From: Joel Becker <jlbec@evilplan.org>
Date: Tue, 22 Feb 2011 09:09:49 +0000 (-0800)
Subject: configfs: Don't try to d_delete() negative dentries.
X-Git-Tag: v2.6.39~1^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=df7f99670a4c76f269ae57ce91876b309417a316;p=pandora-kernel.git

configfs: Don't try to d_delete() negative dentries.

When configfs is faking mkdir() on its subsystem or default group
objects, it starts by adding a negative dentry.  It then tries to
instantiate the group.  If that should fail, it must clean up after
itself.

I was using d_delete() here, but configfs_attach_group() promises to
return an empty dentry on error.  d_delete() explodes with the entry
dentry.  Let's try d_drop() instead.  The unhashing is what we want for
our dentry.

Signed-off-by: Joel Becker <jlbec@evilplan.org>
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