[PATCH v2] HWA: avoid constant suspend and resume on the root hub

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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..5b86ffb 100644
--- a/drivers/usb/host/hwa-hc.c
+++ b/drivers/usb/host/hwa-hc.c
@@ -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);
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux Media]     [Linux Input]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [Old Linux USB Devel Archive]

  Powered by Linux