linux-kernel - [PATCH] serial: 8250_tegra: Fix an error handling path in tegra_uart

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Message-Id: <f8130f35339cc80edc6b9aac4bb2a60b60a226bf.1684063511.git.christophe.jaillet@wanadoo.fr>
Date:   Sun, 14 May 2023 13:25:42 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Jeff Brasen <jbrasen@...dia.com>
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        linux-serial@...r.kernel.org, linux-tegra@...r.kernel.org
Subject: [PATCH] serial: 8250_tegra: Fix an error handling path in tegra_uart_probe()

If an error occurs after reset_control_deassert(), it must be re-asserted,
as already done in the .remove() function.

Fixes: c6825c6395b7 ("serial: 8250_tegra: Create Tegra specific 8250 driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/tty/serial/8250/8250_tegra.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/serial/8250/8250_tegra.c b/drivers/tty/serial/8250/8250_tegra.c
index 2509e7f74ccf..89956bbf34d9 100644
--- a/drivers/tty/serial/8250/8250_tegra.c
+++ b/drivers/tty/serial/8250/8250_tegra.c
@@ -113,13 +113,15 @@ static int tegra_uart_probe(struct platform_device *pdev)
 
 	ret = serial8250_register_8250_port(&port8250);
 	if (ret < 0)
-		goto err_clkdisable;
+		goto err_ctrl_assert;
 
 	platform_set_drvdata(pdev, uart);
 	uart->line = ret;
 
 	return 0;
 
+err_ctrl_assert:
+	reset_control_assert(uart->rst);
 err_clkdisable:
 	clk_disable_unprepare(uart->clk);
 
-- 
2.34.1