[PATCH 04/13] proc tty: switch synclink_cs to ->proc_fops

[PATCH 04/13] proc tty: switch synclink_cs to ->proc_fops

[Alexey Dobriyan]

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
---

 drivers/char/pcmcia/synclink_cs.c |   80 ++++++++++++++++++--------------------
 1 file changed, 38 insertions(+), 42 deletions(-)

--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -2752,17 +2752,13 @@ cleanup:
 	return retval;
 }
 
-/*
- * /proc fs routines....
- */
-
-static inline int line_info(char *buf, MGSLPC_INFO *info)
+#ifdef CONFIG_PROC_FS
+static inline int line_info(struct seq_file *m, MGSLPC_INFO *info)
 {
 	char	stat_buf[30];
-	int	ret;
 	unsigned long flags;
 
-	ret = sprintf(buf, "%s:io:%04X irq:%d",
+	seq_printf(m, "%s:io:%04X irq:%d",
 		      info->device_name, info->io_base, info->irq_level);
 
 	/* output current serial signal states */
@@ -2786,75 +2782,73 @@ static inline int line_info(char *buf, MGSLPC_INFO *info)
 		strcat(stat_buf, "|RI");
 
 	if (info->params.mode == MGSL_MODE_HDLC) {
-		ret += sprintf(buf+ret, " HDLC txok:%d rxok:%d",
+		seq_printf(m, " HDLC txok:%d rxok:%d",
 			      info->icount.txok, info->icount.rxok);
 		if (info->icount.txunder)
-			ret += sprintf(buf+ret, " txunder:%d", info->icount.txunder);
+			seq_printf(m, " txunder:%d", info->icount.txunder);
 		if (info->icount.txabort)
-			ret += sprintf(buf+ret, " txabort:%d", info->icount.txabort);
+			seq_printf(m, " txabort:%d", info->icount.txabort);
 		if (info->icount.rxshort)
-			ret += sprintf(buf+ret, " rxshort:%d", info->icount.rxshort);
+			seq_printf(m, " rxshort:%d", info->icount.rxshort);
 		if (info->icount.rxlong)
-			ret += sprintf(buf+ret, " rxlong:%d", info->icount.rxlong);
+			seq_printf(m, " rxlong:%d", info->icount.rxlong);
 		if (info->icount.rxover)
-			ret += sprintf(buf+ret, " rxover:%d", info->icount.rxover);
+			seq_printf(m, " rxover:%d", info->icount.rxover);
 		if (info->icount.rxcrc)
-			ret += sprintf(buf+ret, " rxcrc:%d", info->icount.rxcrc);
+			seq_printf(m, " rxcrc:%d", info->icount.rxcrc);
 	} else {
-		ret += sprintf(buf+ret, " ASYNC tx:%d rx:%d",
+		seq_printf(m, " ASYNC tx:%d rx:%d",
 			      info->icount.tx, info->icount.rx);
 		if (info->icount.frame)
-			ret += sprintf(buf+ret, " fe:%d", info->icount.frame);
+			seq_printf(m, " fe:%d", info->icount.frame);
 		if (info->icount.parity)
-			ret += sprintf(buf+ret, " pe:%d", info->icount.parity);
+			seq_printf(m, " pe:%d", info->icount.parity);
 		if (info->icount.brk)
-			ret += sprintf(buf+ret, " brk:%d", info->icount.brk);
+			seq_printf(m, " brk:%d", info->icount.brk);
 		if (info->icount.overrun)
-			ret += sprintf(buf+ret, " oe:%d", info->icount.overrun);
+			seq_printf(m, " oe:%d", info->icount.overrun);
 	}
 
 	/* Append serial signal status to end */
-	ret += sprintf(buf+ret, " %s\n", stat_buf+1);
+	seq_printf(m, " %s\n", stat_buf+1);
 
-	ret += sprintf(buf+ret, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
+	seq_printf(m, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
 		       info->tx_active,info->bh_requested,info->bh_running,
 		       info->pending_bh);
 
-	return ret;
+	return 0;
 }
 
 /* Called to print information about devices
  */
-static int mgslpc_read_proc(char *page, char **start, off_t off, int count,
-		 int *eof, void *data)
+static int mgslpc_proc_show(struct seq_file *m, void *v)
 {
-	int len = 0, l;
-	off_t	begin = 0;
 	MGSLPC_INFO *info;
 
-	len += sprintf(page, "synclink driver:%s\n", driver_version);
+	seq_printf(m, "synclink driver:%s\n", driver_version);
 
 	info = mgslpc_device_list;
 	while( info ) {
-		l = line_info(page + len, info);
-		len += l;
-		if (len+begin > off+count)
-			goto done;
-		if (len+begin < off) {
-			begin += len;
-			len = 0;
-		}
+		line_info(m, info);
 		info = info->next_device;
 	}
+	return 0;
+}
 
-	*eof = 1;
-done:
-	if (off >= len+begin)
-		return 0;
-	*start = page + (off-begin);
-	return ((count < begin+len-off) ? count : begin+len-off);
+static int mgslpc_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, mgslpc_proc_show, NULL);
 }
 
+static const struct file_operations mgslpc_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= mgslpc_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+#endif
+
 static int rx_alloc_buffers(MGSLPC_INFO *info)
 {
 	/* each buffer has header and data */
@@ -2999,7 +2993,9 @@ static const struct tty_operations mgslpc_ops = {
 	.send_xchar = mgslpc_send_xchar,
 	.break_ctl = mgslpc_break,
 	.wait_until_sent = mgslpc_wait_until_sent,
-	.read_proc = mgslpc_read_proc,
+#ifdef CONFIG_PROC_FS
+	.proc_fops = &mgslpc_proc_fops,
+#endif
 	.set_termios = mgslpc_set_termios,
 	.stop = tx_pause,
 	.start = tx_release,
-- 
1.5.4.5