ubiformat: check that min IO size is power of 2

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

diff --git a/ubi-utils/src/ubiformat.c b/ubi-utils/src/ubiformat.c
index 681ea305794100fdb1b21c60336c09c5807b0ef8..c87dfd026c3334967d4b865ae95f1c32779322c5 100644 (file)
--- a/ubi-utils/src/ubiformat.c
+++ b/ubi-utils/src/ubiformat.c
@@ -721,6 +721,11 @@ int main(int argc, char * const argv[])
                goto out_close_mtd;
        }
 
+       if (!is_power_of_2(mtd.min_io_size)) {
+               errmsg("min. I/O size is %d, but should be power of 2");
+               goto out_close;
+       }
+
        if (!mtd_info.sysfs_supported) {
                /*
                 * Linux kernels older than 2.6.30 did not support sysfs