[PATCH 35/68] TTY: amiserial, pass tty down to functions
From: Jiri Slaby
Date: Mon Mar 05 2012 - 08:53:23 EST
This avoids pain with tty refcounting and touching tty_port in the
future. It allows us to remove some info->tty tests because the tty
passed down to them can never be NULL.
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
---
drivers/tty/amiserial.c | 91 ++++++++++++++++++++++-------------------------
1 file changed, 42 insertions(+), 49 deletions(-)
diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c
index 165cd79..5b87744 100644
--- a/drivers/tty/amiserial.c
+++ b/drivers/tty/amiserial.c
@@ -102,7 +102,8 @@ static struct tty_driver *serial_driver;
static unsigned char current_ctl_bits;
-static void change_speed(struct serial_state *info, struct ktermios *old);
+static void change_speed(struct tty_struct *tty, struct serial_state *info,
+ struct ktermios *old);
static void rs_wait_until_sent(struct tty_struct *tty, int timeout);
@@ -500,7 +501,7 @@ static irqreturn_t ser_tx_int(int irq, void *dev_id)
* ---------------------------------------------------------------
*/
-static int startup(struct serial_state *info)
+static int startup(struct tty_struct *tty, struct serial_state *info)
{
unsigned long flags;
int retval=0;
@@ -534,9 +535,7 @@ static int startup(struct serial_state *info)
retval = request_irq(IRQ_AMIGA_VERTB, ser_vbl_int, 0, "serial status", info);
if (retval) {
if (serial_isroot()) {
- if (info->tty)
- set_bit(TTY_IO_ERROR,
- &info->tty->flags);
+ set_bit(TTY_IO_ERROR, &tty->flags);
retval = 0;
}
goto errout;
@@ -551,32 +550,29 @@ static int startup(struct serial_state *info)
current_ctl_bits = ciab.pra & (SER_DCD | SER_CTS | SER_DSR);
info->MCR = 0;
- if (info->tty->termios->c_cflag & CBAUD)
+ if (C_BAUD(tty))
info->MCR = SER_DTR | SER_RTS;
rtsdtr_ctrl(info->MCR);
- if (info->tty)
- clear_bit(TTY_IO_ERROR, &info->tty->flags);
+ clear_bit(TTY_IO_ERROR, &tty->flags);
info->xmit.head = info->xmit.tail = 0;
/*
* Set up the tty->alt_speed kludge
*/
- if (info->tty) {
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
- info->tty->alt_speed = 57600;
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
- info->tty->alt_speed = 115200;
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
- info->tty->alt_speed = 230400;
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
- info->tty->alt_speed = 460800;
- }
+ if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
+ tty->alt_speed = 57600;
+ if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
+ tty->alt_speed = 115200;
+ if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
+ tty->alt_speed = 230400;
+ if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
+ tty->alt_speed = 460800;
/*
* and set the speed of the serial port
*/
- change_speed(info, NULL);
+ change_speed(tty, info, NULL);
info->flags |= ASYNC_INITIALIZED;
local_irq_restore(flags);
@@ -591,7 +587,7 @@ errout:
* This routine will shutdown a serial port; interrupts are disabled, and
* DTR is dropped if the hangup on close termio flag is on.
*/
-static void shutdown(struct serial_state *info)
+static void shutdown(struct tty_struct *tty, struct serial_state *info)
{
unsigned long flags;
struct serial_state *state;
@@ -631,12 +627,11 @@ static void shutdown(struct serial_state *info)
custom.adkcon = AC_UARTBRK;
mb();
- if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
+ if (tty->termios->c_cflag & HUPCL)
info->MCR &= ~(SER_DTR|SER_RTS);
rtsdtr_ctrl(info->MCR);
- if (info->tty)
- set_bit(TTY_IO_ERROR, &info->tty->flags);
+ set_bit(TTY_IO_ERROR, &tty->flags);
info->flags &= ~ASYNC_INITIALIZED;
local_irq_restore(flags);
@@ -647,7 +642,7 @@ static void shutdown(struct serial_state *info)
* This routine is called to set the UART divisor registers to match
* the specified baud rate for a serial port.
