[patch -v3 08/22] usbmon: use simple_read_from_buffer

[Akinobu Mita <akinobu.mita@gmail.com>]

[-- Attachment #1: mon-use-simple-read-from-buffer.patch --]
[-- Type: text/plain, Size: 1090 bytes --]

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Greg Kroah-Hartman <greg@kroah.com>
---
 drivers/usb/mon/mon_stat.c |   14 ++------------
 1 file changed, 2 insertions(+), 12 deletions(-)

Index: 2.6-git/drivers/usb/mon/mon_stat.c
===================================================================
--- 2.6-git.orig/drivers/usb/mon/mon_stat.c
+++ 2.6-git/drivers/usb/mon/mon_stat.c
@@ -9,6 +9,7 @@
 
 #include <linux/kernel.h>
 #include <linux/usb.h>
+#include <linux/fs.h>
 #include <asm/uaccess.h>
 
 #include "usb_mon.h"
@@ -42,19 +43,8 @@ static ssize_t mon_stat_read(struct file
 				size_t nbytes, loff_t *ppos)
 {
 	struct snap *sp = file->private_data;
-	loff_t pos = *ppos;
-	int cnt;
 
-	if (pos < 0 || pos >= sp->slen)
-		return 0;
-	if (nbytes == 0)
-		return 0;
-	if ((cnt = sp->slen - pos) > nbytes)
-		cnt = nbytes;
-	if (copy_to_user(buf, sp->str + pos, cnt))
-		return -EFAULT;
-	*ppos = pos + cnt;
-	return cnt;
+	return simple_read_from_buffer(buf, nbytes, ppos, sp->str, sp->slen);
 }
 
 static int mon_stat_release(struct inode *inode, struct file *file)

--