linux-kernel - [PATCH 06/16] block: sed-opal: unify error handling of responses

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Message-Id: <20190116225540.470186004E@linux.fjfi.cvut.cz>
Date:   Thu, 15 Nov 2018 21:33:33 +0100
From:   David Kozub <zub@...ux.fjfi.cvut.cz>
To:     Jens Axboe <axboe@...nel.dk>, Scott Bauer <scott.bauer@...el.com>,
        Jonathan Derrick <jonathan.derrick@...el.com>,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Jonas Rabenstein <jonas.rabenstein@...dium.uni-erlangen.de>
Subject: [PATCH 06/16] block: sed-opal: unify error handling of responses

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@...dium.uni-erlangen.de>
Signed-off-by: David Kozub <zub@...ux.fjfi.cvut.cz>
Signed-off-by: Jonas Rabenstein <jonas.rabenstein@...dium.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