nandwrite: add check for negative blockalign

Includes error messages for negative blockalign, telling the user what
the offending option and value were.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

diff --git a/nandwrite.c b/nandwrite.c
index 5373a89fc3ae7de7a98279c840a59b892938a7a7..2e45136b911642734402045c0d9f08cfb79b6304 100644 (file)
--- a/nandwrite.c
+++ b/nandwrite.c
@@ -218,6 +218,10 @@ static void process_options(int argc, char * const argv[])
                exit(EXIT_FAILURE);
        }
 
+       if (blockalign < 0)
+               errmsg_die("Can't specify negative blockalign with option -b:"
+                               " %d", blockalign);
+
        argc -= optind;
        argv += optind;