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authorAlan Cox <alan@lxorguk.ukuu.org.uk>2008-04-30 00:53:17 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-30 08:29:38 -0700
commit37925e050379ef4db9f4ed251786b6d43da6ec71 (patch)
tree774ec9963acd20249a876d6be265da46da0b95d9 /drivers/char/epca.c
parent7b130c0efd7acbdc3cf9b2e7cc9a26e923feec93 (diff)
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.c17
1 files changed, 2 insertions, 15 deletions
diff --git a/drivers/char/epca.c b/drivers/char/epca.c
index ffd747c5dff..9a682851283 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)))