diff options
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/moxa.c | 58 |
1 files changed, 25 insertions, 33 deletions
diff --git a/drivers/char/moxa.c b/drivers/char/moxa.c index 474d936d3b31..7ab720f1f30c 100644 --- a/drivers/char/moxa.c +++ b/drivers/char/moxa.c @@ -151,10 +151,10 @@ struct mon_str { }; /* statusflags */ -#define TXSTOPPED 0x1 -#define LOWWAIT 0x2 -#define EMPTYWAIT 0x4 -#define THROTTLE 0x8 +#define TXSTOPPED 1 +#define LOWWAIT 2 +#define EMPTYWAIT 3 +#define THROTTLE 4 #define SERIAL_DO_RESTART @@ -235,6 +235,8 @@ static void MoxaSetFifo(struct moxa_port *port, int enable); * I/O functions */ +static DEFINE_SPINLOCK(moxafunc_lock); + static void moxa_wait_finish(void __iomem *ofsAddr) { unsigned long end = jiffies + moxaFuncTout; @@ -381,14 +383,14 @@ copy: break; } case TIOCGSERIAL: - mutex_lock(&moxa_openlock); + mutex_lock(&ch->port.mutex); ret = moxa_get_serial_info(ch, argp); - mutex_unlock(&moxa_openlock); + mutex_unlock(&ch->port.mutex); break; case TIOCSSERIAL: - mutex_lock(&moxa_openlock); + mutex_lock(&ch->port.mutex); ret = moxa_set_serial_info(ch, argp); - mutex_unlock(&moxa_openlock); + mutex_unlock(&ch->port.mutex); break; default: ret = -ENOIOCTLCMD; @@ -433,7 +435,6 @@ static const struct tty_port_operations moxa_port_ops = { static struct tty_driver *moxaDriver; static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0); static DEFINE_SPINLOCK(moxa_lock); -static DEFINE_SPINLOCK(moxafunc_lock); /* * HW init @@ -1208,9 +1209,7 @@ static void moxa_close(struct tty_struct *tty, struct file *filp) { struct moxa_port *ch = tty->driver_data; ch->cflag = tty->termios->c_cflag; - mutex_lock(&moxa_openlock); tty_port_close(&ch->port, tty, filp); - mutex_unlock(&moxa_openlock); } static int moxa_write(struct tty_struct *tty, @@ -1226,7 +1225,7 @@ static int moxa_write(struct tty_struct *tty, len = MoxaPortWriteData(tty, buf, count); spin_unlock_bh(&moxa_lock); - ch->statusflags |= LOWWAIT; + set_bit(LOWWAIT, &ch->statusflags); return len; } @@ -1264,7 +1263,7 @@ static int moxa_chars_in_buffer(struct tty_struct *tty) * Make it possible to wakeup anything waiting for output * in tty_ioctl.c, etc. */ - if (!(ch->statusflags & EMPTYWAIT)) + if (!test_bit(EMPTYWAIT, &ch->statusflags)) moxa_setup_empty_event(tty); } unlock_kernel(); @@ -1332,14 +1331,14 @@ static void moxa_throttle(struct tty_struct *tty) { struct moxa_port *ch = tty->driver_data; - ch->statusflags |= THROTTLE; + set_bit(THROTTLE, &ch->statusflags); } static void moxa_unthrottle(struct tty_struct *tty) { struct moxa_port *ch = tty->driver_data; - ch->statusflags &= ~THROTTLE; + clear_bit(THROTTLE, &ch->statusflags); } static void moxa_set_termios(struct tty_struct *tty, @@ -1361,7 +1360,7 @@ static void moxa_stop(struct tty_struct *tty) if (ch == NULL) return; MoxaPortTxDisable(ch); - ch->statusflags |= TXSTOPPED; + set_bit(TXSTOPPED, &ch->statusflags); } @@ -1376,17 +1375,13 @@ static void moxa_start(struct tty_struct *tty) return; MoxaPortTxEnable(ch); - ch->statusflags &= ~TXSTOPPED; + clear_bit(TXSTOPPED, &ch->statusflags); } static void moxa_hangup(struct tty_struct *tty) { - struct moxa_port *ch; - - mutex_lock(&moxa_openlock); - ch = tty->driver_data; + struct moxa_port *ch = tty->driver_data; tty_port_hangup(&ch->port); - mutex_unlock(&moxa_openlock); } static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd) @@ -1412,24 +1407,24 @@ static int moxa_poll_port(struct moxa_port *p, unsigned int handle, u16 intr; if (tty) { - if ((p->statusflags & EMPTYWAIT) && + if (test_bit(EMPTYWAIT, &p->statusflags) && MoxaPortTxQueue(p) == 0) { - p->statusflags &= ~EMPTYWAIT; + clear_bit(EMPTYWAIT, &p->statusflags); tty_wakeup(tty); } - if ((p->statusflags & LOWWAIT) && !tty->stopped && + if (test_bit(LOWWAIT, &p->statusflags) && !tty->stopped && MoxaPortTxQueue(p) <= WAKEUP_CHARS) { - p->statusflags &= ~LOWWAIT; + clear_bit(LOWWAIT, &p->statusflags); tty_wakeup(tty); } - if (inited && !(p->statusflags & THROTTLE) && + if (inited && !test_bit(THROTTLE, &p->statusflags) && MoxaPortRxQueue(p) > 0) { /* RX */ MoxaPortReadData(p); tty_schedule_flip(tty); } } else { - p->statusflags &= ~EMPTYWAIT; + clear_bit(EMPTYWAIT, &p->statusflags); MoxaPortFlushData(p, 0); /* flush RX */ } @@ -1533,10 +1528,7 @@ static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_term static void moxa_setup_empty_event(struct tty_struct *tty) { struct moxa_port *ch = tty->driver_data; - - spin_lock_bh(&moxa_lock); - ch->statusflags |= EMPTYWAIT; - spin_unlock_bh(&moxa_lock); + set_bit(EMPTYWAIT, &ch->statusflags); } /***************************************************************************** @@ -1845,7 +1837,7 @@ static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio, writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1); writeb(FC_SetXonXoff, ofsAddr + FuncCode); moxa_wait_finish(ofsAddr); - spin_unlock_irqrestore(&moxafunc_lock); + spin_unlock_irq(&moxafunc_lock); } return baud; |