Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit aee63e3c authored by Paul Zimmerman's avatar Paul Zimmerman Committed by Felipe Balbi
Browse files

usb: dwc3: shorten long delay in dwc3_gadget_set_link_state() 



The loop in dwc3_gadget_set_link_state() was using a udelay(500),
which is a long time to delay in interrupt context. Change it to
udelay(5) and increase the loop count to match.

Signed-off-by: default avatarPaul Zimmerman <paulz@synopsys.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 7d26b587

drivers/usb/dwc3/gadget.c

+3 −4
Original line number Diff line number Diff line
@@ -95,11 +95,11 @@ int dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode) 
 * @state: the state to put link into

 *

 * Caller should take care of locking. This function will

 * return 0 on success or -EINVAL.

 * return 0 on success or -ETIMEDOUT.

 */

int dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state)

{

	int		retries = 100;

	int		retries = 10000;

	u32		reg;



	reg = dwc3_readl(dwc->regs, DWC3_DCTL);
@@ -113,11 +113,10 @@ int dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state) 
	while (--retries) {

		reg = dwc3_readl(dwc->regs, DWC3_DSTS);



		/* in HS, means ON */

		if (DWC3_DSTS_USBLNKST(reg) == state)

			return 0;



		udelay(500);

		udelay(5);

	}



	dev_vdbg(dwc->dev, "link state change request timed out\n");