From acbdad8dd1abd98b216d8c37ff9c6de4aa595534 Mon Sep 17 00:00:00 2001 From: Philipp Zabel Date: Wed, 15 Mar 2017 12:31:50 +0100 Subject: [PATCH] serial: 8250_dw: simplify optional reset handling As of commit bb475230b8e5 ("reset: make optional functions really optional"), the reset framework API calls use NULL pointers to describe optional, non-present reset controls. This allows to return errors from devm_reset_control_get_optional and to call reset_control_(de)assert unconditionally. Signed-off-by: Philipp Zabel Reviewed-by: Andy Shevchenko Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_dw.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index 6ee55a2..e0215db 100644 --- a/drivers/tty/serial/8250/8250_dw.c +++ b/drivers/tty/serial/8250/8250_dw.c @@ -525,12 +525,11 @@ static int dw8250_probe(struct platform_device *pdev) } data->rst = devm_reset_control_get_optional(dev, NULL); - if (IS_ERR(data->rst) && PTR_ERR(data->rst) == -EPROBE_DEFER) { - err = -EPROBE_DEFER; + if (IS_ERR(data->rst)) { + err = PTR_ERR(data->rst); goto err_pclk; } - if (!IS_ERR(data->rst)) - reset_control_deassert(data->rst); + reset_control_deassert(data->rst); dw8250_quirks(p, data); @@ -562,8 +561,7 @@ static int dw8250_probe(struct platform_device *pdev) return 0; err_reset: - if (!IS_ERR(data->rst)) - reset_control_assert(data->rst); + reset_control_assert(data->rst); err_pclk: if (!IS_ERR(data->pclk)) @@ -584,8 +582,7 @@ static int dw8250_remove(struct platform_device *pdev) serial8250_unregister_port(data->line); - if (!IS_ERR(data->rst)) - reset_control_assert(data->rst); + reset_control_assert(data->rst); if (!IS_ERR(data->pclk)) clk_disable_unprepare(data->pclk); -- 2.7.4