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Commit dd914d68 authored by Hemant Kumar's avatar Hemant Kumar
Browse files

usb: core: Replace msleep with usleep_range 



Since usleep_range provides better accuracy in
comparison to msleep. This helps in reducing
the latency of host bus resume.

Change-Id: Ie8d5231327fcc27ab2a28542e0d96687abb9aace
Signed-off-by: default avatarHemant Kumar <hemantk@codeaurora.org>
parent 9b602856

drivers/usb/core/hub.c

+3 −2
Original line number Diff line number Diff line
@@ -3481,7 +3481,8 @@ int usb_port_resume(struct usb_device *udev, pm_message_t msg) 
		/* drive resume for USB_RESUME_TIMEOUT msec */

		dev_dbg(&udev->dev, "usb %sresume\n",

				(PMSG_IS_AUTO(msg) ? "auto-" : ""));

		msleep(USB_RESUME_TIMEOUT);

		usleep_range(USB_RESUME_TIMEOUT * 1000,

				(USB_RESUME_TIMEOUT + 1) * 1000);



		/* Virtual root hubs can trigger on GET_PORT_STATUS to

		 * stop resume signaling.  Then finish the resume
@@ -3490,7 +3491,7 @@ int usb_port_resume(struct usb_device *udev, pm_message_t msg) 
		status = hub_port_status(hub, port1, &portstatus, &portchange);



		/* TRSMRCY = 10 msec */

		msleep(10);

		usleep_range(10000, 10500);

	}



 SuspendCleared: