Messages in this thread Patch in this message | | | Date | Sun, 13 Apr 2008 18:11:53 +0100 | From | Alan Cox <> | Subject | [PATCH] char: switch gs, cyclades and esp to return int for put_char |
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Signed-off-by: Alan Cox <alan@redhat.com>
diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.25-rc8-mm2/drivers/char/cyclades.c linux-2.6.25-rc8-mm2/drivers/char/cyclades.c --- linux.vanilla-2.6.25-rc8-mm2/drivers/char/cyclades.c 2008-04-13 15:36:53.000000000 +0100 +++ linux-2.6.25-rc8-mm2/drivers/char/cyclades.c 2008-04-13 15:40:58.000000000 +0100 @@ -2815,7 +2815,7 @@ * 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; @@ -2825,15 +2825,15 @@ #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; @@ -2842,6 +2842,7 @@ 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 -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.25-rc8-mm2/drivers/char/esp.c linux-2.6.25-rc8-mm2/drivers/char/esp.c --- linux.vanilla-2.6.25-rc8-mm2/drivers/char/esp.c 2008-04-13 15:36:53.000000000 +0100 +++ linux-2.6.25-rc8-mm2/drivers/char/esp.c 2008-04-13 15:40:59.000000000 +0100 @@ -1156,24 +1156,27 @@ 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 -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.25-rc8-mm2/drivers/char/generic_serial.c linux-2.6.25-rc8-mm2/drivers/char/generic_serial.c --- linux.vanilla-2.6.25-rc8-mm2/drivers/char/generic_serial.c 2008-04-13 15:36:53.000000000 +0100 +++ linux-2.6.25-rc8-mm2/drivers/char/generic_serial.c 2008-04-13 15:41:06.000000000 +0100 @@ -49,19 +49,19 @@ 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); @@ -69,7 +69,7 @@ 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; @@ -78,6 +78,7 @@ mutex_unlock(&port->port_write_mutex); func_exit (); + return 1; } diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.25-rc8-mm2/include/linux/generic_serial.h linux-2.6.25-rc8-mm2/include/linux/generic_serial.h --- linux.vanilla-2.6.25-rc8-mm2/include/linux/generic_serial.h 2008-04-13 12:55:26.000000000 +0100 +++ linux-2.6.25-rc8-mm2/include/linux/generic_serial.h 2008-04-13 15:38:56.000000000 +0100 @@ -78,7 +78,7 @@ #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);
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