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synclink_gt: add compat_ioctl

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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>
This commit is contained in:
Paul Fulghum 2007-05-10 22:22:43 -07:00 committed by Linus Torvalds
parent 4c64c30a5c
commit 2acdb16944
3 changed files with 132 additions and 1 deletions
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107
drivers/char/synclink_gt.c
View file

@ -1170,6 +1170,112 @@ static int ioctl(struct tty_struct *tty, struct file *file,
return 0;
}
/*
* 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
*/
@ -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,

2
include/linux/Kbuild
View file

@ -140,7 +140,6 @@ header-y += snmp.h
header-y += sockios.h
header-y += som.h
header-y += sound.h
header-y += synclink.h
header-y += taskstats.h
header-y += telephony.h
header-y += termios.h
@ -320,6 +319,7 @@ unifdef-y += sonypi.h
unifdef-y += soundcard.h
unifdef-y += stat.h
unifdef-y += stddef.h
unifdef-y += synclink.h
unifdef-y += sysctl.h
unifdef-y += tcp.h
unifdef-y += time.h

24
include/linux/synclink.h
View file

@ -291,4 +291,28 @@ struct gpio_desc {
#define MGSL_IOCGGPIO _IOR(MGSL_MAGIC_IOC,17,struct gpio_desc)
#define MGSL_IOCWAITGPIO _IOWR(MGSL_MAGIC_IOC,18,struct gpio_desc)
#ifdef __KERNEL__
/* provide 32 bit ioctl compatibility on 64 bit systems */
#ifdef CONFIG_COMPAT
#include <linux/compat.h>
struct MGSL_PARAMS32 {
compat_ulong_t mode;
unsigned char loopback;
unsigned short flags;
unsigned char encoding;
compat_ulong_t clock_speed;
unsigned char addr_filter;
unsigned short crc_type;
unsigned char preamble_length;
unsigned char preamble;
compat_ulong_t data_rate;
unsigned char data_bits;
unsigned char stop_bits;
unsigned char parity;
};
#define MGSL_IOCSPARAMS32 _IOW(MGSL_MAGIC_IOC,0,struct MGSL_PARAMS32)
#define MGSL_IOCGPARAMS32 _IOR(MGSL_MAGIC_IOC,1,struct MGSL_PARAMS32)
#endif
#endif
#endif /* _SYNCLINK_H_ */