usbnet: fix usb_autopm_get_interface failure(v1) (b0786b43) · Commits · 戴 / test

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: Greg Kroah-Hartman <gregkh@suse.de> 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> Cc: stable@kernel.org Signed-off-by:

Ming Lei <tom.leiming@gmail.com> Signed-off-by:

David S. Miller <davem@davemloft.net>

drivers/net/usb/usbnet.c

+11 −0

Original line number	Diff line number	Diff line
		@@ -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;

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