diff options
Diffstat (limited to 'drivers/isdn/hysdn/hysdn_procconf.c')
| -rw-r--r-- | drivers/isdn/hysdn/hysdn_procconf.c | 29 |
1 files changed, 8 insertions, 21 deletions
diff --git a/drivers/isdn/hysdn/hysdn_procconf.c b/drivers/isdn/hysdn/hysdn_procconf.c index 15906d005b05..484299b031f8 100644 --- a/drivers/isdn/hysdn/hysdn_procconf.c +++ b/drivers/isdn/hysdn/hysdn_procconf.c @@ -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 */ /*******************************************/ 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; - int i; - if (file->f_mode & FMODE_READ) { - if (!(cp = file->private_data)) - 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 (!(file->f_mode & FMODE_READ)) + return -EPERM; /* no permission to read */ + + if (!(cp = file->private_data)) + return -EFAULT; /* should never happen */ + + return simple_read_from_buffer(buf, count, off, cp, strlen(cp)); } /* hysdn_conf_read */ /******************/ |