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Commit c532b29a authored by Andi Kleen's avatar Andi Kleen Committed by Greg Kroah-Hartman
Browse files

USB-BKL: Convert usb_driver ioctl to unlocked_ioctl 



And audit all the users. None needed the BKL.  That was easy
because there was only very few around.

Tested with allmodconfig build on x86-64

Signed-off-by: default avatarAndi Kleen <ak@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
From: Andi Kleen <ak@linux.intel.com>
parent 6e12ea46

drivers/usb/core/devio.c

+2 −5
Original line number Diff line number Diff line
@@ -1668,13 +1668,10 @@ static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl) 
	default:

		if (intf->dev.driver)

			driver = to_usb_driver(intf->dev.driver);

		if (driver == NULL || driver->ioctl == NULL) {

		if (driver == NULL || driver->unlocked_ioctl == NULL) {

			retval = -ENOTTY;

		} else {

			/* keep API that guarantees BKL */

			lock_kernel();

			retval = driver->ioctl(intf, ctl->ioctl_code, buf);

			unlock_kernel();

			retval = driver->unlocked_ioctl(intf, ctl->ioctl_code, buf);

			if (retval == -ENOIOCTLCMD)

				retval = -ENOTTY;

		}

drivers/usb/core/hub.c

+2 −1
Original line number Diff line number Diff line
@@ -1294,6 +1294,7 @@ descriptor_error: 
	return -ENODEV;

}



/* No BKL needed */

static int

hub_ioctl(struct usb_interface *intf, unsigned int code, void *user_data)

{
@@ -3465,7 +3466,7 @@ static struct usb_driver hub_driver = { 
	.reset_resume =	hub_reset_resume,

	.pre_reset =	hub_pre_reset,

	.post_reset =	hub_post_reset,

	.ioctl =	hub_ioctl,

	.unlocked_ioctl = hub_ioctl,

	.id_table =	hub_id_table,

	.supports_autosuspend =	1,

};

drivers/usb/misc/usbtest.c

+2 −1
Original line number Diff line number Diff line
@@ -1548,6 +1548,7 @@ fail: 
 * off just killing the userspace task and waiting for it to exit.

 */



/* No BKL needed */

static int

usbtest_ioctl (struct usb_interface *intf, unsigned int code, void *buf)

{
@@ -2170,7 +2171,7 @@ static struct usb_driver usbtest_driver = { 
	.name =		"usbtest",

	.id_table =	id_table,

	.probe =	usbtest_probe,

	.ioctl =	usbtest_ioctl,

	.unlocked_ioctl = usbtest_ioctl,

	.disconnect =	usbtest_disconnect,

	.suspend =	usbtest_suspend,

	.resume =	usbtest_resume,

include/linux/usb.h

+1 −1
Original line number Diff line number Diff line
@@ -843,7 +843,7 @@ struct usb_driver { 


	void (*disconnect) (struct usb_interface *intf);



	int (*ioctl) (struct usb_interface *intf, unsigned int code,

	int (*unlocked_ioctl) (struct usb_interface *intf, unsigned int code,

			void *buf);



	int (*suspend) (struct usb_interface *intf, pm_message_t message);