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-rw-r--r--nand-utils/nandwrite.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/nand-utils/nandwrite.c b/nand-utils/nandwrite.c
index 9602a6e..998c68c 100644
--- a/nand-utils/nandwrite.c
+++ b/nand-utils/nandwrite.c
@@ -191,9 +191,13 @@ static void process_options(int argc, char * const argv[])
errmsg_die("Can't specify negative device offset with option"
" -s: %lld", mtdoffset);
- if (blockalign < 0)
- errmsg_die("Can't specify negative blockalign with option -b:"
- " %d", blockalign);
+ if (blockalign <= 0)
+ errmsg_die("Can't specify negative or zero blockalign with "
+ "option -b: %d", blockalign);
+
+ if (!is_power_of_2(blockalign))
+ errmsg_die("Can't specify a non-power-of-two blockalign with "
+ "option -b: %d", blockalign);
if (autoplace && noecc)
errmsg_die("Autoplacement and no-ECC are mutually exclusive");