can: mscan-mpc5xxx: fix return value check in mpc512x_can_get_clock()

In case of error, the function clk_get() returns ERR_PTR()
and never returns NULL pointer. The NULL test in the error
handling should be replaced with IS_ERR().

dpatch engine is used to auto generated this patch.
(https://github.com/weiyj/dpatch)

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/drivers/net/can/mscan/mpc5xxx_can.c b/drivers/net/can/mscan/mpc5xxx_can.c
index 06adf88..524ef96 100644 (file)
--- a/drivers/net/can/mscan/mpc5xxx_can.c
+++ b/drivers/net/can/mscan/mpc5xxx_can.c
@@ -181,7 +181,7 @@ static u32 __devinit mpc512x_can_get_clock(struct platform_device *ofdev,
 
                if (!clock_name || !strcmp(clock_name, "sys")) {
                        sys_clk = clk_get(&ofdev->dev, "sys_clk");
-                       if (!sys_clk) {
+                       if (IS_ERR(sys_clk)) {
                                dev_err(&ofdev->dev, "couldn't get sys_clk\n");
                                goto exit_unmap;
                        }
@@ -204,7 +204,7 @@ static u32 __devinit mpc512x_can_get_clock(struct platform_device *ofdev,
 
                if (clocksrc < 0) {
                        ref_clk = clk_get(&ofdev->dev, "ref_clk");
-                       if (!ref_clk) {
+                       if (IS_ERR(ref_clk)) {
                                dev_err(&ofdev->dev, "couldn't get ref_clk\n");
                                goto exit_unmap;
                        }