Char: mxser, ioctl cleanup
- 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 <jirislaby@gmail.com>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c
index 4c756bb..e5029b1 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
* <alan@redhat.com>. 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 <linux/module.h>
@@ -1634,6 +1633,8 @@
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:
@@ -1804,7 +1805,6 @@
{
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;
@@ -1884,30 +1884,26 @@
* 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: