Commit bdd405d2 authored Aug 04, 2014 by Roger Quadros Committed by Greg Kroah-Hartman Aug 26, 2014

usb: hub: Prevent hub autosuspend if usbcore.autosuspend is -1



If user specifies that USB autosuspend must be disabled by module
parameter "usbcore.autosuspend=-1" then we must prevent
autosuspend of USB hub devices as well.

commit 596d789a introduced in v3.8 changed the original behaivour
and stopped respecting the usbcore.autosuspend parameter for hubs.

Fixes: 596d789a "USB: set hub's default autosuspend delay as 0"

Cc: [3.8+] <stable@vger.kernel.org>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Tested-by: Michael Welling <mwelling@emacinc.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 5b6b80ae

drivers/usb/core/hub.c

+5 −1

Original line number	Original line	Diff line number	Diff line
	@@ -1728,7 +1728,11 @@ static int hub_probe(struct usb_interface intf, const struct usb_device_id id)
	* - Change autosuspend delay of hub can avoid unnecessary auto		* - Change autosuspend delay of hub can avoid unnecessary auto
	* suspend timer for hub, also may decrease power consumption		* suspend timer for hub, also may decrease power consumption
	* of USB bus.		* of USB bus.
			*
			* - If user has indicated to prevent autosuspend by passing
			* usbcore.autosuspend = -1 then keep autosuspend disabled.
	*/		*/
			if (hdev->dev.power.autosuspend_delay >= 0)
	pm_runtime_set_autosuspend_delay(&hdev->dev, 0);		pm_runtime_set_autosuspend_delay(&hdev->dev, 0);

	/*		/*

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