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UBI: cleanup ioctl handling 

- don't do access_ok + get/put user but use the proper macro
- remove useless checks

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This commit is contained in:
Christoph Hellwig 2007-05-17 16:32:10 +02:00 committed by Artem Bityutskiy
parent 16d8cd7ce4
commit bf07803a68
1 changed files with 5 additions and 28 deletions
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33
drivers/mtd/ubi/cdev.c
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@ -414,19 +414,7 @@ static int vol_cdev_ioctl(struct inode *inode, struct file *file,
struct ubi_device *ubi = vol->ubi;
void __user *argp = (void __user *)arg;
if (_IOC_NR(cmd) > VOL_CDEV_IOC_MAX_SEQ ||
_IOC_TYPE(cmd) != UBI_VOL_IOC_MAGIC)
return -ENOTTY;
if (_IOC_DIR(cmd) && _IOC_READ)
err = !access_ok(VERIFY_WRITE, argp, _IOC_SIZE(cmd));
else if (_IOC_DIR(cmd) && _IOC_WRITE)
err = !access_ok(VERIFY_READ, argp, _IOC_SIZE(cmd));
if (err)
return -EFAULT;
switch (cmd) {
/* Volume update command */
case UBI_IOCVOLUP:
{
@ -472,7 +460,7 @@ static int vol_cdev_ioctl(struct inode *inode, struct file *file,
{
int32_t lnum;
err = __get_user(lnum, (__user int32_t *)argp);
err = get_user(lnum, (__user int32_t *)argp);
if (err) {
err = -EFAULT;
break;
@ -588,17 +576,6 @@ static int ubi_cdev_ioctl(struct inode *inode, struct file *file,
struct ubi_volume_desc *desc;
void __user *argp = (void __user *)arg;
if (_IOC_NR(cmd) > UBI_CDEV_IOC_MAX_SEQ ||
_IOC_TYPE(cmd) != UBI_IOC_MAGIC)
return -ENOTTY;
if (_IOC_DIR(cmd) && _IOC_READ)
err = !access_ok(VERIFY_WRITE, argp, _IOC_SIZE(cmd));
else if (_IOC_DIR(cmd) && _IOC_WRITE)
err = !access_ok(VERIFY_READ, argp, _IOC_SIZE(cmd));
if (err)
return -EFAULT;
if (!capable(CAP_SYS_RESOURCE))
return -EPERM;
@ -613,7 +590,7 @@ static int ubi_cdev_ioctl(struct inode *inode, struct file *file,
struct ubi_mkvol_req req;
dbg_msg("create volume");
err = __copy_from_user(&req, argp,
err = copy_from_user(&req, argp,
sizeof(struct ubi_mkvol_req));
if (err) {
err = -EFAULT;
@ -630,7 +607,7 @@ static int ubi_cdev_ioctl(struct inode *inode, struct file *file,
if (err)
break;
err = __put_user(req.vol_id, (__user int32_t *)argp);
err = put_user(req.vol_id, (__user int32_t *)argp);
if (err)
err = -EFAULT;
@ -643,7 +620,7 @@ static int ubi_cdev_ioctl(struct inode *inode, struct file *file,
int vol_id;
dbg_msg("remove volume");
err = __get_user(vol_id, (__user int32_t *)argp);
err = get_user(vol_id, (__user int32_t *)argp);
if (err) {
err = -EFAULT;
break;
@ -670,7 +647,7 @@ static int ubi_cdev_ioctl(struct inode *inode, struct file *file,
struct ubi_rsvol_req req;
dbg_msg("re-size volume");
err = __copy_from_user(&req, argp,
err = copy_from_user(&req, argp,
sizeof(struct ubi_rsvol_req));
if (err) {
err = -EFAULT;