Commit 1a4b8feb authored by Al Viro's avatar Al Viro
Browse files

n_hdlc_tty_read(): remove pointless access_ok() 



only copy_to_user() is done to the address in question

Reviewed-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 00fca6b5

drivers/tty/n_hdlc.c

+0 −7
Original line number Diff line number Diff line
@@ -423,13 +423,6 @@ static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file, 
	struct n_hdlc_buf *rbuf;

	DECLARE_WAITQUEUE(wait, current);



	/* verify user access to buffer */

	if (!access_ok(buf, nr)) {

		pr_warn("%s(%d) %s() can't verify user buffer\n",

				__FILE__, __LINE__, __func__);

		return -EFAULT;

	}



	add_wait_queue(&tty->read_wait, &wait);



	for (;;) {