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Date: Sun, 13 Apr 2008 18:20:07 +0100
From: Alan Cox <alan@...rguk.ukuu.org.uk>
To: akpm@...l.org, linux-kernel@...r.kernel.org, paulkf@...rogate.com
Subject: [PATCH] synclink series: switch to int put_char method
Signed-off-by: Alan Cox <alan@...hat.com>
diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.25-rc8-mm2/drivers/char/synclink.c linux-2.6.25-rc8-mm2/drivers/char/synclink.c
--- linux.vanilla-2.6.25-rc8-mm2/drivers/char/synclink.c 2008-04-13 15:36:53.000000000 +0100
+++ linux-2.6.25-rc8-mm2/drivers/char/synclink.c 2008-04-13 15:41:05.000000000 +0100
@@ -2029,10 +2029,11 @@
*
* Return Value: None
*/
-static void mgsl_put_char(struct tty_struct *tty, unsigned char ch)
+static int mgsl_put_char(struct tty_struct *tty, unsigned char ch)
{
struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
unsigned long flags;
+ int ret;
if ( debug_level >= DEBUG_LEVEL_INFO ) {
printk( "%s(%d):mgsl_put_char(%d) on %s\n",
@@ -2040,23 +2041,23 @@
}
if (mgsl_paranoia_check(info, tty->name, "mgsl_put_char"))
- return;
+ return 0;
if (!tty || !info->xmit_buf)
- return;
+ return 0;
spin_lock_irqsave(&info->irq_spinlock,flags);
if ( (info->params.mode == MGSL_MODE_ASYNC ) || !info->tx_active ) {
-
if (info->xmit_cnt < SERIAL_XMIT_SIZE - 1) {
info->xmit_buf[info->xmit_head++] = ch;
info->xmit_head &= SERIAL_XMIT_SIZE-1;
info->xmit_cnt++;
+ ret = 1;
}
}
-
spin_unlock_irqrestore(&info->irq_spinlock,flags);
+ return ret;
} /* end of mgsl_put_char() */
diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.25-rc8-mm2/drivers/char/synclink_gt.c linux-2.6.25-rc8-mm2/drivers/char/synclink_gt.c
--- linux.vanilla-2.6.25-rc8-mm2/drivers/char/synclink_gt.c 2008-04-13 15:36:53.000000000 +0100
+++ linux-2.6.25-rc8-mm2/drivers/char/synclink_gt.c 2008-04-13 15:40:58.000000000 +0100
@@ -151,7 +151,7 @@
static void set_termios(struct tty_struct *tty, struct ktermios *old_termios);
static int write(struct tty_struct *tty, const unsigned char *buf, int count);
-static void put_char(struct tty_struct *tty, unsigned char ch);
+static int put_char(struct tty_struct *tty, unsigned char ch);
static void send_xchar(struct tty_struct *tty, char ch);
static void wait_until_sent(struct tty_struct *tty, int timeout);
static int write_room(struct tty_struct *tty);
@@ -913,20 +913,24 @@
return ret;
}
-static void put_char(struct tty_struct *tty, unsigned char ch)
+static int put_char(struct tty_struct *tty, unsigned char ch)
{
struct slgt_info *info = tty->driver_data;
unsigned long flags;
+ int ret;
if (sanity_check(info, tty->name, "put_char"))
- return;
+ return 0;
DBGINFO(("%s put_char(%d)\n", info->device_name, ch));
if (!info->tx_buf)
- return;
+ return 0;
spin_lock_irqsave(&info->lock,flags);
- if (!info->tx_active && (info->tx_count < info->max_frame_size))
+ if (!info->tx_active && (info->tx_count < info->max_frame_size)) {
info->tx_buf[info->tx_count++] = ch;
+ ret = 1;
+ }
spin_unlock_irqrestore(&info->lock,flags);
+ return ret;
}
static void send_xchar(struct tty_struct *tty, char ch)
diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.25-rc8-mm2/drivers/char/synclinkmp.c linux-2.6.25-rc8-mm2/drivers/char/synclinkmp.c
--- linux.vanilla-2.6.25-rc8-mm2/drivers/char/synclinkmp.c 2008-04-13 15:36:53.000000000 +0100
+++ linux-2.6.25-rc8-mm2/drivers/char/synclinkmp.c 2008-04-13 15:40:58.000000000 +0100
@@ -519,7 +519,7 @@
static void set_termios(struct tty_struct *tty, struct ktermios *old_termios);
static int write(struct tty_struct *tty, const unsigned char *buf, int count);
-static void put_char(struct tty_struct *tty, unsigned char ch);
+static int put_char(struct tty_struct *tty, unsigned char ch);
static void send_xchar(struct tty_struct *tty, char ch);
static void wait_until_sent(struct tty_struct *tty, int timeout);
static int write_room(struct tty_struct *tty);
@@ -1045,10 +1045,11 @@
/* Add a character to the transmit buffer.
*/
-static void put_char(struct tty_struct *tty, unsigned char ch)
+static int put_char(struct tty_struct *tty, unsigned char ch)
{
SLMP_INFO *info = (SLMP_INFO *)tty->driver_data;
unsigned long flags;
+ int ret = 0;
if ( debug_level >= DEBUG_LEVEL_INFO ) {
printk( "%s(%d):%s put_char(%d)\n",
@@ -1056,10 +1057,10 @@
}
if (sanity_check(info, tty->name, "put_char"))
- return;
+ return 0;
if (!info->tx_buf)
- return;
+ return 0;
spin_lock_irqsave(&info->lock,flags);
@@ -1071,10 +1072,12 @@
if (info->tx_put >= info->max_frame_size)
info->tx_put -= info->max_frame_size;
info->tx_count++;
+ ret = 1;
}
}
spin_unlock_irqrestore(&info->lock,flags);
+ return ret;
}
/* Send a high-priority XON/XOFF character
--
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