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[82.50.51.252]) by smtp.gmail.com with ESMTPSA id xa17-20020a170907b9d100b009b913aa7cdasm9741317ejc.92.2023.10.25.03.57.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 25 Oct 2023 03:57:29 -0700 (PDT) From: Dario Binacchi To: linux-kernel@vger.kernel.org Cc: Dario Binacchi , Jens Axboe , linux-block@vger.kernel.org Subject: [PATCH] pktcdvd: fix error checking for debugfs_create_dir() Date: Wed, 25 Oct 2023 12:57:12 +0200 Message-ID: <20231025105725.2033975-1-dario.binacchi@amarulasolutions.com> X-Mailer: git-send-email 2.42.0 MIME-Version: 1.0 X-Spam-Status: No, score=-0.8 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on agentk.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (agentk.vger.email [0.0.0.0]); Wed, 25 Oct 2023 03:57:47 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1780724761240416253 X-GMAIL-MSGID: 1780724761240416253 The return value of debugfs_create_dir() should be checked using the IS_ERR() function. Signed-off-by: Dario Binacchi --- drivers/block/pktcdvd.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c index a1428538bda5..6a9decb04ac1 100644 --- a/drivers/block/pktcdvd.c +++ b/drivers/block/pktcdvd.c @@ -497,7 +497,7 @@ static void pkt_debugfs_dev_new(struct pktcdvd_device *pd) if (!pkt_debugfs_root) return; pd->dfs_d_root = debugfs_create_dir(pd->disk->disk_name, pkt_debugfs_root); - if (!pd->dfs_d_root) + if (IS_ERR(pd->dfs_d_root)) return; pd->dfs_f_info = debugfs_create_file("info", 0444, pd->dfs_d_root, @@ -517,6 +517,8 @@ static void pkt_debugfs_dev_remove(struct pktcdvd_device *pd) static void pkt_debugfs_init(void) { pkt_debugfs_root = debugfs_create_dir(DRIVER_NAME, NULL); + if (IS_ERR(pkt_debugfs_root)) + pkt_debugfs_root = NULL; } static void pkt_debugfs_cleanup(void)