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Message-ID: <20080729020533.GK3135@martell.zuzino.mipt.ru>
Date: Tue, 29 Jul 2008 06:05:33 +0400
From: Alexey Dobriyan <adobriyan@...il.com>
To: akpm@...l.org, alan@...rguk.ukuu.org.uk
Cc: linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: [PATCH 11/13] proc tty: switch usb_serial to ->proc_fops
Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---
drivers/usb/serial/usb-serial.c | 63 +++++++++++++++++++---------------------
1 file changed, 31 insertions(+), 32 deletions(-)
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -26,6 +26,7 @@
#include <linux/tty_flip.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
+#include <linux/seq_file.h>
#include <linux/spinlock.h>
#include <linux/mutex.h>
#include <linux/list.h>
@@ -412,57 +413,53 @@ static int serial_break(struct tty_struct *tty, int break_state)
return 0;
}
-static int serial_read_proc(char *page, char **start, off_t off, int count,
- int *eof, void *data)
+#ifdef CONFIG_PROC_FS
+static int usb_serial_proc_show(struct seq_file *m, void *v)
{
struct usb_serial *serial;
- int length = 0;
int i;
- off_t begin = 0;
char tmp[40];
dbg("%s", __func__);
- length += sprintf(page, "usbserinfo:1.0 driver:2.0\n");
- for (i = 0; i < SERIAL_TTY_MINORS && length < PAGE_SIZE; ++i) {
+ seq_printf(m, "usbserinfo:1.0 driver:2.0\n");
+ for (i = 0; i < SERIAL_TTY_MINORS; ++i) {
serial = usb_serial_get_by_index(i);
if (serial == NULL)
continue;
- length += sprintf(page+length, "%d:", i);
+ seq_printf(m, "%d:", i);
if (serial->type->driver.owner)
- length += sprintf(page+length, " module:%s",
+ seq_printf(m, " module:%s",
module_name(serial->type->driver.owner));
- length += sprintf(page+length, " name:\"%s\"",
- serial->type->description);
- length += sprintf(page+length, " vendor:%04x product:%04x",
+ seq_printf(m, " name:\"%s\"", serial->type->description);
+ seq_printf(m, " vendor:%04x product:%04x",
le16_to_cpu(serial->dev->descriptor.idVendor),
le16_to_cpu(serial->dev->descriptor.idProduct));
- length += sprintf(page+length, " num_ports:%d",
- serial->num_ports);
- length += sprintf(page+length, " port:%d",
- i - serial->minor + 1);
+ seq_printf(m, " num_ports:%d", serial->num_ports);
+ seq_printf(m, " port:%d", i - serial->minor + 1);
usb_make_path(serial->dev, tmp, sizeof(tmp));
- length += sprintf(page+length, " path:%s", tmp);
+ seq_printf(m, " path:%s", tmp);
- length += sprintf(page+length, "\n");
- if ((length + begin) > (off + count)) {
- usb_serial_put(serial);
- goto done;
- }
- if ((length + begin) < off) {
- begin += length;
- length = 0;
- }
+ seq_putc(m, '\n');
usb_serial_put(serial);
}
- *eof = 1;
-done:
- if (off >= (length + begin))
- return 0;
- *start = page + (off-begin);
- return (count < begin+length-off) ? count : begin+length-off;
+ return 0;
}
+static int usb_serial_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, usb_serial_proc_show, NULL);
+}
+
+static const struct file_operations usb_serial_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = usb_serial_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+#endif
+
static int serial_tiocmget(struct tty_struct *tty, struct file *file)
{
struct usb_serial_port *port = tty->driver_data;
@@ -1092,7 +1089,9 @@ static const struct tty_operations serial_ops = {
.unthrottle = serial_unthrottle,
.break_ctl = serial_break,
.chars_in_buffer = serial_chars_in_buffer,
- .read_proc = serial_read_proc,
+#ifdef CONFIG_PROC_FS
+ .proc_fops = &usb_serial_proc_fops,
+#endif
.tiocmget = serial_tiocmget,
.tiocmset = serial_tiocmset,
};
--
1.5.4.5
--
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