diff options
Diffstat (limited to 'drivers/char/synclink_gt.c')
| -rw-r--r-- | drivers/char/synclink_gt.c | 80 |
1 files changed, 53 insertions, 27 deletions
diff --git a/drivers/char/synclink_gt.c b/drivers/char/synclink_gt.c index f3d8d72e5ea..2001b0e52dc 100644 --- a/drivers/char/synclink_gt.c +++ b/drivers/char/synclink_gt.c @@ -151,7 +151,7 @@ static void hangup(struct tty_struct *tty); static void set_termios(struct tty_struct *tty, struct ktermios *old_termios); static int write(struct tty_struct *tty, const unsigned char *buf, int count); -static void put_char(struct tty_struct *tty, unsigned char ch); +static int put_char(struct tty_struct *tty, unsigned char ch); static void send_xchar(struct tty_struct *tty, char ch); static void wait_until_sent(struct tty_struct *tty, int timeout); static int write_room(struct tty_struct *tty); @@ -771,8 +771,7 @@ static void close(struct tty_struct *tty, struct file *filp) if (info->flags & ASYNC_INITIALIZED) wait_until_sent(tty, info->timeout); - if (tty->driver->flush_buffer) - tty->driver->flush_buffer(tty); + flush_buffer(tty); tty_ldisc_flush(tty); shutdown(info); @@ -913,20 +912,24 @@ cleanup: return ret; } -static void put_char(struct tty_struct *tty, unsigned char ch) +static int put_char(struct tty_struct *tty, unsigned char ch) { struct slgt_info *info = tty->driver_data; unsigned long flags; + int ret; if (sanity_check(info, tty->name, "put_char")) - return; + return 0; DBGINFO(("%s put_char(%d)\n", info->device_name, ch)); if (!info->tx_buf) - return; + return 0; spin_lock_irqsave(&info->lock,flags); - if (!info->tx_active && (info->tx_count < info->max_frame_size)) + if (!info->tx_active && (info->tx_count < info->max_frame_size)) { info->tx_buf[info->tx_count++] = ch; + ret = 1; + } spin_unlock_irqrestore(&info->lock,flags); + return ret; } static void send_xchar(struct tty_struct *tty, char ch) @@ -967,6 +970,8 @@ static void wait_until_sent(struct tty_struct *tty, int timeout) * Note: use tight timings here to satisfy the NIST-PCTS. */ + lock_kernel(); + if (info->params.data_rate) { char_time = info->timeout/(32 * 5); if (!char_time) @@ -984,6 +989,7 @@ static void wait_until_sent(struct tty_struct *tty, int timeout) if (timeout && time_after(jiffies, orig_jiffies + timeout)) break; } + unlock_kernel(); exit: DBGINFO(("%s wait_until_sent exit\n", info->device_name)); @@ -1097,6 +1103,7 @@ static int ioctl(struct tty_struct *tty, struct file *file, struct serial_icounter_struct __user *p_cuser; /* user space */ unsigned long flags; void __user *argp = (void __user *)arg; + int ret; if (sanity_check(info, tty->name, "ioctl")) return -ENODEV; @@ -1108,37 +1115,54 @@ static int ioctl(struct tty_struct *tty, struct file *file, return -EIO; } + lock_kernel(); + switch (cmd) { case MGSL_IOCGPARAMS: - return get_params(info, argp); + ret = get_params(info, argp); + break; case MGSL_IOCSPARAMS: - return set_params(info, argp); + ret = set_params(info, argp); + break; case MGSL_IOCGTXIDLE: - return get_txidle(info, argp); + ret = get_txidle(info, argp); + break; case MGSL_IOCSTXIDLE: - return set_txidle(info, (int)arg); + ret = set_txidle(info, (int)arg); + break; case MGSL_IOCTXENABLE: - return tx_enable(info, (int)arg); + ret = tx_enable(info, (int)arg); + break; case MGSL_IOCRXENABLE: - return rx_enable(info, (int)arg); + ret = rx_enable(info, (int)arg); + break; case MGSL_IOCTXABORT: - return tx_abort(info); + ret = tx_abort(info); + break; case MGSL_IOCGSTATS: - return get_stats(info, argp); + ret = get_stats(info, argp); + break; case MGSL_IOCWAITEVENT: - return wait_mgsl_event(info, argp); + ret = wait_mgsl_event(info, argp); + break; case TIOCMIWAIT: - return modem_input_wait(info,(int)arg); + ret = modem_input_wait(info,(int)arg); + break; case MGSL_IOCGIF: - return get_interface(info, argp); + ret = get_interface(info, argp); + break; case MGSL_IOCSIF: - return set_interface(info,(int)arg); + ret = set_interface(info,(int)arg); + break; case MGSL_IOCSGPIO: - return set_gpio(info, argp); + ret = set_gpio(info, argp); + break; case MGSL_IOCGGPIO: - return get_gpio(info, argp); + ret = get_gpio(info, argp); + break; case MGSL_IOCWAITGPIO: - return wait_gpio(info, argp); + ret = wait_gpio(info, argp); + break; case TIOCGICOUNT: spin_lock_irqsave(&info->lock,flags); cnow = info->icount; @@ -1155,12 +1179,14 @@ static int ioctl(struct tty_struct *tty, struct file *file, put_user(cnow.parity, &p_cuser->parity) || put_user(cnow.brk, &p_cuser->brk) || put_user(cnow.buf_overrun, &p_cuser->buf_overrun)) - return -EFAULT; - return 0; + ret = -EFAULT; + ret = 0; + break; default: - return -ENOIOCTLCMD; + ret = -ENOIOCTLCMD; } - return 0; + unlock_kernel(); + return ret; } /* @@ -3324,7 +3350,7 @@ static int claim_resources(struct slgt_info *info) else info->reg_addr_requested = true; - info->reg_addr = ioremap(info->phys_reg_addr, SLGT_REG_SIZE); + info->reg_addr = ioremap_nocache(info->phys_reg_addr, SLGT_REG_SIZE); if (!info->reg_addr) { DBGERR(("%s cant map device registers, addr=%08X\n", info->device_name, info->phys_reg_addr)); |