[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>

diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index b6183ed..10c9439 100644 (file)
--- 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;