From 8ae8090c82eb407267001f75b3d256b3bd4ae691 Mon Sep 17 00:00:00 2001 From: Kishon Vijay Abraham I Date: Wed, 21 Mar 2012 21:34:30 +0530 Subject: [PATCH] usb: gadget: udc-core: fix asymmetric calls in remove_driver During modprobe of gadget driver, pullup is called after udc_start. In order to make the exit path symmetric when removing a gadget driver, call pullup before ->udc_stop. This is needed to avoid issues with PM where udc_stop disables the module completely (put IP in reset state, cut functional and interface clocks, and so on), which prevents us from accessing the IP's address space, thus creating the possibility of an abort exception when we try to access IP's address space after clocks are off. Cc: stable@vger.kernel.org Signed-off-by: Partha Basak Signed-off-by: Kishon Vijay Abraham I Signed-off-by: Felipe Balbi --- drivers/usb/gadget/udc-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/gadget/udc-core.c b/drivers/usb/gadget/udc-core.c index c261887e05ae..2fa9865babed 100644 --- a/drivers/usb/gadget/udc-core.c +++ b/drivers/usb/gadget/udc-core.c @@ -264,8 +264,8 @@ static void usb_gadget_remove_driver(struct usb_udc *udc) if (udc_is_newstyle(udc)) { udc->driver->disconnect(udc->gadget); udc->driver->unbind(udc->gadget); - usb_gadget_udc_stop(udc->gadget, udc->driver); usb_gadget_disconnect(udc->gadget); + usb_gadget_udc_stop(udc->gadget, udc->driver); } else { usb_gadget_stop(udc->gadget, udc->driver); } -- 2.20.1