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Diffstat (limited to 'drivers/serial')
-rw-r--r--drivers/serial/68328serial.c102
-rw-r--r--drivers/serial/crisv10.c6
-rw-r--r--drivers/serial/jsm/jsm_tty.c7
3 files changed, 44 insertions, 71 deletions
diff --git a/drivers/serial/68328serial.c b/drivers/serial/68328serial.c
index b88a7c1158a..bff94541991 100644
--- a/drivers/serial/68328serial.c
+++ b/drivers/serial/68328serial.c
@@ -131,17 +131,6 @@ static int m68328_console_baud = CONSOLE_BAUD_RATE;
static int m68328_console_cbaud = DEFAULT_CBAUD;
-/*
- * tmp_buf is used as a temporary buffer by serial_write. We need to
- * lock it in case the memcpy_fromfs blocks while swapping in a page,
- * and some other program tries to do a serial write at the same time.
- * Since the lock will only come under contention when the system is
- * swapping and available memory is low, it makes sense to share one
- * buffer across all the serial ports, since it significantly saves
- * memory if large numbers of serial ports are open.
- */
-static unsigned char tmp_buf[SERIAL_XMIT_SIZE]; /* This is cheating */
-
static inline int serial_paranoia_check(struct m68k_serial *info,
char *name, const char *routine)
{
@@ -211,16 +200,16 @@ static void rs_stop(struct tty_struct *tty)
if (serial_paranoia_check(info, tty->name, "rs_stop"))
return;
- save_flags(flags); cli();
+ local_irq_save(flags);
uart->ustcnt &= ~USTCNT_TXEN;
- restore_flags(flags);
+ local_irq_restore(flags);
}
static void rs_put_char(char ch)
{
int flags, loops = 0;
- save_flags(flags); cli();
+ local_irq_save(flags);
while (!(UTX & UTX_TX_AVAIL) && (loops < 1000)) {
loops++;
@@ -229,7 +218,7 @@ static void rs_put_char(char ch)
UTX_TXDATA = ch;
udelay(5);
- restore_flags(flags);
+ local_irq_restore(flags);
}
static void rs_start(struct tty_struct *tty)
@@ -241,7 +230,7 @@ static void rs_start(struct tty_struct *tty)
if (serial_paranoia_check(info, tty->name, "rs_start"))
return;
- save_flags(flags); cli();
+ local_irq_save(flags);
if (info->xmit_cnt && info->xmit_buf && !(uart->ustcnt & USTCNT_TXEN)) {
#ifdef USE_INTS
uart->ustcnt |= USTCNT_TXEN | USTCNT_TX_INTR_MASK;
@@ -249,7 +238,7 @@ static void rs_start(struct tty_struct *tty)
uart->ustcnt |= USTCNT_TXEN;
#endif
}
- restore_flags(flags);
+ local_irq_restore(flags);
}
/* Drop into either the boot monitor or kadb upon receiving a break
@@ -327,14 +316,6 @@ static void receive_chars(struct m68k_serial *info, struct pt_regs *regs,
if(!tty)
goto clear_and_exit;
- /*
- * Make sure that we do not overflow the buffer
- */
- if (tty_request_buffer_room(tty, 1) == 0) {
- tty_schedule_flip(tty);
- return;
- }
-
flag = TTY_NORMAL;
if(rx & URX_PARITY_ERROR) {
@@ -473,7 +454,7 @@ static int startup(struct m68k_serial * info)
return -ENOMEM;
}
- save_flags(flags); cli();
+ local_irq_save(flags);
/*
* Clear the FIFO buffers and disable them
@@ -506,7 +487,7 @@ static int startup(struct m68k_serial * info)
change_speed(info);
info->flags |= S_INITIALIZED;
- restore_flags(flags);
+ local_irq_restore(flags);
return 0;
}
@@ -523,7 +504,7 @@ static void shutdown(struct m68k_serial * info)
if (!(info->flags & S_INITIALIZED))
return;
- save_flags(flags); cli(); /* Disable interrupts */
+ local_irq_save(flags);
if (info->xmit_buf) {
free_page((unsigned long) info->xmit_buf);
