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If an empty firmware file is supplied via CONFIG_EXTRA_FIRMWARE, the build currently succeeds but creates an empty section. While the firmware loader will not return such sections it is better to avoid adding them in the first place. Add a compile-time size check to the filechk_fwbin macro to abort the build early if a 0-size firmware is encountered. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Link: https://patch.msgid.link/20260426043041.649202-2-dmitry.torokhov@gmail.com [ Use 'exit 1' to properly fail the build. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>