qemu/hw/block/onenand.c:522: strange if statement ?

[qemu/hw/block/onenand.c:523]: (warning) Opposite inner 'if' condition leads to a dead code block.

Source code is

       for (b = 0; b < s->blocks; b ++) {
            if (b >= s->blocks) {
                s->status |= ONEN_ERR_CMD;
                break;
            }

Inner if condition will never be true.