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authorYi Yang <yiyang13@huawei.com>2023-08-17 13:54:06 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2023-08-22 16:29:18 +0300
commit5abd01145d0cc6cd1b7c2fe6ee0b9ea0fa13671e (patch)
tree1706a6b63e1c2899d4b9c588b71c723c439c2816 /drivers/tty
parent8a6498f2b94333f1793bc912b11830655f975470 (diff)
downloadlinux-5abd01145d0cc6cd1b7c2fe6ee0b9ea0fa13671e.tar.xz
serial: tegra: handle clk prepare error in tegra_uart_hw_init()
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>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/serial-tegra.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/tty/serial/serial-tegra.c b/drivers/tty/serial/serial-tegra.c
index 0b597b282fce..d4ec943cb8e9 100644
--- a/drivers/tty/serial/serial-tegra.c
+++ b/drivers/tty/serial/serial-tegra.c
@@ -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);