linux-kernel - [PATCH AUTOSEL 4.19 196/209] misc: cxl: Fix possible null pointer dereference

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Message-Id: <20191113015025.9685-196-sashal@kernel.org>
Date:   Tue, 12 Nov 2019 20:50:12 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     zhong jiang <zhongjiang@...wei.com>,
        Andrew Donnellan <andrew.donnellan@....ibm.com>,
        Frederic Barrat <fbarrat@...ux.ibm.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sasha Levin <sashal@...nel.org>, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH AUTOSEL 4.19 196/209] 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 b83a373e3a8dd..08f4a512afad2 100644
--- a/drivers/misc/cxl/guest.c
+++ b/drivers/misc/cxl/guest.c
@@ -1020,8 +1020,6 @@ 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