Char: mxser, ioctl cleanup
- 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>
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@ -175,7 +175,6 @@ MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
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static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
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static int ttymajor = MXSERMAJOR;
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static int calloutmajor = MXSERCUMAJOR;
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/* Variables for insmod */
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@ -1454,21 +1453,8 @@ static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
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unsigned int i, j;
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switch (cmd) {
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case MOXA_GET_CONF:
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/* if (copy_to_user(argp, mxsercfg,
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sizeof(struct mxser_hwconf) * 4))
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return -EFAULT;
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return 0;*/
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return -ENXIO;
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case MOXA_GET_MAJOR:
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if (copy_to_user(argp, &ttymajor, sizeof(int)))
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return -EFAULT;
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return 0;
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case MOXA_GET_CUMAJOR:
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if (copy_to_user(argp, &calloutmajor, sizeof(int)))
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return -EFAULT;
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return 0;
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return put_user(ttymajor, (int __user *)argp);
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case MOXA_CHKPORTENABLE:
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result = 0;
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@ -1606,13 +1592,33 @@ static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
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return 0;
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}
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static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
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struct async_icount *cprev)
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{
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struct async_icount cnow;
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unsigned long flags;
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int ret;
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spin_lock_irqsave(&info->slock, flags);
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cnow = info->icount; /* atomic copy */
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spin_unlock_irqrestore(&info->slock, flags);
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ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
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((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
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((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
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((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
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*cprev = cnow;
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return ret;
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}
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static int mxser_ioctl(struct tty_struct *tty, struct file *file,
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unsigned int cmd, unsigned long arg)
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{
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struct mxser_port *info = tty->driver_data;
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struct async_icount cprev, cnow; /* kernel counter temps */
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struct async_icount cnow;
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struct serial_icounter_struct __user *p_cuser;
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unsigned long templ;
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unsigned long flags;
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void __user *argp = (void __user *)arg;
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int retval;
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@ -1646,7 +1652,7 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file,
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shiftbit = p * 2;
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opmode = inb(info->opmode_ioaddr) >> shiftbit;
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opmode &= OP_MODE_MASK;
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if (copy_to_user(argp, &opmode, sizeof(int)))
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if (put_user(opmode, (int __user *)argp))
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return -EFAULT;
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}
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return 0;
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@ -1673,11 +1679,10 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file,
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mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
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return 0;
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case TIOCGSOFTCAR:
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return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
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return put_user(!!C_CLOCAL(tty), (unsigned long __user *)argp);
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case TIOCSSOFTCAR:
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if (get_user(templ, (unsigned long __user *) argp))
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if (get_user(arg, (unsigned long __user *)argp))
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return -EFAULT;
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arg = templ;
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tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
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return 0;
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case TIOCGSERIAL:
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@ -1697,18 +1702,8 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file,
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cnow = info->icount; /* note the counters on entry */
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spin_unlock_irqrestore(&info->slock, flags);
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wait_event_interruptible(info->delta_msr_wait, ({
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cprev = cnow;
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spin_lock_irqsave(&info->slock, flags);
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cnow = info->icount; /* atomic copy */
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spin_unlock_irqrestore(&info->slock, flags);
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((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
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((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
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((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
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((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
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}));
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break;
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return wait_event_interruptible(info->delta_msr_wait,
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mxser_cflags_changed(info, arg, &cnow));
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/*
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* Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
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* Return: write counters to the user passed counter struct
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@ -1755,10 +1750,7 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file,
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len += (lsr ? 0 : 1);
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if (copy_to_user(argp, &len, sizeof(int)))
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return -EFAULT;
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return 0;
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return put_user(len, (int __user *)argp);
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}
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case MOXA_ASPP_MON: {
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int mcr, status;
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@ -1789,8 +1781,7 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file,
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return 0;
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}
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case MOXA_ASPP_LSTATUS: {
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if (copy_to_user(argp, &info->err_shadow,
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sizeof(unsigned char)))
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if (put_user(info->err_shadow, (unsigned char __user *)argp))
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return -EFAULT;
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info->err_shadow = 0;
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@ -1802,10 +1793,7 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file,
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if (get_user(method, (int __user *)argp))
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return -EFAULT;
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mxser_set_baud_method[tty->index] = method;
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if (copy_to_user(argp, &method, sizeof(int)))
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return -EFAULT;
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return 0;
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return put_user(method, (int __user *)argp);
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}
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default:
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return -ENOIOCTLCMD;
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@ -11,12 +11,10 @@
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#define MOXA 0x400
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#define MOXA_GETDATACOUNT (MOXA + 23)
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#define MOXA_GET_CONF (MOXA + 35)
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#define MOXA_DIAGNOSE (MOXA + 50)
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#define MOXA_CHKPORTENABLE (MOXA + 60)
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#define MOXA_HighSpeedOn (MOXA + 61)
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#define MOXA_GET_MAJOR (MOXA + 63)
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#define MOXA_GET_CUMAJOR (MOXA + 64)
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#define MOXA_GETMSTATUS (MOXA + 65)
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#define MOXA_SET_OP_MODE (MOXA + 66)
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#define MOXA_GET_OP_MODE (MOXA + 67)
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