From: Patrick Caulfield <pcaulfie@redhat.com>
Date: Mon, 1 Oct 2007 14:28:42 +0000 (+0100)
Subject: [DLM] don't overwrite castparam if it's NULL
X-Git-Tag: v2.6.24-rc1~1405^2~1
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b434eda6fda5bcdcc2dd918e5ffbf7184f2d4e17;p=pandora-kernel.git

[DLM] don't overwrite castparam if it's NULL

If the castaddr passed to the userland API is NULL then don't overwrite the
existing castparam. This allows a different thread to cancel a lock request and
the CANCEL AST gets delivered to the original thread.

bz#306391 (for RHEL4) refers.

Signed-Off-By: Patrick Caulfield <pcaulfie@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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