usb: musb: gadget: clear gadget_driver when gadget is stopped

Some musb glue drivers use gadget_driver pointer to know if any gadget
drivers are loaded at some moment and base further decisions on it,
like to do runtime suspend/resume or not. Right now the pointer is
left alone on stop and OMAP musb glue later does wrong runtime_pm
decisions because of it.

Clear the gadget_driver pointer on remove, it's invalid after stop
anyway.

Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index e8408883ab0d3e5fc002c9d1a4367b0978fe0b88..ff6ba3adf5feb88535dd043bb49c3d49de56edf1 100644 (file)
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -1934,6 +1934,7 @@ static int musb_gadget_stop(struct usb_gadget *g,
        dev_dbg(musb->controller, "unregistering driver %s\n", driver->function);
 
        musb->is_active = 0;
+       musb->gadget_driver = NULL;
        musb_platform_try_idle(musb, 0);
        spin_unlock_irqrestore(&musb->lock, flags);