tty: of_serial: fix return value check in of_platform_serial_setup()
In case of error, the function clk_get() returns ERR_PTR()
and never returns NULL. The NULL test in the return value
check should be replaced with IS_ERR().
dpatch engine is used to auto generate this patch.
(https://github.com/weiyj/dpatch)
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c
index 533ccfe..b9fdccb 100644
--- a/drivers/tty/serial/of_serial.c
+++ b/drivers/tty/serial/of_serial.c
@@ -66,10 +66,10 @@
/* Get clk rate through clk driver if present */
info->clk = clk_get(&ofdev->dev, NULL);
- if (info->clk == NULL) {
+ if (IS_ERR(info->clk)) {
dev_warn(&ofdev->dev,
"clk or clock-frequency not defined\n");
- return -ENODEV;
+ return PTR_ERR(info->clk);
}
clk_prepare_enable(info->clk);
