diff options
| author | Paul Fulghum <paulkf@microgate.com> | 2007-05-11 07:22:43 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-11 17:29:34 +0200 |
| commit | 2acdb1694494eb6f17b44b2b3065879af32d0d46 (patch) | |
| tree | c9d53e5082ac8e2e80aa228c95102661e0822978 /drivers/char | |
| parent | small cleanup in gpt partition handling (diff) | |
| download | linux-2acdb1694494eb6f17b44b2b3065879af32d0d46.tar.xz linux-2acdb1694494eb6f17b44b2b3065879af32d0d46.zip | |
synclink_gt: add compat_ioctl
Add support for 32 bit ioctl on 64 bit systems for synclink_gt
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/synclink_gt.c | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/drivers/char/synclink_gt.c b/drivers/char/synclink_gt.c index 2a7736b5f2f7..02b49bc00028 100644 --- a/drivers/char/synclink_gt.c +++ b/drivers/char/synclink_gt.c @@ -1171,6 +1171,112 @@ static int ioctl(struct tty_struct *tty, struct file *file, } /* + * support for 32 bit ioctl calls on 64 bit systems + */ +#ifdef CONFIG_COMPAT +static long get_params32(struct slgt_info *info, struct MGSL_PARAMS32 __user *user_params) +{ + struct MGSL_PARAMS32 tmp_params; + + DBGINFO(("%s get_params32\n", info->device_name)); + tmp_params.mode = (compat_ulong_t)info->params.mode; + tmp_params.loopback = info->params.loopback; + tmp_params.flags = info->params.flags; + tmp_params.encoding = info->params.encoding; + tmp_params.clock_speed = (compat_ulong_t)info->params.clock_speed; + tmp_params.addr_filter = info->params.addr_filter; + tmp_params.crc_type = info->params.crc_type; + tmp_params.preamble_length = info->params.preamble_length; + tmp_params.preamble = info->params.preamble; + tmp_params.data_rate = (compat_ulong_t)info->params.data_rate; + tmp_params.data_bits = info->params.data_bits; + tmp_params.stop_bits = info->params.stop_bits; + tmp_params.parity = info->params.parity; + if (copy_to_user(user_params, &tmp_params, sizeof(struct MGSL_PARAMS32))) + return -EFAULT; + return 0; +} + +static long set_params32(struct slgt_info *info, struct MGSL_PARAMS32 __user *new_params) +{ + struct MGSL_PARAMS32 tmp_params; + + DBGINFO(("%s set_params32\n", info->device_name)); + if (copy_from_user(&tmp_params, new_params, sizeof(struct MGSL_PARAMS32))) + return -EFAULT; + + spin_lock(&info->lock); + info->params.mode = tmp_params.mode; + info->params.loopback = tmp_params.loopback; + info->params.flags = tmp_params.flags; + info->params.encoding = tmp_params.encoding; + info->params.clock_speed = tmp_params.clock_speed; + info->params.addr_filter = tmp_params.addr_filter; + info->params.crc_type = tmp_params.crc_type; + info->params.preamble_length = tmp_params.preamble_length; + info->params.preamble = tmp_params.preamble; + info->params.data_rate = tmp_params.data_rate; + info->params.data_bits = tmp_params.data_bits; + info->params.stop_bits = tmp_params.stop_bits; + info->params.parity = tmp_params.parity; + spin_unlock(&info->lock); + + change_params(info); + + return 0; +} + +static long slgt_compat_ioctl(struct tty_struct *tty, struct file *file, + unsigned int cmd, unsigned long arg) +{ + struct slgt_info *info = tty->driver_data; + int rc = -ENOIOCTLCMD; + + if (sanity_check(info, tty->name, "compat_ioctl")) + return -ENODEV; + DBGINFO(("%s compat_ioctl() cmd=%08X\n", info->device_name, cmd)); + + switch (cmd) { + + case MGSL_IOCSPARAMS32: + rc = set_params32(info, compat_ptr(arg)); + break; + + case MGSL_IOCGPARAMS32: + rc = get_params32(info, compat_ptr(arg)); + break; + + case MGSL_IOCGPARAMS: + case MGSL_IOCSPARAMS: + case MGSL_IOCGTXIDLE: + case MGSL_IOCGSTATS: + case MGSL_IOCWAITEVENT: + case MGSL_IOCGIF: + case MGSL_IOCSGPIO: + case MGSL_IOCGGPIO: + case MGSL_IOCWAITGPIO: + case TIOCGICOUNT: + rc = ioctl(tty, file, cmd, (unsigned long)(compat_ptr(arg))); + break; + + case MGSL_IOCSTXIDLE: + case MGSL_IOCTXENABLE: + case MGSL_IOCRXENABLE: + case MGSL_IOCTXABORT: + case TIOCMIWAIT: + case MGSL_IOCSIF: + rc = ioctl(tty, file, cmd, arg); + break; + } + + DBGINFO(("%s compat_ioctl() cmd=%08X rc=%d\n", info->device_name, cmd, rc)); + return rc; +} +#else +#define slgt_compat_ioctl NULL +#endif /* ifdef CONFIG_COMPAT */ + +/* * proc fs support */ static inline int line_info(char *buf, struct slgt_info *info) @@ -3446,6 +3552,7 @@ static const struct tty_operations ops = { .chars_in_buffer = chars_in_buffer, .flush_buffer = flush_buffer, .ioctl = ioctl, + .compat_ioctl = slgt_compat_ioctl, .throttle = throttle, .unthrottle = unthrottle, .send_xchar = send_xchar, |