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When blk_get_dev() fails, block NULL and gets de-referenced in the error path by a printf(), resulting in a crash. This can be reproduced on sandbox with: $ ./u-boot --command "bcb load mmc 0 0" Fix the message by using the functions arguments (iface, devnum) instead. Note: partition (being a global static initialized) can be used safely. This issue has been reported by coverity [1] [1] https://lore.kernel.org/all/20240723141844.GF989285@bill-the-cat/ Fixes: dfeb4f0d7935 ("cmd: bcb: extend BCB C API to allow read/write the fields") Reviewed-by: Dmitrii Merkurev <dimorinny@google.com> Link: https://lore.kernel.org/r/20240724-bcb-crash-v1-1-44caff15bce4@baylibre.com Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>