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

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

Fixes: e9ea096dd2 ("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>
This commit is contained in:
Yi Yang 2023-08-17 18:54:06 +08:00 committed by Greg Kroah-Hartman
parent 8a6498f2b9
commit 5abd01145d
1 changed files with 5 additions and 1 deletions
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6
drivers/tty/serial/serial-tegra.c
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@ -996,7 +996,11 @@ 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);