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No error code are available to signal an invalid firmware content. Drivers that can check the firmware content validity can not return this specific failure to the user-space Expand the firmware error code with an additional code: - "firmware invalid" code which can be used when the provided firmware is invalid Sync lib/test_firmware.c file accordingly. Acked-by: Luis Chamberlain <mcgrof@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kory Maincent <kory.maincent@bootlin.com> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://lore.kernel.org/r/20231122-feature_firmware_error_code-v3-1-04ec753afb71@bootlin.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>