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TTY: simserial, pass tty down to functions 

This avoids pain with tty refcounting and touching tty_port in the
future. It allows us to remove some state->tty tests because the tty
passed down to them can never be NULL.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby 2012-03-05 14:52:23 +01:00 committed by Greg Kroah-Hartman
parent 588993dd8d
commit 5e99d54587
1 changed files with 24 additions and 26 deletions
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50
arch/ia64/hp/sim/simserial.c
View File

@ -202,7 +202,8 @@ static int rs_put_char(struct tty_struct *tty, unsigned char ch)
return 1;
}
static void transmit_chars(struct serial_state *info, int *intr_done)
static void transmit_chars(struct tty_struct *tty, struct serial_state *info,
int *intr_done)
{
int count;
unsigned long flags;
@ -220,10 +221,11 @@ static void transmit_chars(struct serial_state *info, int *intr_done)
goto out;
}
if (info->xmit.head == info->xmit.tail || info->tty->stopped || info->tty->hw_stopped) {
if (info->xmit.head == info->xmit.tail || tty->stopped ||
tty->hw_stopped) {
#ifdef SIMSERIAL_DEBUG
printk("transmit_chars: head=%d, tail=%d, stopped=%d\n",
info->xmit.head, info->xmit.tail, info->tty->stopped);
info->xmit.head, info->xmit.tail, tty->stopped);
#endif
goto out;
}
@ -261,7 +263,7 @@ static void rs_flush_chars(struct tty_struct *tty)
!info->xmit.buf)
return;
transmit_chars(info, NULL);
transmit_chars(tty, info, NULL);
}
@ -295,7 +297,7 @@ static int rs_write(struct tty_struct * tty,
*/
if (CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE)
&& !tty->stopped && !tty->hw_stopped) {
transmit_chars(info, NULL);
transmit_chars(tty, info, NULL);
}
return ret;
}
@ -340,7 +342,7 @@ static void rs_send_xchar(struct tty_struct *tty, char ch)
* I guess we could call console->write() directly but
* let's do that for now.
*/
transmit_chars(info, NULL);
transmit_chars(tty, info, NULL);
}
}
@ -442,7 +444,7 @@ static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
* 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;
@ -464,7 +466,7 @@ static void shutdown(struct serial_state *info)
info->xmit.buf = NULL;
}
if (info->tty) set_bit(TTY_IO_ERROR, &info->tty->flags);
set_bit(TTY_IO_ERROR, &tty->flags);
info->flags &= ~ASYNC_INITIALIZED;
}
@ -528,7 +530,7 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
* Now we wait for the transmit buffer to clear; and we notify
* the line discipline to only process XON/XOFF characters.
*/
shutdown(info);
shutdown(tty, info);
rs_flush_buffer(tty);
tty_ldisc_flush(tty);
info->tty = NULL;
@ -563,7 +565,7 @@ static void rs_hangup(struct tty_struct *tty)
rs_flush_buffer(tty);
if (info->flags & ASYNC_CLOSING)
return;
shutdown(info);
shutdown(tty, info);
info->count = 0;
info->flags &= ~ASYNC_NORMAL_ACTIVE;
@ -572,7 +574,7 @@ static void rs_hangup(struct tty_struct *tty)
}
static int startup(struct serial_state *state)
static int startup(struct tty_struct *tty, struct serial_state *state)
{
unsigned long flags;
int retval=0;
@ -590,8 +592,7 @@ static int startup(struct serial_state *state)
}
if (!state->port || !state->type) {
if (state->tty)
set_bit(TTY_IO_ERROR, &state->tty->flags);
set_bit(TTY_IO_ERROR, &tty->flags);
free_page(page);
goto errout;
}
@ -614,8 +615,7 @@ static int startup(struct serial_state *state)
goto errout;
}
if (state->tty)
clear_bit(TTY_IO_ERROR, &state->tty->flags);
clear_bit(TTY_IO_ERROR, &tty->flags);
state->xmit.head = state->xmit.tail = 0;
@ -630,16 +630,14 @@ static int startup(struct serial_state *state)
/*
* Set up the tty->alt_speed kludge
*/
if (state->tty) {
if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
state->tty->alt_speed = 57600;
if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
state->tty->alt_speed = 115200;
if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
state->tty->alt_speed = 230400;
if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
state->tty->alt_speed = 460800;
}
if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
tty->alt_speed = 57600;
if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
tty->alt_speed = 115200;
if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
tty->alt_speed = 230400;
if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
tty->alt_speed = 460800;
state->flags |= ASYNC_INITIALIZED;
local_irq_restore(flags);
@ -699,7 +697,7 @@ 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;
}