@@ -534,7 +515,7 @@ static void shutdown(struct m68k_serial * info)
set_bit(TTY_IO_ERROR, &info->tty->flags);
info->flags &= ~S_INITIALIZED;
- restore_flags(flags);
+ local_irq_restore(flags);
}
struct {
@@ -655,24 +636,24 @@ static void rs_fair_output(void)
if (info == 0) return;
if (info->xmit_buf == 0) return;
- save_flags(flags); cli();
+ local_irq_save(flags);
left = info->xmit_cnt;
while (left != 0) {
c = info->xmit_buf[info->xmit_tail];
info->xmit_tail = (info->xmit_tail+1) & (SERIAL_XMIT_SIZE-1);
info->xmit_cnt--;
- restore_flags(flags);
+ local_irq_restore(flags);
rs_put_char(c);
- save_flags(flags); cli();
+ local_irq_save(flags);
left = min(info->xmit_cnt, left-1);
}
/* Last character is being transmitted now (hopefully). */
udelay(5);
- restore_flags(flags);
+ local_irq_restore(flags);
return;
}
@@ -720,11 +701,11 @@ static void rs_flush_chars(struct tty_struct *tty)
#endif
/* Enable transmitter */
- save_flags(flags); cli();
+ local_irq_save(flags);
if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
!info->xmit_buf) {
- restore_flags(flags);
+ local_irq_restore(flags);
return;
}
@@ -749,7 +730,7 @@ static void rs_flush_chars(struct tty_struct *tty)
while (!(uart->utx.w & UTX_TX_AVAIL)) udelay(5);
}
#endif
- restore_flags(flags);
+ local_irq_restore(flags);
}
extern void console_printn(const char * b, int count);
@@ -768,18 +749,22 @@ static int rs_write(struct tty_struct * tty,
if (!tty || !info->xmit_buf)
return 0;
- save_flags(flags);
+ local_save_flags(flags);
while (1) {
- cli();
+ local_irq_disable();
c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
SERIAL_XMIT_SIZE - info->xmit_head));
+ local_irq_restore(flags);
+
if (c <= 0)
break;
memcpy(info->xmit_buf + info->xmit_head, buf, c);
+
+ local_irq_disable();
info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
info->xmit_cnt += c;
- restore_flags(flags);
+ local_irq_restore(flags);
buf += c;
count -= c;
total += c;
@@ -787,7 +772,7 @@ static int rs_write(struct tty_struct * tty,
if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
/* Enable transmitter */
- cli();
+ local_irq_disable();
#ifndef USE_INTS
while(info->xmit_cnt) {
#endif
@@ -807,9 +792,9 @@ static int rs_write(struct tty_struct * tty,
#ifndef USE_INTS
}
#endif
- restore_flags(flags);
+ local_irq_restore(flags);
}
- restore_flags(flags);
+
return total;
}
@@ -838,12 +823,13 @@ static int rs_chars_in_buffer(struct tty_struct *tty)
static void rs_flush_buffer(struct tty_struct *tty)
{
struct m68k_serial *info = (struct m68k_serial *)tty->driver_data;
+ unsigned long flags;
if (serial_paranoia_check(info, tty->name, "rs_flush_buffer"))
return;
- cli();
+ local_irq_save(flags);
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
- sti();
+ local_irq_restore(flags);
tty_wakeup(tty);
}
@@ -973,14 +959,15 @@ static int get_lsr_info(struct m68k_serial * info, unsigned int *value)
m68328_uart *uart = &uart_addr[info->line];
#endif
unsigned char status;
+ unsigned long flags;
- cli();
+ local_irq_save(flags);
#ifdef CONFIG_SERIAL_68328_RTS_CTS
status = (uart->utx.w & UTX_CTS_STAT) ? 1 : 0;
#else
status = 0;
#endif
- sti();
+ local_irq_restore(flags);
put_user(status,value);
return 0;
}
@@ -994,14 +981,13 @@ static void send_break(struct m68k_serial * info, unsigned int duration)
unsigned long flags;
