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tty: drop the BKL for driver/ldisc ioctl methods 

Now we have pushed the lock down we can stop wrapping the call with a lock in
the tty layer.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alan Cox 2008-04-30 00:53:34 -07:00 committed by Linus Torvalds
parent 1c2630ccf9
commit d17468c73e
1 changed files with 1 additions and 8 deletions
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9
drivers/char/tty_io.c
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@ -3459,11 +3459,8 @@ long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
switch (cmd) {
case TIOCSBRK:
case TIOCCBRK:
if (tty->driver->ioctl) {
lock_kernel();
if (tty->driver->ioctl)
retval = tty->driver->ioctl(tty, file, cmd, arg);
unlock_kernel();
}
return retval;
/* These two ioctl's always return success; even if */
@ -3584,18 +3581,14 @@ long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
break;
}
if (tty->driver->ioctl) {
lock_kernel();
retval = (tty->driver->ioctl)(tty, file, cmd, arg);
unlock_kernel();
if (retval != -ENOIOCTLCMD)
return retval;
}
ld = tty_ldisc_ref_wait(tty);
retval = -EINVAL;
if (ld->ioctl) {
lock_kernel();
retval = ld->ioctl(tty, file, cmd, arg);
unlock_kernel();
if (retval == -ENOIOCTLCMD)
retval = -EINVAL;
}