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authorAlan Cox <alan@lxorguk.ukuu.org.uk>2008-04-30 00:53:34 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-30 08:29:41 -0700
commitd17468c73e138e1108b279acf892dd35937d43ed (patch)
treea572b8d50de0146c60f15425de03e8af92832dd5 /drivers/char/tty_io.c
parent1c2630ccf922b7ea2c54c184243d4fb2bd2cf3c6 (diff)
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>
Diffstat (limited to 'drivers/char/tty_io.c')
-rw-r--r--drivers/char/tty_io.c9
1 files changed, 1 insertions, 8 deletions
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 2460c4c7616..35c7d2eb8b2 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -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;
}