tty: moxa: Kill the use of lock_kernel

It isn't needed here any more

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 14 deletions

diff --git a/drivers/char/moxa.c b/drivers/char/moxa.c
index ac06d0131db5..d53fac5229bf 100644
--- a/drivers/char/moxa.c
+++ b/drivers/char/moxa.c
@@ -34,7 +34,6 @@
 #include <linux/tty.h>
 #include <linux/tty_flip.h>
 #include <linux/major.h>
-#include <linux/smp_lock.h>
 #include <linux/string.h>
 #include <linux/fcntl.h>
 #include <linux/ptrace.h>
@@ -202,7 +201,6 @@ static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
                          unsigned int set, unsigned int clear);
 static void moxa_poll(unsigned long);
 static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
-static void moxa_setup_empty_event(struct tty_struct *);
 static void moxa_shutdown(struct tty_port *);
 static int moxa_carrier_raised(struct tty_port *);
 static void moxa_dtr_rts(struct tty_port *, int);
@@ -1251,17 +1249,13 @@ static int moxa_chars_in_buffer(struct tty_struct *tty)
         struct moxa_port *ch = tty->driver_data;
         int chars;
 
-        lock_kernel();
         chars = MoxaPortTxQueue(ch);
-        if (chars) {
+        if (chars)
                 /*
                  * Make it possible to wakeup anything waiting for output
                  * in tty_ioctl.c, etc.
                  */
-                if (!test_bit(EMPTYWAIT, &ch->statusflags))
-                        moxa_setup_empty_event(tty);
-        }
-        unlock_kernel();
+                set_bit(EMPTYWAIT, &ch->statusflags);
         return chars;
 }
 
@@ -1503,12 +1497,6 @@ static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_term
         tty_encode_baud_rate(tty, baud, baud);
 }
 
-static void moxa_setup_empty_event(struct tty_struct *tty)
-{
-        struct moxa_port *ch = tty->driver_data;
-        set_bit(EMPTYWAIT, &ch->statusflags);
-}
-
 /*****************************************************************************
  *      Driver level functions:                                              *
  *****************************************************************************/