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Commit 4b8b4aeb authored by Jack Pham's avatar Jack Pham Committed by Mayank Rana
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usb: dwc3-msm: Do dwc3_msm_gadget_vbus_draw() in sleepable context 



The gadget mode notification to draw a specific current may
occur in context with interrupts disabled, however the charger
driver's implementation of power_supply_set_property() for
POWER_SUPPLY_CURRENT_MAX currently uses a mutex. Since
sleeping is disallowed in this case, instead schedule a
work function to do the call.

Change-Id: I810ad8c102124ce22de72d83b6df58c8fc991251
Signed-off-by: default avatarJack Pham <jackp@codeaurora.org>
Signed-off-by: default avatarMayank Rana <mrana@codeaurora.org>
parent 3e668f34

drivers/usb/dwc3/dwc3-msm.c

+12 −1
Original line number Diff line number Diff line
@@ -186,6 +186,7 @@ struct dwc3_msm { 
	u32			bus_perf_client;

	struct msm_bus_scale_pdata	*bus_scale_table;

	struct power_supply	*usb_psy;

	struct work_struct	vbus_draw_work;

	bool			in_host_mode;

	unsigned int		tx_fifo_size;

	bool			vbus_active;
@@ -1585,6 +1586,15 @@ static void dwc3_msm_qscratch_reg_init(struct dwc3_msm *mdwc) 


}



static void dwc3_msm_vbus_draw_work(struct work_struct *w)

{

	struct dwc3_msm *mdwc = container_of(w, struct dwc3_msm,

			vbus_draw_work);

	struct dwc3 *dwc = platform_get_drvdata(mdwc->dwc3);



	dwc3_msm_gadget_vbus_draw(mdwc, dwc->vbus_draw);

}



static void dwc3_msm_notify_event(struct dwc3 *dwc, unsigned int event)

{

	struct dwc3_msm *mdwc = dev_get_drvdata(dwc->dev->parent);
@@ -1670,7 +1680,7 @@ static void dwc3_msm_notify_event(struct dwc3 *dwc, unsigned int event) 
		break;

	case DWC3_CONTROLLER_SET_CURRENT_DRAW_EVENT:

		dev_dbg(mdwc->dev, "DWC3_CONTROLLER_SET_CURRENT_DRAW_EVENT received\n");

		dwc3_msm_gadget_vbus_draw(mdwc, dwc->vbus_draw);

		schedule_work(&mdwc->vbus_draw_work);

		break;

	case DWC3_CONTROLLER_RESTART_USB_SESSION:

		dev_dbg(mdwc->dev, "DWC3_CONTROLLER_RESTART_USB_SESSION received\n");
@@ -2568,6 +2578,7 @@ static int dwc3_msm_probe(struct platform_device *pdev) 
	INIT_WORK(&mdwc->resume_work, dwc3_resume_work);

	INIT_WORK(&mdwc->restart_usb_work, dwc3_restart_usb_work);

	INIT_WORK(&mdwc->bus_vote_w, dwc3_msm_bus_vote_w);

	INIT_WORK(&mdwc->vbus_draw_work, dwc3_msm_vbus_draw_work);

	INIT_DELAYED_WORK(&mdwc->sm_work, dwc3_otg_sm_work);



	mdwc->dwc3_wq = alloc_ordered_workqueue("dwc3_wq", 0);