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NFS: handle inode==NULL in __put_nfs_open_context

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inode may be NULL when put_nfs_open_context is called from nfs_atomic_lookup
before d_add_unique(dentry, inode)

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Benny Halevy 2010-09-23 12:22:09 -04:00 committed by Trond Myklebust
parent 5eebde2322
commit ef84303ebc
1 changed files with 7 additions and 4 deletions
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11
fs/nfs/inode.c
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@ -654,11 +654,14 @@ static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
{
struct inode *inode = ctx->path.dentry->d_inode;
if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock))
if (inode) {
if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock))
return;
list_del(&ctx->list);
spin_unlock(&inode->i_lock);
NFS_PROTO(inode)->close_context(ctx, is_sync);
} else if (!atomic_dec_and_test(&ctx->lock_context.count))
return;
list_del(&ctx->list);
spin_unlock(&inode->i_lock);
NFS_PROTO(inode)->close_context(ctx, is_sync);
if (ctx->cred != NULL)
put_rpccred(ctx->cred);
path_put(&ctx->path);