Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   David Kozub <zub@linux.fjfi.cvut.cz>
Date:   Thu, 15 Nov 2018 21:33:33 +0100
Subject: [PATCH 06/16] block: sed-opal: unify error handling of responses
To:     Jens Axboe <axboe@kernel.dk>, Scott Bauer <scott.bauer@intel.com>,
        Jonathan Derrick <jonathan.derrick@intel.com>,
        linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
Cc:     Jonas Rabenstein <jonas.rabenstein@studium.uni-erlangen.de>
Message-Id: <20190116225540.470186004E@linux.fjfi.cvut.cz>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

response_get_{string,u64} include error handling for argument resp being
NULL but response_get_token does not handle this.

Make all three of response_get_{string,u64,token} handle NULL resp in
the same way.

Co-authored-by: Jonas Rabenstein <jonas.rabenstein@studium.uni-erlangen.de>
Signed-off-by: David Kozub <zub@linux.fjfi.cvut.cz>
Signed-off-by: Jonas Rabenstein <jonas.rabenstein@studium.uni-erlangen.de>
---
 block/sed-opal.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/block/sed-opal.c b/block/sed-opal.c
index e29cb2f445ff..537cd73ea88a 100644
--- a/block/sed-opal.c
+++ b/block/sed-opal.c
@@ -702,6 +702,11 @@ static const struct opal_resp_tok *response_get_token(
 {
 	const struct opal_resp_tok *tok;
 
+	if (!resp) {
+		pr_debug("Response is NULL\n");
+		return ERR_PTR(-EINVAL);
+	}
+
 	if (n >= resp->num) {
 		pr_debug("Token number doesn't exist: %d, resp: %d\n",
 			 n, resp->num);
-- 
2.20.1