am335x: NAND boot problem using the legacy u-boot.img

[Yegor Yefremov]

HI all,

trying to boot using the latest master, I get the following error:

U-Boot SPL 2025.10-rc4 (Sep 23 2025 - 16:45:07 +0200)
Trying to boot from NAND
Error: -5
SPL: failed to boot from all boot devices (err=-5)
### ERROR ### Please RESET the board ###

It turns out that bl_len will be set to 0 in spl_nand_read():

spl_set_bl_len(load, nand_page_size());

This sets the aligned image size to 0 in _spl_load():

size = ALIGN(spl_image->size + overhead, spl_get_bl_len(info));

Looks like FIT images with full FIT support will be also affected:

                       read = info->read(info, offset,
                                           ALIGN(size, spl_get_bl_len(info)),
                                            buf);

If I manually set bl_len to 1, I can boot without an issue. What am I missing?

Best regards,
Yegor