diff options
| author | Jan Kara <jack@suse.cz> | 2012-06-12 18:20:31 +0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-07-31 01:02:50 +0400 |
| commit | e24f17da3560781e274699f066fb788ad52f4402 (patch) | |
| tree | 8523d7d7e6cc4d33d2cec4172fe055f104d8647d /fs/fat | |
| parent | c30dabfe5d10c5fd70d882e5afb8f59f2942b194 (diff) | |
| download | linux-e24f17da3560781e274699f066fb788ad52f4402.tar.xz | |
fat: Push mnt_want_write() outside of i_mutex
When mnt_want_write() starts to handle freezing it will get a full lock
semantics requiring proper lock ordering. So push mnt_want_write() call
outside of i_mutex as in other places.
CC: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/fat')
| -rw-r--r-- | fs/fat/file.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/fs/fat/file.c b/fs/fat/file.c index a71fe3715ee8..e007b8bd8e5e 100644 --- a/fs/fat/file.c +++ b/fs/fat/file.c @@ -43,10 +43,10 @@ static int fat_ioctl_set_attributes(struct file *file, u32 __user *user_attr) if (err) goto out; - mutex_lock(&inode->i_mutex); err = mnt_want_write_file(file); if (err) - goto out_unlock_inode; + goto out; + mutex_lock(&inode->i_mutex); /* * ATTR_VOLUME and ATTR_DIR cannot be changed; this also @@ -73,14 +73,14 @@ static int fat_ioctl_set_attributes(struct file *file, u32 __user *user_attr) /* The root directory has no attributes */ if (inode->i_ino == MSDOS_ROOT_INO && attr != ATTR_DIR) { err = -EINVAL; - goto out_drop_write; + goto out_unlock_inode; } if (sbi->options.sys_immutable && ((attr | oldattr) & ATTR_SYS) && !capable(CAP_LINUX_IMMUTABLE)) { err = -EPERM; - goto out_drop_write; + goto out_unlock_inode; } /* @@ -90,12 +90,12 @@ static int fat_ioctl_set_attributes(struct file *file, u32 __user *user_attr) */ err = security_inode_setattr(file->f_path.dentry, &ia); if (err) - goto out_drop_write; + goto out_unlock_inode; /* This MUST be done before doing anything irreversible... */ err = fat_setattr(file->f_path.dentry, &ia); if (err) - goto out_drop_write; + goto out_unlock_inode; fsnotify_change(file->f_path.dentry, ia.ia_valid); if (sbi->options.sys_immutable) { @@ -107,10 +107,9 @@ static int fat_ioctl_set_attributes(struct file *file, u32 __user *user_attr) fat_save_attrs(inode, attr); mark_inode_dirty(inode); -out_drop_write: - mnt_drop_write_file(file); out_unlock_inode: mutex_unlock(&inode->i_mutex); + mnt_drop_write_file(file); out: return err; } |