Re: [PATCH 3/3] serial: liteuart: fix minor-number leak on probe errors
From: Stafford Horne <shorne@gmail.com>
Date: 2021-11-16 00:10:09
Also in:
lkml, stable
On Mon, Nov 15, 2021 at 02:37:45PM +0100, Johan Hovold wrote:
Make sure to release the allocated minor number before returning on
probe errors.
Fixes: 1da81e5562fa ("drivers/tty/serial: add LiteUART driver")
Cc: stable@vger.kernel.org # 5.11
Cc: Filip Kokosinski <redacted>
Cc: Mateusz Holenko <mholenko@antmicro.com>
Cc: Stafford Horne <shorne@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>Reviewed-by: Stafford Horne <shorne@gmail.com>
quoted hunk ↗ jump to hunk
--- drivers/tty/serial/liteuart.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-)diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c index da792d0df790..2941659e5274 100644 --- a/drivers/tty/serial/liteuart.c +++ b/drivers/tty/serial/liteuart.c@@ -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)-- 2.32.0