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serial: liteuart: fix minor-number leak on probe errors 

Make sure to release the allocated minor number before returning on
probe errors.

Fixes: 1da81e5562 ("drivers/tty/serial: add LiteUART driver")
Cc: stable@vger.kernel.org      # 5.11
Cc: Filip Kokosinski <fkokosinski@antmicro.com>
Cc: Mateusz Holenko <mholenko@antmicro.com>
Reviewed-by: Stafford Horne <shorne@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20211117100512.5058-3-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2021-11-17 11:05:11 +01:00 committed by Greg Kroah-Hartman
parent 05f929b395
commit dd5e90b16c
1 changed files with 14 additions and 3 deletions
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17
drivers/tty/serial/liteuart.c
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@ -270,8 +270,10 @@ static int liteuart_probe(struct platform_device *pdev)
/* get membase */
port->membase = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
if (IS_ERR(port->membase))
return PTR_ERR(port->membase);
if (IS_ERR(port->membase)) {
ret = PTR_ERR(port->membase);
goto err_erase_id;
}
/* values not from device tree */
port->dev = &pdev->dev;
@ -287,7 +289,16 @@ static int liteuart_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, port);
return uart_add_one_port(&liteuart_driver, &uart->port);
ret = uart_add_one_port(&liteuart_driver, &uart->port);
if (ret)
goto err_erase_id;
return 0;
err_erase_id:
xa_erase(&liteuart_array, uart->id);
return ret;
}
static int liteuart_remove(struct platform_device *pdev)