From 76b25a5509bbafdbfc7d7d6b41a3c64947d59360 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Wed, 30 Apr 2008 00:54:03 -0700 Subject: [PATCH] char: switch gs, cyclades and esp to return int for put_char Signed-off-by: Alan Cox Cc: Jiri Slaby Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/char/cyclades.c | 9 +++++---- drivers/char/esp.c | 9 ++++++--- drivers/char/generic_serial.c | 11 ++++++----- include/linux/generic_serial.h | 2 +- 4 files changed, 18 insertions(+), 13 deletions(-) diff --git a/drivers/char/cyclades.c b/drivers/char/cyclades.c index 571e4fab5b..b8fb251f80 100644 --- a/drivers/char/cyclades.c +++ b/drivers/char/cyclades.c @@ -2814,7 +2814,7 @@ static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count) * done stuffing characters into the driver. If there is no room * in the queue, the character is ignored. */ -static void cy_put_char(struct tty_struct *tty, unsigned char ch) +static int cy_put_char(struct tty_struct *tty, unsigned char ch) { struct cyclades_port *info = tty->driver_data; unsigned long flags; @@ -2824,15 +2824,15 @@ static void cy_put_char(struct tty_struct *tty, unsigned char ch) #endif if (serial_paranoia_check(info, tty->name, "cy_put_char")) - return; + return 0; if (!info->xmit_buf) - return; + return 0; spin_lock_irqsave(&info->card->card_lock, flags); if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) { spin_unlock_irqrestore(&info->card->card_lock, flags); - return; + return 0; } info->xmit_buf[info->xmit_head++] = ch; @@ -2841,6 +2841,7 @@ static void cy_put_char(struct tty_struct *tty, unsigned char ch) info->idle_stats.xmit_bytes++; info->idle_stats.xmit_idle = jiffies; spin_unlock_irqrestore(&info->card->card_lock, flags); + return 1; } /* cy_put_char */ /* diff --git a/drivers/char/esp.c b/drivers/char/esp.c index b1f92db313..996d3230c9 100644 --- a/drivers/char/esp.c +++ b/drivers/char/esp.c @@ -1156,24 +1156,27 @@ static void change_speed(struct esp_struct *info) spin_unlock_irqrestore(&info->lock, flags); } -static void rs_put_char(struct tty_struct *tty, unsigned char ch) +static int rs_put_char(struct tty_struct *tty, unsigned char ch) { struct esp_struct *info = (struct esp_struct *)tty->driver_data; unsigned long flags; + int ret = 0; if (serial_paranoia_check(info, tty->name, "rs_put_char")) - return; + return 0; if (!info->xmit_buf) - return; + return 0; spin_lock_irqsave(&info->lock, flags); if (info->xmit_cnt < ESP_XMIT_SIZE - 1) { info->xmit_buf[info->xmit_head++] = ch; info->xmit_head &= ESP_XMIT_SIZE-1; info->xmit_cnt++; + ret = 1; } spin_unlock_irqrestore(&info->lock, flags); + return ret; } static void rs_flush_chars(struct tty_struct *tty) diff --git a/drivers/char/generic_serial.c b/drivers/char/generic_serial.c index f6610f28d6..149518e22f 100644 --- a/drivers/char/generic_serial.c +++ b/drivers/char/generic_serial.c @@ -48,19 +48,19 @@ static int gs_debug; module_param(gs_debug, int, 0644); -void gs_put_char(struct tty_struct * tty, unsigned char ch) +int gs_put_char(struct tty_struct * tty, unsigned char ch) { struct gs_port *port; func_enter (); - if (!tty) return; + if (!tty) return 0; port = tty->driver_data; - if (!port) return; + if (!port) return 0; - if (! (port->flags & ASYNC_INITIALIZED)) return; + if (! (port->flags & ASYNC_INITIALIZED)) return 0; /* Take a lock on the serial tranmit buffer! */ mutex_lock(& port->port_write_mutex); @@ -68,7 +68,7 @@ void gs_put_char(struct tty_struct * tty, unsigned char ch) if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) { /* Sorry, buffer is full, drop character. Update statistics???? -- REW */ mutex_unlock(&port->port_write_mutex); - return; + return 0; } port->xmit_buf[port->xmit_head++] = ch; @@ -77,6 +77,7 @@ void gs_put_char(struct tty_struct * tty, unsigned char ch) mutex_unlock(&port->port_write_mutex); func_exit (); + return 1; } diff --git a/include/linux/generic_serial.h b/include/linux/generic_serial.h index 5412da28fa..110833666e 100644 --- a/include/linux/generic_serial.h +++ b/include/linux/generic_serial.h @@ -78,7 +78,7 @@ struct gs_port { #define GS_DEBUG_WRITE 0x00000040 #ifdef __KERNEL__ -void gs_put_char(struct tty_struct *tty, unsigned char ch); +int gs_put_char(struct tty_struct *tty, unsigned char ch); int gs_write(struct tty_struct *tty, const unsigned char *buf, int count); int gs_write_room(struct tty_struct *tty); -- 2.39.5