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The function gpib_register_driver() can fail, resulting in a semi-registered module and does not return an error value if it fails. Unregister the previous platform driver and gpib registering functions if subsequent gpib_register_driver() fail and return the error value. Add pr_err() statements indicating the fail and the error value. Signed-off-by: Nihar Chaithanya <niharchaithanya@gmail.com> Link: https://lore.kernel.org/r/20241230185633.175690-7-niharchaithanya@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>