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| author | Yuanjun Gong <ruc_gongyuanjun@163.com> | 2023-07-17 22:47:33 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-07-30 13:53:19 +0200 |
| commit | 130a9571aee966ad8ba65719fe6c32db7b26db6a (patch) | |
| tree | 1f8e6e7416e966c47accbe55951017eae087a4c7 | |
| parent | 17be181b061b4b7b72d4ffb856d94a356592bfd7 (diff) | |
| download | linux-stable-130a9571aee966ad8ba65719fe6c32db7b26db6a.tar.gz linux-stable-130a9571aee966ad8ba65719fe6c32db7b26db6a.tar.bz2 linux-stable-130a9571aee966ad8ba65719fe6c32db7b26db6a.zip | |
drivers:tty: fix return value check in asc_init_port
in asc_init_port, clk_prepare_enable may fail, therefore, the
return value of clk_prepare_enable should be checked.
Signed-off-by: Yuanjun Gong <ruc_gongyuanjun@163.com>
Link: https://lore.kernel.org/r/20230717144733.24194-1-ruc_gongyuanjun@163.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/serial/st-asc.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/tty/serial/st-asc.c b/drivers/tty/serial/st-asc.c index b8954f0bba8f..92b9f6894006 100644 --- a/drivers/tty/serial/st-asc.c +++ b/drivers/tty/serial/st-asc.c @@ -703,7 +703,9 @@ static int asc_init_port(struct asc_port *ascport, if (WARN_ON(IS_ERR(ascport->clk))) return -EINVAL; /* ensure that clk rate is correct by enabling the clk */ - clk_prepare_enable(ascport->clk); + ret = clk_prepare_enable(ascport->clk); + if (ret) + return ret; ascport->port.uartclk = clk_get_rate(ascport->clk); WARN_ON(ascport->port.uartclk == 0); clk_disable_unprepare(ascport->clk); |