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From:   David Kozub <zub@linux.fjfi.cvut.cz>
To:     Jens Axboe <axboe@kernel.dk>,
        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>,
        David Kozub <zub@linux.fjfi.cvut.cz>
Subject: [PATCH v2 06/16] block: sed-opal: unify error handling of responses
Date:   Thu, 17 Jan 2019 22:31:46 +0100
Message-Id: <1547760716-7304-7-git-send-email-zub@linux.fjfi.cvut.cz>
In-Reply-To: <1547760716-7304-1-git-send-email-zub@linux.fjfi.cvut.cz>
References: <1547760716-7304-1-git-send-email-zub@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