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efivarfs: efivarfs_fill_super() fix inode reference counts 

When d_make_root() fails it will automatically drop the reference
on the root inode.  We should not be doing so as well.

Signed-off-by: Andy Whitcroft <apw@canonical.com>
Acked-by: Matthew Garrett <mjg@redhat.com>
Acked-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
This commit is contained in:
Andy Whitcroft 2012-10-11 11:32:19 +01:00 committed by Matt Fleming
parent 45a937a883
commit 5c9b50ab8c
1 changed files with 4 additions and 12 deletions
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16
drivers/firmware/efivars.c
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@ -948,7 +948,6 @@ int efivarfs_fill_super(struct super_block *sb, void *data, int silent)
struct dentry *root;
struct efivar_entry *entry, *n;
struct efivars *efivars = &__efivars;
int err;
efivarfs_sb = sb;
@ -960,18 +959,14 @@ int efivarfs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_time_gran = 1;
inode = efivarfs_get_inode(sb, NULL, S_IFDIR | 0755, 0);
if (!inode) {
err = -ENOMEM;
goto fail;
}
if (!inode)
return -ENOMEM;
inode->i_op = &efivarfs_dir_inode_operations;
root = d_make_root(inode);
sb->s_root = root;
if (!root) {
err = -ENOMEM;
goto fail;
}
if (!root)
return -ENOMEM;
list_for_each_entry_safe(entry, n, &efivars->list, list) {
struct inode *inode;
@ -1012,9 +1007,6 @@ int efivarfs_fill_super(struct super_block *sb, void *data, int silent)
}
return 0;
fail:
iput(inode);
return err;
}
static struct dentry *efivarfs_mount(struct file_system_type *fs_type,