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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: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thomas Pugliese 2013-08-08 15:25:47 -05:00 committed by Greg Kroah-Hartman
parent c654ecbbfe
commit 644f6a121a
1 changed files with 7 additions and 0 deletions
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7
drivers/usb/host/hwa-hc.c
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@ -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);