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ocfs2: Add missing iput() during error handling in ocfs2_dentry_attach_lock() 

In ocfs2_dentry_attach_lock(), if unable to get the dentry lock, we need to
call iput(inode) because a failure here means no d_instantiate(), which means
the normally matching iput() will not be called during dput(dentry).

This patch fixes the oops that accompanies the following message:
(3996,1):dlm_empty_lockres:2708 ERROR: lockres W00000000000000000a1046b06a4382 still has local locks!
kernel BUG in dlm_empty_lockres at /rpmbuild/smushran/BUILD/ocfs2-1.4.2/fs/ocfs2/dlm/dlmmaster.c:2709!

Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
This commit is contained in:
Sunil Mushran 2009-04-20 21:34:18 -07:00 committed by Joel Becker
parent 5b09b507da
commit a5a0a63092
1 changed files with 15 additions and 0 deletions
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15
fs/ocfs2/dcache.c
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@ -290,6 +290,21 @@ out_attach:
else
mlog_errno(ret);
/*
* In case of error, manually free the allocation and do the iput().
* We need to do this because error here means no d_instantiate(),
* which means iput() will not be called during dput(dentry).
*/
if (ret < 0 && !alias) {
ocfs2_lock_res_free(&dl->dl_lockres);
BUG_ON(dl->dl_count != 1);
spin_lock(&dentry_attach_lock);
dentry->d_fsdata = NULL;
spin_unlock(&dentry_attach_lock);
kfree(dl);
iput(inode);
}
dput(alias);
return ret;