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Char: mxser, ioctl cleanup

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- remove dead MOXA_GET_CONF (always returned -ENXIO)
- remove useless MOXA_GET_CUMAJOR (unused)
- use get/put_user instead of copy_from/to_user for simple types
- cleanup TIOCMIWAIT -- return -ERESTARTSYS on signal, move condition into
  separate function

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Reviewed-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jiri Slaby 2008-02-07 00:16:45 -08:00 committed by Linus Torvalds
parent f83bb2d40a
commit f122bfb5a4
2 changed files with 31 additions and 45 deletions
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74
drivers/char/mxser_new.c
View File

@ -175,7 +175,6 @@ MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
static int ttymajor = MXSERMAJOR;
static int calloutmajor = MXSERCUMAJOR;
/* Variables for insmod */
@ -1454,21 +1453,8 @@ static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
unsigned int i, j;
switch (cmd) {
case MOXA_GET_CONF:
/* if (copy_to_user(argp, mxsercfg,
sizeof(struct mxser_hwconf) * 4))
return -EFAULT;
return 0;*/
return -ENXIO;
case MOXA_GET_MAJOR:
if (copy_to_user(argp, &ttymajor, sizeof(int)))
return -EFAULT;
return 0;
case MOXA_GET_CUMAJOR:
if (copy_to_user(argp, &calloutmajor, sizeof(int)))
return -EFAULT;
return 0;
return put_user(ttymajor, (int __user *)argp);
case MOXA_CHKPORTENABLE:
result = 0;
@ -1606,13 +1592,33 @@ static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
return 0;
}
static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
struct async_icount *cprev)
{
struct async_icount cnow;
unsigned long flags;
int ret;
spin_lock_irqsave(&info->slock, flags);
cnow = info->icount; /* atomic copy */
spin_unlock_irqrestore(&info->slock, flags);
ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
*cprev = cnow;
return ret;
}
static int mxser_ioctl(struct tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct mxser_port *info = tty->driver_data;
struct async_icount cprev, cnow; /* kernel counter temps */
struct async_icount cnow;
struct serial_icounter_struct __user *p_cuser;
unsigned long templ;
unsigned long flags;
void __user *argp = (void __user *)arg;
int retval;
@ -1646,7 +1652,7 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file,
shiftbit = p * 2;
opmode = inb(info->opmode_ioaddr) >> shiftbit;
opmode &= OP_MODE_MASK;
if (copy_to_user(argp, &opmode, sizeof(int)))
if (put_user(opmode, (int __user *)argp))
return -EFAULT;
}
return 0;
@ -1673,11 +1679,10 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file,
mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
return 0;
case TIOCGSOFTCAR:
return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
return put_user(!!C_CLOCAL(tty), (unsigned long __user *)argp);
case TIOCSSOFTCAR:
if (get_user(templ, (unsigned long __user *) argp))
if (get_user(arg, (unsigned long __user *)argp))
return -EFAULT;
arg = templ;
tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
return 0;
case TIOCGSERIAL:
@ -1697,18 +1702,8 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file,
cnow = info->icount; /* note the counters on entry */
spin_unlock_irqrestore(&info->slock, flags);
wait_event_interruptible(info->delta_msr_wait, ({
cprev = cnow;
spin_lock_irqsave(&info->slock, flags);
cnow = info->icount; /* atomic copy */
spin_unlock_irqrestore(&info->slock, flags);
((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
}));
break;
return wait_event_interruptible(info->delta_msr_wait,
mxser_cflags_changed(info, arg, &cnow));
/*
* Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
* Return: write counters to the user passed counter struct
@ -1755,10 +1750,7 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file,
len += (lsr ? 0 : 1);
if (copy_to_user(argp, &len, sizeof(int)))
return -EFAULT;
return 0;
return put_user(len, (int __user *)argp);
}
case MOXA_ASPP_MON: {
int mcr, status;
@ -1789,8 +1781,7 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file,
return 0;
}
case MOXA_ASPP_LSTATUS: {
if (copy_to_user(argp, &info->err_shadow,
sizeof(unsigned char)))
if (put_user(info->err_shadow, (unsigned char __user *)argp))
return -EFAULT;
info->err_shadow = 0;
@ -1802,10 +1793,7 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file,
if (get_user(method, (int __user *)argp))
return -EFAULT;
mxser_set_baud_method[tty->index] = method;
if (copy_to_user(argp, &method, sizeof(int)))
return -EFAULT;
return 0;
return put_user(method, (int __user *)argp);
}
default:
return -ENOIOCTLCMD;

2
drivers/char/mxser_new.h
View File

@ -11,12 +11,10 @@
#define MOXA 0x400
#define MOXA_GETDATACOUNT (MOXA + 23)
#define MOXA_GET_CONF (MOXA + 35)
#define MOXA_DIAGNOSE (MOXA + 50)
#define MOXA_CHKPORTENABLE (MOXA + 60)
#define MOXA_HighSpeedOn (MOXA + 61)
#define MOXA_GET_MAJOR (MOXA + 63)
#define MOXA_GET_CUMAJOR (MOXA + 64)
#define MOXA_GETMSTATUS (MOXA + 65)
#define MOXA_SET_OP_MODE (MOXA + 66)
#define MOXA_GET_OP_MODE (MOXA + 67)