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serial: max310x: unregister uart driver in case of failure and abort 

The macro "spi_register_driver" invokes the function
"__spi_register_driver()" which has a return type of int and can fail,
returning a negative value in such a case. This is currently ignored and
the init() function yields success even if the spi driver failed to
register.

Fix this by collecting the return value of "__spi_register_driver()" and
also unregister the uart driver in case of failure.

Cc: Jiri Slaby <jirislaby@kernel.org>
Signed-off-by: Atul Gopinathan <atulgopinathan@gmail.com>
Link: https://lore.kernel.org/r/20210503115736.2104747-12-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Atul Gopinathan 2021-05-03 13:56:38 +02:00 committed by Greg Kroah-Hartman
parent b0a85abbe9
commit 3890e3dea3
1 changed files with 4 additions and 2 deletions
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6
drivers/tty/serial/max310x.c
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@ -1518,10 +1518,12 @@ static int __init max310x_uart_init(void)
return ret;
#ifdef CONFIG_SPI_MASTER
spi_register_driver(&max310x_spi_driver);
ret = spi_register_driver(&max310x_spi_driver);
if (ret)
uart_unregister_driver(&max310x_uart);
#endif
return 0;
return ret;
}
module_init(max310x_uart_init);