[PATCH -next] coresight: trbe: Fix return value check in arm_trbe_register_coresight_cpu()

[Wei Yongjun]

In case of error, the function devm_kasprintf() returns NULL
pointer not ERR_PTR(). The IS_ERR() test in the return value
check should be replaced with NULL test.

Fixes: 3fbf7f011f24 ("coresight: sink: Add TRBE driver")
Reported-by: Hulk Robot <hul...@huawei.com>
Signed-off-by: Wei Yongjun <weiyongj...@huawei.com>
---
 drivers/hwtracing/coresight/coresight-trbe.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwtracing/coresight/coresight-trbe.c 
b/drivers/hwtracing/coresight/coresight-trbe.c
index 5ce239875c98..176868496879 100644
--- a/drivers/hwtracing/coresight/coresight-trbe.c
+++ b/drivers/hwtracing/coresight/coresight-trbe.c
@@ -871,7 +871,7 @@ static void arm_trbe_register_coresight_cpu(struct 
trbe_drvdata *drvdata, int cp
 
        dev = &cpudata->drvdata->pdev->dev;
        desc.name = devm_kasprintf(dev, GFP_KERNEL, "trbe%d", cpu);
-       if (IS_ERR(desc.name))
+       if (!desc.name)
                goto cpu_clear;
 
        desc.type = CORESIGHT_DEV_TYPE_SINK;