5.4-stable review patch. If anyone has any objections, please let me know.
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From: Yi Yang yiyang13@huawei.com
[ Upstream commit 5abd01145d0cc6cd1b7c2fe6ee0b9ea0fa13671e ]
In tegra_uart_hw_init(), the return value of clk_prepare_enable() should be checked since it might fail.
Fixes: e9ea096dd225 ("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 --- drivers/tty/serial/serial-tegra.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/serial-tegra.c b/drivers/tty/serial/serial-tegra.c index 7930f2a81b4c1..2b5d26df5fcfc 100644 --- a/drivers/tty/serial/serial-tegra.c +++ b/drivers/tty/serial/serial-tegra.c @@ -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);