linux-kernel - [PATCH 4.9 072/310] net/wan/fsl_ucc_hdlc: fix unitialized variable warnings

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Date:   Wed, 11 Apr 2018 20:33:31 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Holger Brunck <holger.brunck@...mile.com>,
        Zhao Qiang <qiang.zhao@....com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.9 072/310] net/wan/fsl_ucc_hdlc: fix unitialized variable warnings

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Holger Brunck <holger.brunck@...mile.com>


[ Upstream commit 66bb144bd9096dd5268ef736ba769b8b6f4ef100 ]

This fixes the following compiler warnings:
drivers/net/wan/fsl_ucc_hdlc.c: In function 'ucc_hdlc_poll':
warning: 'skb' may be used uninitialized in this function
[-Wmaybe-uninitialized]
  skb->mac_header = skb->data - skb->head;

and

drivers/net/wan/fsl_ucc_hdlc.c: In function 'ucc_hdlc_probe':
drivers/net/wan/fsl_ucc_hdlc.c:1127:3: warning: 'utdm' may be used
uninitialized in this function [-Wmaybe-uninitialized]
   kfree(utdm);

Signed-off-by: Holger Brunck <holger.brunck@...mile.com>
Cc: Zhao Qiang <qiang.zhao@....com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/wan/fsl_ucc_hdlc.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/net/wan/fsl_ucc_hdlc.c
+++ b/drivers/net/wan/fsl_ucc_hdlc.c
@@ -454,7 +454,7 @@ static int hdlc_tx_done(struct ucc_hdlc_
 static int hdlc_rx_done(struct ucc_hdlc_private *priv, int rx_work_limit)
 {
 	struct net_device *dev = priv->ndev;
-	struct sk_buff *skb;
+	struct sk_buff *skb = NULL;
 	hdlc_device *hdlc = dev_to_hdlc(dev);
 	struct qe_bd *bd;
 	u32 bd_status;
@@ -1002,7 +1002,7 @@ static int ucc_hdlc_probe(struct platfor
 	struct device_node *np = pdev->dev.of_node;
 	struct ucc_hdlc_private *uhdlc_priv = NULL;
 	struct ucc_tdm_info *ut_info;
-	struct ucc_tdm *utdm;
+	struct ucc_tdm *utdm = NULL;
 	struct resource res;
 	struct net_device *dev;
 	hdlc_device *hdlc;