Commit 93a4aefa authored Aug 17, 2023 by Yi Yang Committed by Greg Kroah-Hartman Sep 23, 2023

serial: tegra: handle clk prepare error in tegra_uart_hw_init()



[ Upstream commit 5abd01145d0cc6cd1b7c2fe6ee0b9ea0fa13671e ]

In tegra_uart_hw_init(), the return value of clk_prepare_enable() should
be checked since it might fail.

Fixes: e9ea096d ("serial: tegra: add serial driver")
Signed-off-by: Yi Yang <yiyang13@huawei.com>
Link: https://lore.kernel.org/r/20230817105406.228674-1-yiyang13@huawei.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent d2bf2567

drivers/tty/serial/serial-tegra.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -1000,7 +1000,11 @@ static int tegra_uart_hw_init(struct tegra_uart_port *tup)
		tup->ier_shadow = 0;
		tup->current_baud = 0;

		clk_prepare_enable(tup->uart_clk);
		ret = clk_prepare_enable(tup->uart_clk);
		if (ret) {
		dev_err(tup->uport.dev, "could not enable clk\n");
		return ret;
		}

		/* Reset the UART controller to clear all previous status.*/
		reset_control_assert(tup->rst);