diff options
| author | Thomas Pugliese <thomas.pugliese@gmail.com> | 2013-08-09 00:25:47 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-13 02:41:09 +0400 |
| commit | 644f6a121af0aee94b243d33cfe38d6d474e8cbc (patch) | |
| tree | e21ddf727c1a887f8b561c032787e01d5ec7acbb /drivers/usb/host/hwa-hc.c | |
| parent | c654ecbbfefbeec8fbf202e117364bff48ecaea3 (diff) | |
| download | linux-644f6a121af0aee94b243d33cfe38d6d474e8cbc.tar.xz | |
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>
Diffstat (limited to 'drivers/usb/host/hwa-hc.c')
| -rw-r--r-- | drivers/usb/host/hwa-hc.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/usb/host/hwa-hc.c b/drivers/usb/host/hwa-hc.c index 483990c716aa..5b86ffb88f1c 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); |