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>
diff --git a/arch/ia64/hp/sim/simserial.c b/arch/ia64/hp/sim/simserial.c
index 7b6e60e..a76a27e 100644
--- a/arch/ia64/hp/sim/simserial.c
+++ b/arch/ia64/hp/sim/simserial.c
@@ -202,7 +202,8 @@
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 @@
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 @@
!info->xmit.buf)
return;
- transmit_chars(info, NULL);
+ transmit_chars(tty, info, NULL);
}
@@ -295,7 +297,7 @@
*/
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 @@
* 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 @@
* 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 @@
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 @@
* 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 @@
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 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 @@
}
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 @@
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 @@
/*
* 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 @@
/*
* Start up serial port
*/
- retval = startup(info);
+ retval = startup(tty, info);
if (retval) {
return retval;
}