linux-kernel - [PATCH 4.4 20/30] drivers/misc/c2port/c2port-duramar2150.c: checking for NULL instead of IS

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Message-Id: <20170619152034.318184540@linuxfoundation.org>
Date:   Mon, 19 Jun 2017 23:20:54 +0800
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        Rodolfo Giometti <giometti@...ux.it>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [PATCH 4.4 20/30] drivers/misc/c2port/c2port-duramar2150.c: checking for NULL instead of IS_ERR()

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@...cle.com>

commit 8128a31eaadbcdfa37774bbd28f3f00bac69996a upstream.

c2port_device_register() never returns NULL, it uses error pointers.

Link: http://lkml.kernel.org/r/20170412083321.GC3250@mwanda
Fixes: 65131cd52b9e ("c2port: add c2port support for Eurotech Duramar 2150")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Acked-by: Rodolfo Giometti <giometti@...ux.it>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/misc/c2port/c2port-duramar2150.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/misc/c2port/c2port-duramar2150.c
+++ b/drivers/misc/c2port/c2port-duramar2150.c
@@ -129,8 +129,8 @@ static int __init duramar2150_c2port_ini
 
 	duramar2150_c2port_dev = c2port_device_register("uc",
 					&duramar2150_c2port_ops, NULL);
-	if (!duramar2150_c2port_dev) {
-		ret = -ENODEV;
+	if (IS_ERR(duramar2150_c2port_dev)) {
+		ret = PTR_ERR(duramar2150_c2port_dev);
 		goto free_region;
 	}