linux-kernel - [PATCH 6/8] usbnet: smsc95xx: fix memcpy for accessing rx-data

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Message-Id: <20181012083405.19246-7-ben.dooks@codethink.co.uk>
Date:   Fri, 12 Oct 2018 09:34:03 +0100
From:   Ben Dooks <ben.dooks@...ethink.co.uk>
To:     netdev@...r.kernel.org
Cc:     oneukum@...e.com, davem@...emloft.net, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-kernel@...ts.codethink.co.uk,
        Ben Dooks <ben.dooks@...ethink.co.uk>
Subject: [PATCH 6/8] usbnet: smsc95xx: fix memcpy for accessing rx-data

Change the RX code to use get_unaligned_le32() instead of the combo
of memcpy and cpu_to_le32s(&var).

Signed-off-by: Ben Dooks <ben.dooks@...ethink.co.uk>
---
 drivers/net/usb/smsc95xx.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
index 8ce190da8be0..03c3c02b569c 100644
--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -618,9 +618,7 @@ static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
 		return;
 	}
 
-	memcpy(&intdata, urb->transfer_buffer, 4);
-	le32_to_cpus(&intdata);
-
+	intdata = get_unaligned_le32(urb->transfer_buffer);
 	netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 
 	if (intdata & INT_ENP_PHY_INT_)
@@ -1922,8 +1920,7 @@ static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
 		unsigned char *packet;
 		u16 size;
 
-		memcpy(&header, skb->data, sizeof(header));
-		le32_to_cpus(&header);
+		header = get_unaligned_le32(skb->data);
 		skb_pull(skb, 4 + NET_IP_ALIGN);
 		packet = skb->data;
 
-- 
2.19.1