From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760045AbYFIKKL (ORCPT ); Mon, 9 Jun 2008 06:10:11 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759925AbYFIKJ4 (ORCPT ); Mon, 9 Jun 2008 06:09:56 -0400 Received: from smtp.wellnetcz.com ([212.24.148.102]:55312 "EHLO WNmonitoring" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1758695AbYFIKJz (ORCPT ); Mon, 9 Jun 2008 06:09:55 -0400 From: Jiri Slaby To: Andrew Morton Cc: linux-kernel@vger.kernel.org, Jiri Slaby Subject: [PATCH] Char: mxser, ioctl cleanup Date: Mon, 9 Jun 2008 12:08:26 +0200 Message-Id: <1213006112-25965-1-git-send-email-jirislaby@gmail.com> X-Mailer: git-send-email 1.5.4.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org - remove break ctl from ioctl handler, it's never reached, since tty_ops->break_ctl is defined (mxser break handling is done in software) - mark MOXA_GET_MAJOR as deprecated - fix TIOCGICOUNT (some retval non-checks of put_user). Use copy_to_user to whole structure instead. Signed-off-by: Jiri Slaby --- drivers/char/mxser.c | 78 ++++++++++++------------------------------------- 1 files changed, 19 insertions(+), 59 deletions(-) diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c index 4b81a85..644202c 100644 --- a/drivers/char/mxser.c +++ b/drivers/char/mxser.c @@ -16,7 +16,6 @@ * Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox * . The original 1.8 code is available on www.moxa.com. * - Fixed x86_64 cleanness - * - Fixed sleep with spinlock held in mxser_send_break */ #include @@ -1473,27 +1472,6 @@ static int mxser_get_lsr_info(struct mxser_port *info, return put_user(result, value); } -/* - * This routine sends a break character out the serial port. - */ -static void mxser_send_break(struct mxser_port *info, int duration) -{ - unsigned long flags; - - if (!info->ioaddr) - return; - set_current_state(TASK_INTERRUPTIBLE); - spin_lock_irqsave(&info->slock, flags); - outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC, - info->ioaddr + UART_LCR); - spin_unlock_irqrestore(&info->slock, flags); - schedule_timeout(duration); - spin_lock_irqsave(&info->slock, flags); - outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC, - info->ioaddr + UART_LCR); - spin_unlock_irqrestore(&info->slock, flags); -} - static int mxser_tiocmget(struct tty_struct *tty, struct file *file) { struct mxser_port *info = tty->driver_data; @@ -1662,6 +1640,8 @@ static int mxser_ioctl_special(unsigned int cmd, void __user *argp) switch (cmd) { case MOXA_GET_MAJOR: + printk(KERN_WARNING "mxser: '%s' uses deprecated ioctl %x, fix " + "your userspace\n", current->comm, cmd); return put_user(ttymajor, (int __user *)argp); case MOXA_CHKPORTENABLE: @@ -1832,7 +1812,6 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file, { struct mxser_port *info = tty->driver_data; struct async_icount cnow; - struct serial_icounter_struct __user *p_cuser; unsigned long flags; void __user *argp = (void __user *)arg; int retval; @@ -1881,21 +1860,6 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file, return -EIO; switch (cmd) { - case TCSBRK: /* SVID version: non-zero arg --> no break */ - retval = tty_check_change(tty); - if (retval) - return retval; - tty_wait_until_sent(tty, 0); - if (!arg) - mxser_send_break(info, HZ / 4); /* 1/4 second */ - return 0; - case TCSBRKP: /* support for POSIX tcsendbreak() */ - retval = tty_check_change(tty); - if (retval) - return retval; - tty_wait_until_sent(tty, 0); - mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4); - return 0; case TIOCGSERIAL: lock_kernel(); retval = mxser_get_serial_info(info, argp); @@ -1927,30 +1891,26 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file, * NB: both 1->0 and 0->1 transitions are counted except for * RI where only 0->1 is counted. */ - case TIOCGICOUNT: + case TIOCGICOUNT: { + struct serial_icounter_struct icnt = { 0 }; spin_lock_irqsave(&info->slock, flags); cnow = info->icount; spin_unlock_irqrestore(&info->slock, flags); - p_cuser = argp; - if (put_user(cnow.frame, &p_cuser->frame)) - return -EFAULT; - if (put_user(cnow.brk, &p_cuser->brk)) - return -EFAULT; - if (put_user(cnow.overrun, &p_cuser->overrun)) - return -EFAULT; - if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun)) - return -EFAULT; - if (put_user(cnow.parity, &p_cuser->parity)) - return -EFAULT; - if (put_user(cnow.rx, &p_cuser->rx)) - return -EFAULT; - if (put_user(cnow.tx, &p_cuser->tx)) - return -EFAULT; - put_user(cnow.cts, &p_cuser->cts); - put_user(cnow.dsr, &p_cuser->dsr); - put_user(cnow.rng, &p_cuser->rng); - put_user(cnow.dcd, &p_cuser->dcd); - return 0; + + icnt.frame = cnow.frame; + icnt.brk = cnow.brk; + icnt.overrun = cnow.overrun; + icnt.buf_overrun = cnow.buf_overrun; + icnt.parity = cnow.parity; + icnt.rx = cnow.rx; + icnt.tx = cnow.tx; + icnt.cts = cnow.cts; + icnt.dsr = cnow.dsr; + icnt.rng = cnow.rng; + icnt.dcd = cnow.dcd; + + return copy_to_user(argp, &icnt, sizeof(icnt)) ? -EFAULT : 0; + } case MOXA_HighSpeedOn: return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp); case MOXA_SDS_RSTICOUNTER: -- 1.5.4.5