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Commit 644f6a12 authored by Thomas Pugliese's avatar Thomas Pugliese Committed by Greg Kroah-Hartman
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HWA: avoid constant suspend and resume on the root hub 



Prevent the USB core from suspending the HWA root hub since bus_suspend
and bus_resume are not yet supported.  Otherwise the PM system will chew
up CPU time constantly attempting to suspend and resume the root hub but
never succeeding.

Signed-off-by: default avatarThomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent c654ecbb

drivers/usb/host/hwa-hc.c

+7 −0
Original line number Diff line number Diff line
@@ -161,6 +161,13 @@ static int hwahc_op_start(struct usb_hcd *usb_hcd) 
	usb_hcd->uses_new_polling = 1;

	set_bit(HCD_FLAG_POLL_RH, &usb_hcd->flags);

	usb_hcd->state = HC_STATE_RUNNING;



	/*

	 * prevent USB core from suspending the root hub since

	 * bus_suspend and bus_resume are not yet supported.

	 */

	pm_runtime_get_noresume(&usb_hcd->self.root_hub->dev);



	result = 0;

out:

	mutex_unlock(&wusbhc->mutex);