if (!info->port)
return;
- save_flags(flags);
- cli();
+ local_irq_save(flags);
#ifdef USE_INTS
uart->utx.w |= UTX_SEND_BREAK;
msleep_interruptible(duration);
uart->utx.w &= ~UTX_SEND_BREAK;
#endif
- restore_flags(flags);
+ local_irq_restore(flags);
}
static int rs_ioctl(struct tty_struct *tty, struct file * file,
@@ -1060,7 +1046,7 @@ static int rs_ioctl(struct tty_struct *tty, struct file * file,
(struct serial_struct *) arg);
case TIOCSERGETLSR: /* Get line status register */
if (access_ok(VERIFY_WRITE, (void *) arg,
- sizeof(unsigned int));
+ sizeof(unsigned int)))
return get_lsr_info(info, (unsigned int *) arg);
return -EFAULT;
case TIOCSERGSTRUCT:
@@ -1113,10 +1099,10 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
if (!info || serial_paranoia_check(info, tty->name, "rs_close"))
return;
- save_flags(flags); cli();
+ local_irq_save(flags);
if (tty_hung_up_p(filp)) {
- restore_flags(flags);
+ local_irq_restore(flags);
return;
}
@@ -1138,7 +1124,7 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
info->count = 0;
}
if (info->count) {
- restore_flags(flags);
+ local_irq_restore(flags);
return;
}
info->flags |= S_CLOSING;
@@ -1186,7 +1172,7 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
}
info->flags &= ~(S_NORMAL_ACTIVE|S_CLOSING);
wake_up_interruptible(&info->close_wait);
- restore_flags(flags);
+ local_irq_restore(flags);
}
/*
@@ -1262,9 +1248,9 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp,
info->count--;
info->blocked_open++;
while (1) {
- cli();
+ local_irq_disable();
m68k_rtsdtr(info, 1);
- sti();
+ local_irq_enable();
current->state = TASK_INTERRUPTIBLE;
if (tty_hung_up_p(filp) ||
!(info->flags & S_INITIALIZED)) {
@@ -1444,7 +1430,7 @@ rs68328_init(void)
return -ENOMEM;
}
- save_flags(flags); cli();
+ local_irq_save(flags);
for(i=0;i<NR_PORTS;i++) {
@@ -1489,7 +1475,7 @@ rs68328_init(void)
serial_pm[i]->data = info;
#endif
}
- restore_flags(flags);
+ local_irq_restore(flags);
return 0;
}
diff --git a/drivers/serial/crisv10.c b/drivers/serial/crisv10.c
index 89700141f87..5cacc5e74a9 100644
--- a/drivers/serial/crisv10.c
+++ b/drivers/serial/crisv10.c
@@ -2573,12 +2573,6 @@ static void flush_to_flip_buffer(struct e100_serial *info)
DFLIP(
if (1) {
-
- if (test_bit(TTY_DONT_FLIP, &tty->flags)) {
- DEBUG_LOG(info->line, "*** TTY_DONT_FLIP set flip.count %i ***\n", tty->flip.count);
- DEBUG_LOG(info->line, "*** recv_cnt %i\n", info->recv_cnt);
- } else {
- }
DEBUG_LOG(info->line, "*** rxtot %i\n", info->icount.rx);
DEBUG_LOG(info->line, "ldisc %lu\n", tty->ldisc.chars_in_buffer(tty));
DEBUG_LOG(info->line, "room %lu\n", tty->ldisc.receive_room(tty));
diff --git a/drivers/serial/jsm/jsm_tty.c b/drivers/serial/jsm/jsm_tty.c
index 7d823705193..f8262e6ad8d 100644
--- a/drivers/serial/jsm/jsm_tty.c
+++ b/drivers/serial/jsm/jsm_tty.c
@@ -589,13 +589,6 @@ void jsm_input(struct jsm_channel *ch)
ld = tty_ldisc_ref(tp);
/*
- * If the DONT_FLIP flag is on, don't flush our buffer, and act
- * like the ld doesn't have any space to put the data right now.
- */
- if (test_bit(TTY_DONT_FLIP, &tp->flags))
- len = 0;
-
- /*
* If we were unable to get a reference to the ld,
* don't flush our buffer, and act like the ld doesn't
* have any space to put the data right now.
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 16:27:31 +0000