[PATCH -next] rapidio/rio_cm: fix return value check in riocm_init()

[Wei Yongjun]

In case of error, the function class_create() 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 <weiyj.lk@xxxxxxxxx>
---
 drivers/rapidio/rio_cm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/rapidio/rio_cm.c b/drivers/rapidio/rio_cm.c
index 0683e5e..cecc15a 100644
--- a/drivers/rapidio/rio_cm.c
+++ b/drivers/rapidio/rio_cm.c
@@ -2288,9 +2288,9 @@ static int __init riocm_init(void)
 
 	/* Create device class needed by udev */
 	dev_class = class_create(THIS_MODULE, DRV_NAME);
-	if (!dev_class) {
+	if (IS_ERR(dev_class)) {
 		riocm_error("Cannot create " DRV_NAME " class");
-		return -EINVAL;
+		return PTR_ERR(dev_class);
 	}
 
 	ret = alloc_chrdev_region(&dev_number, 0, 1, DRV_NAME);