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rs232: remove unneeded lock()/unlock() functions

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Change-Id: Ie1d2a7f460132aa59791cd7d16c9068b79675f1b
This commit is contained in:
Michael W. Bombardieri 2013-04-12 11:28:12 +02:00 committed by Ben Gras
parent a0a1440a52
commit cb51426c6a
1 changed files with 0 additions and 27 deletions
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27
drivers/tty/arch/i386/rs232.c
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@ -194,10 +194,6 @@ static int rs_close(tty_t *tp, int try);
static void out_int(rs232_t *rs);
static void rs232_handler(rs232_t *rs);
/* XXX */
static void lock(void) {}
static void unlock(void) {}
static int my_inb(port_t port)
{
int r;
@ -221,10 +217,8 @@ static int rs_write(register tty_t *tp, int try)
if (rs->inhibited != tp->tty_inhibited) {
/* Inhibition state has changed. */
lock();
rs->ostate |= OSWREADY;
if (tp->tty_inhibited) rs->ostate &= ~OSWREADY;
unlock();
rs->inhibited = tp->tty_inhibited;
}
@ -265,10 +259,8 @@ static int rs_write(register tty_t *tp, int try)
tp->tty_reprint = TRUE;
/* Bookkeeping. */
lock(); /* protect interrupt sensitive rs->ocount */
rs->ocount += ocount;
rs_ostart(rs);
unlock();
if ((rs->ohead += ocount) >= bufend(rs->obuf))
rs->ohead -= buflen(rs->obuf);
tp->tty_outoffset += count;
@ -320,10 +312,8 @@ int c; /* character to echo */
out_process(tp, rs->obuf, rs->ohead, bufend(rs->obuf), &count, &ocount);
if (count == 0) return;
lock();
rs->ocount += ocount;
rs_ostart(rs);
unlock();
if ((rs->ohead += ocount) >= bufend(rs->obuf)) rs->ohead -= buflen(rs->obuf);
}
@ -404,13 +394,6 @@ static void rs_config(rs232_t *rs)
if (divisor >= (UART_FREQ / 110)) line_controls |= LC_2STOP_BITS;
line_controls |= (tp->tty_termios.c_cflag & CSIZE) >> 2;
/* Lock out interrupts while setting the speed. The receiver register is
* going to be hidden by the div_low register, but the input interrupt
* handler relies on reading it to clear the interrupt and avoid looping
* forever.
*/
lock();
/* Select the baud rate divisor registers and change the rate. */
sys_outb(rs->line_ctl_port, LC_ADDRESS_DIVISOR);
sys_outb(rs->div_low_port, divisor);
@ -422,8 +405,6 @@ static void rs_config(rs232_t *rs)
rs->ostate = devready(rs) | ORAW | OSWREADY; /* reads modem_ctl_port */
if ((tp->tty_termios.c_lflag & IXON) && rs->oxoff != _POSIX_VDISABLE)
rs->ostate &= ~ORAW;
unlock();
}
/*===========================================================================*
@ -559,11 +540,9 @@ static int rs_icancel(tty_t *tp, int UNUSED(dummy))
/* Cancel waiting input. */
rs232_t *rs = tp->tty_priv;
lock();
rs->icount = 0;
rs->itail = rs->ihead;
istart(rs);
unlock();
return 0; /* dummy */
}
@ -576,11 +555,9 @@ static int rs_ocancel(tty_t *tp, int UNUSED(dummy))
/* Cancel pending output. */
rs232_t *rs = tp->tty_priv;
lock();
rs->ostate &= ~(ODONE | OQUEUED);
rs->ocount = 0;
rs->otail = rs->ohead;
unlock();
return 0; /* dummy */
}
@ -598,10 +575,8 @@ static int rs_read(tty_t *tp, int try)
if (!(tp->tty_termios.c_cflag & CLOCAL)) {
if (try) return 1;
/* Send a SIGHUP if hangup detected. */
lock();
ostate = rs->ostate;
rs->ostate &= ~ODEVHUP; /* save ostate, clear DEVHUP */
unlock();
if (ostate & ODEVHUP) {
sigchar(tp, SIGHUP, 1);
tp->tty_termios.c_ospeed = B0; /* Disable further I/O. */
@ -622,10 +597,8 @@ static int rs_read(tty_t *tp, int try)
/* Perform input processing on (part of) the input buffer. */
if ((count = in_process(tp, rs->itail, count, -1)) == 0) break;
lock(); /* protect interrupt sensitive variables */
rs->icount -= count;
if (!rs->idevready && rs->icount < RS_ILOWWATER) istart(rs);
unlock();
if ((rs->itail += count) == bufend(rs->ibuf)) rs->itail = rs->ibuf;
}