oradax: Fix return value check in dax_attach()

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().

Fixes: dd0273284c74 ("sparc64: Oracle DAX driver")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/sbus/char/oradax.c b/drivers/sbus/char/oradax.c
index 10452ae18ef1..03dc04739225 100644
--- a/drivers/sbus/char/oradax.c
+++ b/drivers/sbus/char/oradax.c
@@ -336,9 +336,9 @@ static int __init dax_attach(void)
         }
 
         cl = class_create(THIS_MODULE, DAX_NAME);
-        if (cl == NULL) {
+        if (IS_ERR(cl)) {
                 dax_err("class_create failed");
-                ret = -ENXIO;
+                ret = PTR_ERR(cl);
                 goto class_error;
         }