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| author | Yi Yang <yiyang13@huawei.com> | 2023-08-17 18:54:06 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-09-13 09:42:56 +0200 |
| commit | db18d5e3eee46f2da86191d9669ac9d763ee57d8 (patch) | |
| tree | 72d141d975dec090e8371c768952ea778b0ea1ad /drivers/tty | |
| parent | 93e908545361c58a092dad46999536d2c12159b0 (diff) | |
| download | linux-stable-db18d5e3eee46f2da86191d9669ac9d763ee57d8.tar.gz linux-stable-db18d5e3eee46f2da86191d9669ac9d763ee57d8.tar.bz2 linux-stable-db18d5e3eee46f2da86191d9669ac9d763ee57d8.zip | |
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@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>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/serial-tegra.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/tty/serial/serial-tegra.c b/drivers/tty/serial/serial-tegra.c index c08360212aa2..7aa2b5b67001 100644 --- a/drivers/tty/serial/serial-tegra.c +++ b/drivers/tty/serial/serial-tegra.c @@ -999,7 +999,11 @@ 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); |