From: Ming Lei <tom.leiming@gmail.com> Date: Mon, 1 Nov 2010 14:11:54 +0000 (-0700) Subject: usbnet: fix usb_autopm_get_interface failure(v1) X-Git-Tag: firefly_0821_release~9833^2~79^2^2~149 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6d1c2b8868a43374df1ba97ff1a85572c3f0145d;p=firefly-linux-kernel-4.4.55.git usbnet: fix usb_autopm_get_interface failure(v1) commit b0786b430c982dffbb44d8030e6b6088671ce745 upstream. 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 <dbrownell@users.sourceforge.net> Cc: "David S. Miller" <davem@davemloft.net> Cc: Ben Hutchings <ben@decadent.org.uk> Cc: Joe Perches <joe@perches.com> Cc: Oliver Neukum <oliver@neukum.org> Cc: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Ming Lei <tom.leiming@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> --- diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c index ca7fc9df1ccf..c04d49e31f81 100644 --- a/drivers/net/usb/usbnet.c +++ b/drivers/net/usb/usbnet.c @@ -45,6 +45,7 @@ #include <linux/usb/usbnet.h> #include <linux/slab.h> #include <linux/kernel.h> +#include <linux/pm_runtime.h> #define DRIVER_VERSION "22-Aug-2005" @@ -1273,6 +1274,16 @@ 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;