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ppdev: wrap ioctl handler in driver and push lock down 

Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alan Cox 2008-07-25 01:48:16 -07:00 committed by Linus Torvalds
parent e05e9f7c4a
commit 6d535d3e6a
1 changed files with 13 additions and 5 deletions
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18
drivers/char/ppdev.c
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@ -67,7 +67,7 @@
#include <linux/major.h>
#include <linux/ppdev.h>
#include <linux/smp_lock.h>
#include <asm/uaccess.h>
#include <linux/uaccess.h>
#define PP_VERSION "ppdev: user-space parallel port driver"
#define CHRDEV "ppdev"
@ -328,10 +328,9 @@ static enum ieee1284_phase init_phase (int mode)
return IEEE1284_PH_FWD_IDLE;
}
static int pp_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
static int pp_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
unsigned int minor = iminor(inode);
unsigned int minor = iminor(file->f_path.dentry->d_inode);
struct pp_struct *pp = file->private_data;
struct parport * port;
void __user *argp = (void __user *)arg;
@ -634,6 +633,15 @@ static int pp_ioctl(struct inode *inode, struct file *file,
return 0;
}
static long pp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
long ret;
lock_kernel();
ret = pp_do_ioctl(file, cmd, arg);
unlock_kernel();
return ret;
}
static int pp_open (struct inode * inode, struct file * file)
{
unsigned int minor = iminor(inode);
@ -745,7 +753,7 @@ static const struct file_operations pp_fops = {
.read = pp_read,
.write = pp_write,
.poll = pp_poll,
.ioctl = pp_ioctl,
.unlocked_ioctl = pp_ioctl,
.open = pp_open,
.release = pp_release,
};