[PATCH] dm table split_args: handle no input

Return sense if dm_split_args is called with a NULL input parameter.

Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index b6183eda8106..10c9439635ca 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -590,6 +590,12 @@ int dm_split_args(int *argc, char ***argvp, char *input)
         unsigned array_size = 0;
 
         *argc = 0;
+
+        if (!input) {
+                *argvp = NULL;
+                return 0;
+        }
+
         argv = realloc_argv(&array_size, argv);
         if (!argv)
                 return -ENOMEM;