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    Subject[PATCH 3.18 05/16] usb: musb: fix tx fifo flush handling again
    Date
    3.18-stable review patch.  If anyone has any objections, please let me know.

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

    From: Bin Liu <b-liu@ti.com>

    commit 45d73860530a14c608f410b91c6c341777bfa85d upstream.

    commit 68fe05e2a451 ("usb: musb: fix tx fifo flush handling") drops the
    1ms delay trying to solve the long disconnect time issue when
    application queued many tx urbs. However, the 1ms delay is needed for
    some use cases, for example, without the delay, reconnecting AR9271 WIFI
    dongle no longer works if the connection is dropped from the AP.

    So let's add back the 1ms delay in musb_h_tx_flush_fifo(), and solve the
    long disconnect time problem with a separate patch for
    usb_hcd_flush_endpoint().

    Signed-off-by: Bin Liu <b-liu@ti.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/usb/musb/musb_host.c | 1 +
    1 file changed, 1 insertion(+)

    --- a/drivers/usb/musb/musb_host.c
    +++ b/drivers/usb/musb/musb_host.c
    @@ -1294,6 +1294,7 @@ void musb_host_tx(struct musb *musb, u8
    | MUSB_TXCSR_TXPKTRDY);
    }
    return;
    + mdelay(1);
    }

    done:

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