linux-kernel - [PATCH] cxl/core/port: fix NULL but dereferenced coccicheck error

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Message-Id: <20220307094158.404882-1-wanjiabing@vivo.com>
Date:   Mon,  7 Mar 2022 17:41:48 +0800
From:   Wan Jiabing <wanjiabing@...o.com>
To:     Alison Schofield <alison.schofield@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Ira Weiny <ira.weiny@...el.com>,
        Ben Widawsky <ben.widawsky@...el.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        linux-cxl@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     kael_w@...com, Wan Jiabing <wanjiabing@...o.com>
Subject: [PATCH] cxl/core/port: fix NULL but dereferenced coccicheck error

Fix the following coccicheck warning:
./drivers/cxl/core/port.c:913:21-24: ERROR: port is NULL but dereferenced.

Signed-off-by: Wan Jiabing <wanjiabing@...o.com>
---
 drivers/cxl/core/port.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/cxl/core/port.c b/drivers/cxl/core/port.c
index d29eb2abdbc2..3349e9f7b89e 100644
--- a/drivers/cxl/core/port.c
+++ b/drivers/cxl/core/port.c
@@ -909,7 +909,10 @@ static void cxl_detach_ep(void *data)
 			break;
 
 		port = find_cxl_port(dport_dev);
-		if (!port || is_cxl_root(port)) {
+		if (!port)
+			continue;
+
+		if (is_cxl_root(port)) {
 			put_device(&port->dev);
 			continue;
 		}
-- 
2.35.1