linux-kernel - [PATCH 4.9 218/222] misc: cxl: Fix possible null pointer dereference

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Message-Id: <20191122100918.319643938@linuxfoundation.org>
Date:   Fri, 22 Nov 2019 11:29:18 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, zhong jiang <zhongjiang@...wei.com>,
        Andrew Donnellan <andrew.donnellan@....ibm.com>,
        Frederic Barrat <fbarrat@...ux.ibm.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.9 218/222] misc: cxl: Fix possible null pointer dereference

From: zhong jiang <zhongjiang@...wei.com>

[ Upstream commit 3dac3583bf1a61db6aaf31dfd752c677a4400afd ]

It is not safe to dereference an object before a null test. It is
not needed and just remove them. Ftrace can be used instead.

Signed-off-by: zhong jiang <zhongjiang@...wei.com>
Acked-by: Andrew Donnellan <andrew.donnellan@....ibm.com>
Acked-by: Frederic Barrat <fbarrat@...ux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/misc/cxl/guest.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/misc/cxl/guest.c b/drivers/misc/cxl/guest.c
index 3e102cd6ed914..d08509cd978a4 100644
--- a/drivers/misc/cxl/guest.c
+++ b/drivers/misc/cxl/guest.c
@@ -1026,8 +1026,6 @@ int cxl_guest_init_afu(struct cxl *adapter, int slice, struct device_node *afu_n
 
 void cxl_guest_remove_afu(struct cxl_afu *afu)
 {
-	pr_devel("in %s - AFU(%d)\n", __func__, afu->slice);
-
 	if (!afu)
 		return;
 
-- 
2.20.1