 module parameter).

    iwl3945 0000:03:00.0: Microcode SW error detected. Restarting 0x82000008.
    iwl3945 0000:03:00.0: Loaded firmware version: 15.32.2.9
    iwl3945 0000:03:00.0: Start IWL Error Log Dump:
    iwl3945 0000:03:00.0: Status: 0x0002A2E4, count: 1
    iwl3945 0000:03:00.0: Desc Time asrtPC blink2 ilink1 nmiPC Line
    iwl3945 0000:03:00.0: SYSASSERT (0x5) 0041263900 0x13756 0x0031C 0x00000 764
    iwl3945 0000:03:00.0: Error Reply type 0x000002FC cmd C_SCAN (0x80) seq 0x443E ser 0x00340000
    iwl3945 0000:03:00.0: Command C_SCAN failed: FW Error
    iwl3945 0000:03:00.0: Can't stop Rx DMA.

    We have disable ability to change passive scanning to active on
    particular channel when traffic is detected on that channel. Otherwise
    firmware will report error, when we try to do passive scan on radar
    channels.

    Reported-and-debugged-by: Pedro Francisco <pedrogfrancisco@gmail.com>
    Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
    Signed-off-by: John W. Linville <linville@tuxdriver.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

    ---
    drivers/net/wireless/iwlegacy/iwl3945-base.c | 9 ++++-----
    1 file changed, 4 insertions(+), 5 deletions(-)

    --- a/drivers/net/wireless/iwlegacy/iwl3945-base.c
    +++ b/drivers/net/wireless/iwlegacy/iwl3945-base.c
    @@ -2656,14 +2656,13 @@ int iwl3945_request_scan(struct iwl_priv
    IWL_WARN(priv, "Invalid scan band\n");
    return -EIO;
    }
    -
    /*
    - * If active scaning is requested but a certain channel
    - * is marked passive, we can do active scanning if we
    - * detect transmissions.
    + * If active scaning is requested but a certain channel is marked
    + * passive, we can do active scanning if we detect transmissions. For
    + * passive only scanning disable switching to active on any channel.
    */
    scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
    - IWL_GOOD_CRC_TH_DISABLED;
    + IWL_GOOD_CRC_TH_NEVER;

    len = iwl_legacy_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
    vif->addr, priv->scan_request->ie,



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