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Subject[PATCH 28/68] TTY: simserial, use only one copy of async flags
Date
The same as for amiserial. Use only one instance of the flags.

Also remove them from async_struct now. Nobody else uses them.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
---
arch/ia64/hp/sim/simserial.c | 48 ++++++++++++++++++++----------------------
include/linux/serialP.h | 1 -
2 files changed, 23 insertions(+), 26 deletions(-)

diff --git a/arch/ia64/hp/sim/simserial.c b/arch/ia64/hp/sim/simserial.c
index 8f68972..a08a53f 100644
--- a/arch/ia64/hp/sim/simserial.c
+++ b/arch/ia64/hp/sim/simserial.c
@@ -46,7 +46,7 @@

#define NR_PORTS 1 /* only one port for now */

-#define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? IRQF_SHARED : IRQF_DISABLED)
+#define IRQ_T(state) ((state->flags & ASYNC_SHARE_IRQ) ? IRQF_SHARED : IRQF_DISABLED)

static char *serial_name = "SimSerial driver";
static char *serial_version = "0.6";
@@ -455,12 +455,11 @@ static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
static void shutdown(struct async_struct * info)
{
unsigned long flags;
- struct serial_state *state;
+ struct serial_state *state = info->state;
int retval;

- if (!(info->flags & ASYNC_INITIALIZED)) return;
-
- state = info->state;
+ if (!(state->flags & ASYNC_INITIALIZED))
+ return;

#ifdef SIMSERIAL_DEBUG
printk("Shutting down serial port %d (irq %d)....", info->line,
@@ -487,7 +486,8 @@ static void shutdown(struct async_struct * info)
if (IRQ_ports[state->irq]) {
free_irq(state->irq, NULL);
retval = request_irq(state->irq, rs_interrupt_single,
- IRQ_T(info), "serial", NULL);
+ IRQ_T(state), "serial",
+ NULL);

if (retval)
printk(KERN_ERR "serial shutdown: request_irq: error %d"
@@ -503,7 +503,7 @@ static void shutdown(struct async_struct * info)

if (info->tty) set_bit(TTY_IO_ERROR, &info->tty->flags);

- info->flags &= ~ASYNC_INITIALIZED;
+ state->flags &= ~ASYNC_INITIALIZED;
}
local_irq_restore(flags);
}
@@ -560,7 +560,7 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
local_irq_restore(flags);
return;
}
- info->flags |= ASYNC_CLOSING;
+ state->flags |= ASYNC_CLOSING;
local_irq_restore(flags);

/*
@@ -576,7 +576,7 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
schedule_timeout_interruptible(info->close_delay);
wake_up_interruptible(&info->open_wait);
}
- info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
+ state->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
wake_up_interruptible(&info->close_wait);
}

@@ -600,15 +600,13 @@ static void rs_hangup(struct tty_struct *tty)
printk("rs_hangup: called\n");
#endif

- state = info->state;
-
rs_flush_buffer(tty);
- if (info->flags & ASYNC_CLOSING)
+ if (state->flags & ASYNC_CLOSING)
return;
shutdown(info);

state->count = 0;
- info->flags &= ~ASYNC_NORMAL_ACTIVE;
+ state->flags &= ~ASYNC_NORMAL_ACTIVE;
info->tty = NULL;
wake_up_interruptible(&info->open_wait);
}
@@ -633,7 +631,6 @@ static int get_async_struct(int line, struct async_struct **ret_info)
init_waitqueue_head(&info->open_wait);
init_waitqueue_head(&info->close_wait);
info->port = sstate->port;
- info->flags = sstate->flags;
info->xmit_fifo_size = sstate->xmit_fifo_size;
info->line = line;
info->state = sstate;
@@ -661,7 +658,7 @@ startup(struct async_struct *info)

local_irq_save(flags);

- if (info->flags & ASYNC_INITIALIZED) {
+ if (state->flags & ASYNC_INITIALIZED) {
free_page(page);
goto errout;
}
@@ -691,7 +688,8 @@ startup(struct async_struct *info)
} else
handler = rs_interrupt_single;

- retval = request_irq(state->irq, handler, IRQ_T(info), "simserial", NULL);
+ retval = request_irq(state->irq, handler, IRQ_T(state),
+ "simserial", NULL);
if (retval)
goto errout;
}
@@ -721,17 +719,17 @@ startup(struct async_struct *info)
* Set up the tty->alt_speed kludge
*/
if (info->tty) {
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
+ if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
info->tty->alt_speed = 57600;
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
+ if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
info->tty->alt_speed = 115200;
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
+ if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
info->tty->alt_speed = 230400;
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
+ if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
info->tty->alt_speed = 460800;
}

- info->flags |= ASYNC_INITIALIZED;
+ state->flags |= ASYNC_INITIALIZED;
local_irq_restore(flags);
return 0;

@@ -762,7 +760,7 @@ static int rs_open(struct tty_struct *tty, struct file * filp)
#ifdef SIMSERIAL_DEBUG
printk("rs_open %s, count = %d\n", tty->name, info->state->count);
#endif
- info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+ info->tty->low_latency = (info->state->flags & ASYNC_LOW_LATENCY) ? 1 : 0;

if (!tmp_buf) {
page = get_zeroed_page(GFP_KERNEL);
@@ -778,11 +776,11 @@ static int rs_open(struct tty_struct *tty, struct file * filp)
* If the port is the middle of closing, bail out now
*/
if (tty_hung_up_p(filp) ||
- (info->flags & ASYNC_CLOSING)) {
- if (info->flags & ASYNC_CLOSING)
+ (info->state->flags & ASYNC_CLOSING)) {
+ if (info->state->flags & ASYNC_CLOSING)
interruptible_sleep_on(&info->close_wait);
#ifdef SERIAL_DO_RESTART
- return ((info->flags & ASYNC_HUP_NOTIFY) ?
+ return ((info->state->flags & ASYNC_HUP_NOTIFY) ?
-EAGAIN : -ERESTARTSYS);
#else
return -EAGAIN;
diff --git a/include/linux/serialP.h b/include/linux/serialP.h
index beaf39f..6741f57 100644
--- a/include/linux/serialP.h
+++ b/include/linux/serialP.h
@@ -43,7 +43,6 @@ struct serial_state {

struct async_struct {
unsigned long port;
- int flags;
int xmit_fifo_size;
struct serial_state *state;
struct tty_struct *tty;
--
1.7.9.2



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