From mboxrd@z Thu Jan 1 00:00:00 1970 From: tom.leiming@gmail.com Subject: [PATCH] usbnet: runtime pm: fix usb_autopm_get_interface failure Date: Wed, 27 Oct 2010 22:45:03 +0800 Message-ID: <1288190703-3154-1-git-send-email-tom.leiming@gmail.com> Cc: Ming Lei , David Brownell , Greg Kroah-Hartman , Ben Hutchings , Joe Perches , Andy Shevchenko , stable@kernel.org To: netdev@vger.kernel.org, oliver@neukum.org, davem@davemloft.net Return-path: Received: from mail-qw0-f46.google.com ([209.85.216.46]:36958 "EHLO mail-qw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755893Ab0J0OpQ (ORCPT ); Wed, 27 Oct 2010 10:45:16 -0400 Received: by qwf7 with SMTP id 7so44923qwf.19 for ; Wed, 27 Oct 2010 07:45:15 -0700 (PDT) Sender: netdev-owner@vger.kernel.org List-ID: From: Ming Lei Since usbnet already took usb runtime pm, we have to enable runtime pm for usb interface of usbnet, otherwise usb_autopm_get_interface may return failure and cause 'ifconfig usb0 up' failed if USB_SUSPEND(RUNTIME_PM) is enabled. Cc: David Brownell Cc: Greg Kroah-Hartman Cc: "David S. Miller" Cc: Ben Hutchings Cc: Joe Perches Cc: Oliver Neukum Cc: Andy Shevchenko Cc: stable@kernel.org Signed-off-by: Ming Lei --- drivers/net/usb/usbnet.c | 10 ++++++++++ 1 files changed, 10 insertions(+), 0 deletions(-) diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c index ca7fc9d..765308f 100644 --- a/drivers/net/usb/usbnet.c +++ b/drivers/net/usb/usbnet.c @@ -1273,6 +1273,16 @@ usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod) struct usb_device *xdev; int status; const char *name; + struct usb_driver *driver = to_usb_driver(udev->dev.driver); + + /*usbnet already took usb runtime pm, so have to enable the feature + * for usb interface, otherwise usb_autopm_get_interface may return + * failure if USB_SUSPEND(RUNTIME_PM) is enabled. + * */ + if (!driver->supports_autosuspend) { + driver->supports_autosuspend = 1; + pm_runtime_enable(&udev->dev); + } name = udev->dev.driver->name; info = (struct driver_info *) prod->driver_info; -- 1.7.3