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authorAlan Cox <alan@lxorguk.ukuu.org.uk>2008-04-30 00:53:59 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-30 08:29:45 -0700
commit978e595f88a1fba5869aa42a4af4fba36f33ecac (patch)
tree60848f49949c5b7b518621ee36cdc6d500244539 /drivers/serial/68360serial.c
parentac0e4b7d319bf284bb64bc7e1c051417386b34a4 (diff)
tty/serial: lay the foundations for the next set of reworks
- Stop drivers calling their own flush method indirectly, it obfuscates code and it will change soon anyway - A few more lock_kernel paths temporarily needed in some driver internal waiting code - Remove private put_char method that does a write call for one char - we have that anyway - Most but not yet all of the termios copy under lock fixing (some has other dependencies to follow) - Note a few locking bugs in drivers found in the process - Kill remaining [ab]users of TIOCG/SSOFTCAR in the driver, these must go to fix the termios locking Signed-off-by: Alan Cox <alan@redhat.com> Cc: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/serial/68360serial.c')
-rw-r--r--drivers/serial/68360serial.c17
1 files changed, 3 insertions, 14 deletions
diff --git a/drivers/serial/68360serial.c b/drivers/serial/68360serial.c
index 6f540107d0bb..f4f737bfa0a7 100644
--- a/drivers/serial/68360serial.c
+++ b/drivers/serial/68360serial.c
@@ -1436,18 +1436,6 @@ static int rs_360_ioctl(struct tty_struct *tty, struct file * file,
return retval;
end_break(info);
return 0;
- case TIOCGSOFTCAR:
- /* return put_user(C_CLOCAL(tty) ? 1 : 0, (int *) arg); */
- put_user(C_CLOCAL(tty) ? 1 : 0, (int *) arg);
- return 0;
- case TIOCSSOFTCAR:
- error = get_user(arg, (unsigned int *) arg);
- if (error)
- return error;
- tty->termios->c_cflag =
- ((tty->termios->c_cflag & ~CLOCAL) |
- (arg ? CLOCAL : 0));
- return 0;
#ifdef maybe
case TIOCSERGETLSR: /* Get line status register */
return get_lsr_info(info, (unsigned int *) arg);
@@ -1665,8 +1653,7 @@ static void rs_360_close(struct tty_struct *tty, struct file * filp)
rs_360_wait_until_sent(tty, info->timeout);
}
shutdown(info);
- if (tty->driver->flush_buffer)
- tty->driver->flush_buffer(tty);
+ rs_360_flush_buffer(tty);
tty_ldisc_flush(tty);
tty->closing = 0;
info->event = 0;
@@ -1717,6 +1704,7 @@ static void rs_360_wait_until_sent(struct tty_struct *tty, int timeout)
printk("jiff=%lu...", jiffies);
#endif
+ lock_kernel();
/* We go through the loop at least once because we can't tell
* exactly when the last character exits the shifter. There can
* be at least two characters waiting to be sent after the buffers
@@ -1745,6 +1733,7 @@ static void rs_360_wait_until_sent(struct tty_struct *tty, int timeout)
bdp--;
} while (bdp->status & BD_SC_READY);
current->state = TASK_RUNNING;
+ unlock_kernel();
#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
#endif