Hello. On 08/08/2013 11:41 PM, Thomas Pugliese wrote:
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@xxxxxxxxx>
diff --git a/drivers/usb/host/hwa-hc.c b/drivers/usb/host/hwa-hc.c index 483990c..02650f7 100644 --- a/drivers/usb/host/hwa-hc.c +++ b/drivers/usb/host/hwa-hc.c @@ -161,6 +161,11 @@ 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. */
According to Documentation/CodingStyle, the preferred style of multi-line comments is this:
/* * bla * bla */
+ pm_runtime_get_noresume(&usb_hcd->self.root_hub->dev); + result = 0; out: mutex_unlock(&wusbhc->mutex);
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