usb: gadget: pxa27x: fix suspend callback

commit 391e6dcb37857d5659b53def2f41e2f56850d33c upstream.

pxa27x disconnects pullups on suspend but doesn't
notify the gadget driver about it, so gadget driver
can't disable the endpoints it was using.

This causes problems on resume because gadget core
will think endpoints are still enabled and just
ignore the following usb_ep_enable().

Fix this problem by calling
gadget_driver->disconnect().

Tested-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/gadget/udc/pxa27x_udc.c b/drivers/usb/gadget/udc/pxa27x_udc.c
index b51226abade625d2ac0f34de68a72842d9c6742b..7a454708e948aa181eac339c149005e6c8dd8e9f 100644 (file)
--- a/drivers/usb/gadget/udc/pxa27x_udc.c
+++ b/drivers/usb/gadget/udc/pxa27x_udc.c
@@ -2535,6 +2535,9 @@ static int pxa_udc_suspend(struct platform_device *_dev, pm_message_t state)
        udc->pullup_resume = udc->pullup_on;
        dplus_pullup(udc, 0);
 
+       if (udc->driver)
+               udc->driver->disconnect(&udc->gadget);
+
        return 0;
 }