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3ce8a0e911
The issue was a mismatch in return value conventions between functions: - getvar_get_part_info() expects >= 0 for success - fb_nand_lookup() returns 0 on success, 1 on failure (from mtdparts_init and find_dev_and_part) When partition didn't exist, fb_nand_lookup returned 1, but fastboot_nand_get_part_info passed it directly to getvar_get_part_info, which treated 1 >= 0 as success, causing has-slot to always return yes. Fix by converting positive return values to -ENOENT in fastboot_nand_get_part_info to match the expected error convention. Signed-off-by: Chance Yang <chance.yang@kneron.us> Reviewed-by: Mattijs Korpershoek <mkorpershoek@kernel.org> Link: https://lore.kernel.org/r/20250826-master-v2-1-30b787a2f9fd@kneron.us Signed-off-by: Mattijs Korpershoek <mkorpershoek@kernel.org>