*/
-static void change_speed(struct serial_state *info,
+static void change_speed(struct tty_struct *tty, struct serial_state *info,
struct ktermios *old_termios)
{
int quot = 0, baud_base, baud;
@@ -655,9 +650,7 @@ static void change_speed(struct serial_state *info,
int bits;
unsigned long flags;
- if (!info->tty || !info->tty->termios)
- return;
- cflag = info->tty->termios->c_cflag;
+ cflag = tty->termios->c_cflag;
/* Byte size is always 8 bits plus parity bit if requested */
@@ -678,7 +671,7 @@ static void change_speed(struct serial_state *info,
#endif
/* Determine divisor based on baud rate */
- baud = tty_get_baud_rate(info->tty);
+ baud = tty_get_baud_rate(tty);
if (!baud)
baud = 9600; /* B0 transition handled in rs_set_termios */
baud_base = info->baud_base;
@@ -695,9 +688,9 @@ static void change_speed(struct serial_state *info,
/* If the quotient is zero refuse the change */
if (!quot && old_termios) {
/* FIXME: Will need updating for new tty in the end */
- info->tty->termios->c_cflag &= ~CBAUD;
- info->tty->termios->c_cflag |= (old_termios->c_cflag & CBAUD);
- baud = tty_get_baud_rate(info->tty);
+ tty->termios->c_cflag &= ~CBAUD;
+ tty->termios->c_cflag |= (old_termios->c_cflag & CBAUD);
+ baud = tty_get_baud_rate(tty);
if (!baud)
baud = 9600;
if (baud == 38400 &&
@@ -742,24 +735,24 @@ static void change_speed(struct serial_state *info,
*/
info->read_status_mask = UART_LSR_OE | UART_LSR_DR;
- if (I_INPCK(info->tty))
+ if (I_INPCK(tty))
info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
- if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
+ if (I_BRKINT(tty) || I_PARMRK(tty))
info->read_status_mask |= UART_LSR_BI;
/*
* Characters to ignore
*/
info->ignore_status_mask = 0;
- if (I_IGNPAR(info->tty))
+ if (I_IGNPAR(tty))
info->ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
- if (I_IGNBRK(info->tty)) {
+ if (I_IGNBRK(tty)) {
info->ignore_status_mask |= UART_LSR_BI;
/*
* If we're ignore parity and break indicators, ignore
* overruns too. (For real raw support).
*/
- if (I_IGNPAR(info->tty))
+ if (I_IGNPAR(tty))
info->ignore_status_mask |= UART_LSR_OE;
}
/*
@@ -1038,7 +1031,7 @@ static int get_serial_info(struct serial_state *state,
return 0;
}
-static int set_serial_info(struct serial_state *state,
+static int set_serial_info(struct tty_struct *tty, struct serial_state *state,
struct serial_struct __user * new_info)
{
struct serial_struct new_serial;
@@ -1086,23 +1079,23 @@ static int set_serial_info(struct serial_state *state,
state->custom_divisor = new_serial.custom_divisor;
state->close_delay = new_serial.close_delay * HZ/100;
state->closing_wait = new_serial.closing_wait * HZ/100;
- state->tty->low_latency = (state->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+ tty->low_latency = (state->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
check_and_exit:
if (state->flags & ASYNC_INITIALIZED) {
if (change_spd) {
if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
- state->tty->alt_speed = 57600;
+ tty->alt_speed = 57600;
if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
- state->tty->alt_speed = 115200;
+ tty->alt_speed = 115200;
if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
- state->tty->alt_speed = 230400;
+ tty->alt_speed = 230400;
if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
- state->tty->alt_speed = 460800;
- change_speed(state, NULL);
+ tty->alt_speed = 460800;
+ change_speed(tty, state, NULL);
}
} else
- retval = startup(state);
+ retval = startup(tty, state);
tty_unlock();
return retval;
}
@@ -1256,7 +1249,7 @@ static int rs_ioctl(struct tty_struct *tty,
case TIOCGSERIAL:
return get_serial_info(info, argp);
case TIOCSSERIAL:
- return set_serial_info(info, argp);
+ return set_serial_info(tty, info, argp);
case TIOCSERCONFIG:
return 0;
@@ -1319,7 +1312,7 @@ static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
unsigned long flags;
unsigned int cflag = tty->termios->c_cflag;
- change_speed(info, old_termios);
+ change_speed(tty, info, old_termios);
/* Handle transition to B0 status */
if ((old_termios->c_cflag & CBAUD) &&
@@ -1444,7 +1437,7 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
*/
rs_wait_until_sent(tty, state->timeout);
}
- shutdown(state);
+ shutdown(tty, state);
rs_flush_buffer(tty);
tty_ldisc_flush(tty);
@@ -1535,7 +1528,7 @@ static void rs_hangup(struct tty_struct *tty)
return;
rs_flush_buffer(tty);
- shutdown(info);
+ shutdown(tty, info);
info->count = 0;
info->flags &= ~ASYNC_NORMAL_ACTIVE;
info->tty = NULL;
@@ -1696,7 +1689,7 @@ static int rs_open(struct tty_struct *tty, struct file * filp)
/*
* Start up serial port
*/
- retval = startup(info);
+ retval = startup(tty, info);
if (retval) {
return retval;
}
--
1.7.9.2
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