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isdn: use simple_read_from_buffer()

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Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Karsten Keil <kkeil@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Akinobu Mita 2008-06-10 12:50:14 -07:00 committed by David S. Miller
parent 495b36b15e
commit ea23ec2672
1 changed files with 7 additions and 20 deletions
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27
drivers/isdn/hysdn/hysdn_procconf.c
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@ -207,30 +207,17 @@ hysdn_conf_write(struct file *file, const char __user *buf, size_t count, loff_t
/* read conf file -> output card info data */ /* read conf file -> output card info data */
/*******************************************/ /*******************************************/
static ssize_t static ssize_t
hysdn_conf_read(struct file *file, char __user *buf, size_t count, loff_t * off) hysdn_conf_read(struct file *file, char __user *buf, size_t count, loff_t *off)
{ {
char *cp; char *cp;
int i;
if (file->f_mode & FMODE_READ) { if (!(file->f_mode & FMODE_READ))
if (!(cp = file->private_data)) return -EPERM; /* no permission to read */
return (-EFAULT); /* should never happen */
i = strlen(cp); /* get total string length */
if (*off < i) {
/* still bytes to transfer */
cp += *off; /* point to desired data offset */
i -= *off; /* remaining length */
if (i > count)
i = count; /* limit length to transfer */
if (copy_to_user(buf, cp, i))
return (-EFAULT); /* copy error */
*off += i; /* adjust offset */
} else
return (0);
} else
return (-EPERM); /* no permission to read */
return (i); if (!(cp = file->private_data))
return -EFAULT; /* should never happen */
return simple_read_from_buffer(buf, count, off, cp, strlen(cp));
} /* hysdn_conf_read */ } /* hysdn_conf_read */
/******************/ /******************/