diff options
| author | Alan Cox <alan@lxorguk.ukuu.org.uk> | 2008-04-30 00:53:17 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 08:29:38 -0700 |
| commit | 37925e050379ef4db9f4ed251786b6d43da6ec71 (patch) | |
| tree | 774ec9963acd20249a876d6be265da46da0b95d9 /drivers/char/epca.c | |
| parent | 7b130c0efd7acbdc3cf9b2e7cc9a26e923feec93 (diff) | |
| download | linux-stable-37925e050379ef4db9f4ed251786b6d43da6ec71.tar.gz linux-stable-37925e050379ef4db9f4ed251786b6d43da6ec71.tar.bz2 linux-stable-37925e050379ef4db9f4ed251786b6d43da6ec71.zip | |
epca: lock_kernel push down
Prepare epca for removing the lock from above. Most of epca is internally
locked so we can trivially push it down to a few bits of code. Drop the TIOCG/SSOFTCAR handling as that is done *properly* with locks by the mid 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/epca.c')
| -rw-r--r-- | drivers/char/epca.c | 17 |
1 files changed, 2 insertions, 15 deletions
diff --git a/drivers/char/epca.c b/drivers/char/epca.c index ffd747c5dff0..9a682851283e 100644 --- a/drivers/char/epca.c +++ b/drivers/char/epca.c @@ -2206,21 +2206,6 @@ static int pc_ioctl(struct tty_struct *tty, struct file * file, tty_wait_until_sent(tty, 0); digi_send_break(ch, arg ? arg*(HZ/10) : HZ/4); return 0; - case TIOCGSOFTCAR: - if (put_user(C_CLOCAL(tty)?1:0, (unsigned long __user *)arg)) - return -EFAULT; - return 0; - case TIOCSSOFTCAR: - { - unsigned int value; - - if (get_user(value, (unsigned __user *)argp)) - return -EFAULT; - tty->termios->c_cflag = - ((tty->termios->c_cflag & ~CLOCAL) | - (value ? CLOCAL : 0)); - return 0; - } case TIOCMODG: mflag = pc_tiocmget(tty, file); if (put_user(mflag, (unsigned long __user *)argp)) @@ -2253,6 +2238,7 @@ static int pc_ioctl(struct tty_struct *tty, struct file * file, break; case DIGI_SETAW: case DIGI_SETAF: + lock_kernel(); if (cmd == DIGI_SETAW) { /* Setup an event to indicate when the transmit buffer empties */ spin_lock_irqsave(&epca_lock, flags); @@ -2264,6 +2250,7 @@ static int pc_ioctl(struct tty_struct *tty, struct file * file, if (tty->ldisc.flush_buffer) tty->ldisc.flush_buffer(tty); } + unlock_kernel(); /* Fall Thru */ case DIGI_SETA: if (copy_from_user(&ch->digiext, argp, sizeof(digi_t))) |