On Sun, 5 Sep 2010 22:32:56 +0400
Kulikov Vasiliy <sego...@gmail.com> wrote:
> From: Vasiliy Kulikov <sego...@gmail.com>
>
> Function get_inode may return ERR_PTR(...). Check for it.
>
> Signed-off-by: Vasiliy Kulikov <sego...@gmail.com>
> ---
> Compile tested.
>
> fs/hppfs/hppfs.c | 4 ++--
> 1 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
> index 7b02772..e7d6535 100644
> --- a/fs/hppfs/hppfs.c
> +++ b/fs/hppfs/hppfs.c
> @@ -173,7 +173,7 @@ static struct dentry *hppfs_lookup(struct inode *ino,
> struct dentry *dentry,
>
> err = -ENOMEM;
> inode = get_inode(ino->i_sb, proc_dentry);
> - if (!inode)
> + if (IS_ERR_OR_NULL(inode))
> goto out_dput;
>
> d_add(dentry, inode);
> @@ -730,7 +730,7 @@ static int hppfs_fill_super(struct super_block *sb, void
> *d, int silent)
>
> err = -ENOMEM;
> root_inode = get_inode(sb, proc_mnt->mnt_sb->s_root);
> - if (!root_inode)
> + if (IS_ERR_OR_NULL(root_inode))
> goto out_mntput;
>
> sb->s_root = d_alloc_root(root_inode);
This fix is rather half-and-half.
If we're going to *assume* that an IS_ERR_OR_NULL return from
get_inode() means ENOMEM then there was no point in returning an errno
from get_inode()! So we can just do this:
--- a/fs/hppfs/hppfs.c~a
+++ a/fs/hppfs/hppfs.c
@@ -683,7 +683,7 @@ static struct inode *get_inode(struct su
struct inode *inode = new_inode(sb);
if (!inode)
- return ERR_PTR(-ENOMEM);
+ return NULL;
if (S_ISDIR(dentry->d_inode->i_mode)) {
inode->i_op = &hppfs_dir_iops;
_
If, however, we want to be able to return other error codes from
get_inode() (which is generally a good idea) then we should change the
callers of get_inode() to use PTR_ERR() and to propagate the error code
upwards.
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