This is a note to let you know that I've just added the patch titled
serial: tegra: handle clk prepare error in tegra_uart_hw_init()
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
serial-tegra-handle-clk-prepare-error-in-tegra_uart_.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 29ff2b1baada90b6859cadb17072303b505b63b5
Author: Yi Yang <yiyang13@xxxxxxxxxx>
Date: Thu Aug 17 18:54:06 2023 +0800
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: e9ea096dd225 ("serial: tegra: add serial driver")
Signed-off-by: Yi Yang <yiyang13@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230817105406.228674-1-yiyang13@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
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);
