From: Gregory Herrero Date: Tue, 29 Sep 2015 10:08:28 +0000 (+0200) Subject: usb: dwc2: gadget: exit hibernation before power down X-Git-Tag: firefly_0821_release~176^2~804^2~12^2~30 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=61f7223bf14689382fdf36b7580f206745c2409a;p=firefly-linux-kernel-4.4.55.git usb: dwc2: gadget: exit hibernation before power down When disconnecting cable, controller will detect a suspend condition and enter partial power down. If vbus_session is called by the phy driver during hibernation, make sure controller exit hibernation before it is accessed. Signed-off-by: Jianqiang Tang Signed-off-by: Gregory Herrero Signed-off-by: Mian Yousaf Kaukab Tested-by: Robert Baldyga Tested-by: Dinh Nguyen Tested-by: John Youn Acked-by: John Youn Signed-off-by: Felipe Balbi --- diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index e87a7359e632..ef964814b928 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -3285,14 +3285,15 @@ static int dwc2_hsotg_vbus_session(struct usb_gadget *gadget, int is_active) dev_dbg(hsotg->dev, "%s: is_active: %d\n", __func__, is_active); spin_lock_irqsave(&hsotg->lock, flags); + /* + * If controller is hibernated, it must exit from hibernation + * before being initialized / de-initialized + */ + if (hsotg->lx_state == DWC2_L2) + dwc2_exit_hibernation(hsotg, false); + if (is_active) { hsotg->op_state = OTG_STATE_B_PERIPHERAL; - /* - * If controller is hibernated, it must exit from hibernation - * before being initialized - */ - if (hsotg->lx_state == DWC2_L2) - dwc2_exit_hibernation(hsotg, false); dwc2_hsotg_core_init_disconnected(hsotg, false); if (hsotg->enabled)