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    Subject[ 42/62] usb: gadget: udc-core: stop UDC on device-initiated disconnect
    3.3-stable review patch.  If anyone has any objections, please let me know.

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

    From: Felipe Balbi <balbi@ti.com>

    commit 6d258a4c42089229b855fd706622029decf316d6 upstream.

    When we want to do device-initiated disconnect,
    let's make sure we stop the UDC in order to
    e.g. allow lower power states to be achieved by
    turning off unnecessary clocks and/or stoping
    PHYs.

    When reconnecting, call ->udc_start() again to
    make sure UDC is reinitialized.

    Signed-off-by: Felipe Balbi <balbi@ti.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/usb/gadget/udc-core.c | 4 ++++
    1 file changed, 4 insertions(+)

    --- a/drivers/usb/gadget/udc-core.c
    +++ b/drivers/usb/gadget/udc-core.c
    @@ -359,8 +359,12 @@ static ssize_t usb_udc_softconn_store(st
    struct usb_udc *udc = container_of(dev, struct usb_udc, dev);

    if (sysfs_streq(buf, "connect")) {
    + if (udc_is_newstyle(udc))
    + usb_gadget_udc_start(udc->gadget, udc->driver);
    usb_gadget_connect(udc->gadget);
    } else if (sysfs_streq(buf, "disconnect")) {
    + if (udc_is_newstyle(udc))
    + usb_gadget_udc_stop(udc->gadget, udc->driver);
    usb_gadget_disconnect(udc->gadget);
    } else {
    dev_err(dev, "unsupported command '%s'\n", buf);



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