pwm: renesas-tpu: fix return value check in tpu_probe()

In case of error, the function devm_ioremap_resource() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check should
be replaced with IS_ERR().

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Reviewed-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/pwm/pwm-renesas-tpu.c b/drivers/pwm/pwm-renesas-tpu.c
index 96e0cc488a4e..03c1aa3c48a2 100644
--- a/drivers/pwm/pwm-renesas-tpu.c
+++ b/drivers/pwm/pwm-renesas-tpu.c
@@ -410,10 +410,8 @@ static int tpu_probe(struct platform_device *pdev)
         }
 
         tpu->base = devm_ioremap_resource(&pdev->dev, res);
-        if (tpu->base == NULL) {
-                dev_err(&pdev->dev, "failed to remap I/O memory\n");
-                return -ENXIO;
-        }
+        if (IS_ERR(tpu->base))
+                return PTR_ERR(tpu->base);
 
         tpu->clk = devm_clk_get(&pdev->dev, NULL);
         if (IS_ERR(tpu->clk)) {