[PATCH -next] misc: genwqe: fix return value check in genwqe_device_create()

[Wei Yongjun]

From: Wei Yongjun <yongjun_wei@xxxxxxxxxxxxxxxxx>

In case of error, the function device_create_with_groups()
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@xxxxxxxxxxxxxxxxx>
---
 drivers/misc/genwqe/card_dev.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/genwqe/card_dev.c b/drivers/misc/genwqe/card_dev.c
index 9b231bb..46fa2ca 100644
--- a/drivers/misc/genwqe/card_dev.c
+++ b/drivers/misc/genwqe/card_dev.c
@@ -1378,8 +1378,8 @@ int genwqe_device_create(struct genwqe_dev *cd)
 					    genwqe_attribute_groups,
 					    GENWQE_DEVNAME "%u_card",
 					    cd->card_idx);
-	if (cd->dev == NULL) {
-		rc = -ENODEV;
+	if (IS_ERR(cd->dev)) {
+		rc = PTR_ERR(cd->dev);
 		goto err_cdev;
 	}
 

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