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: Andi Kleen <ak@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
From: Andi Kleen <ak@linux.intel.com>

1 files changed, 2 insertions, 5 deletions

diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index c2f62a3993d2..f1aaff6202a5 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -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;
                 }