HID: remove BKL from hiddev_ioctl_usage()

The race between ioctl and disconnect is guarded by low level
hiddev device mutex (existancelock) since the commit
07903407 ("HID: hiddev cleanup -- handle all error conditions
properly"), therefore we can remove the lock_kernel() from
hiddev_ioctl_usage().

Acked-by: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 0 insertions, 5 deletions

diff --git a/drivers/hid/usbhid/hiddev.c b/drivers/hid/usbhid/hiddev.c
index 8b6ee247bfe4..867e08433e4b 100644
--- a/drivers/hid/usbhid/hiddev.c
+++ b/drivers/hid/usbhid/hiddev.c
@@ -450,7 +450,6 @@ static noinline int hiddev_ioctl_usage(struct hiddev *hiddev, unsigned int cmd,
         uref_multi = kmalloc(sizeof(struct hiddev_usage_ref_multi), GFP_KERNEL);
         if (!uref_multi)
                 return -ENOMEM;
-        lock_kernel();
         uref = &uref_multi->uref;
         if (cmd == HIDIOCGUSAGES || cmd == HIDIOCSUSAGES) {
                 if (copy_from_user(uref_multi, user_arg,
@@ -528,7 +527,6 @@ static noinline int hiddev_ioctl_usage(struct hiddev *hiddev, unsigned int cmd,
 
                 case HIDIOCGCOLLECTIONINDEX:
                         i = field->usage[uref->usage_index].collection_index;
-                        unlock_kernel();
                         kfree(uref_multi);
                         return i;
                 case HIDIOCGUSAGES:
@@ -547,15 +545,12 @@ static noinline int hiddev_ioctl_usage(struct hiddev *hiddev, unsigned int cmd,
                 }
 
 goodreturn:
-                unlock_kernel();
                 kfree(uref_multi);
                 return 0;
 fault:
-                unlock_kernel();
                 kfree(uref_multi);
                 return -EFAULT;
 inval:
-                unlock_kernel();
                 kfree(uref_multi);
                 return -EINVAL;
         }