6 files changed, 24 insertions, 22 deletions

diff --git a/drivers/net/stmmac/common.h b/drivers/net/stmmac/common.h
index 144f76fd3e39..66b9da0260fe 100644
--- a/drivers/net/stmmac/common.h
+++ b/drivers/net/stmmac/common.h
@@ -108,6 +108,7 @@ enum rx_frame_status { /* IPC status */
 	good_frame = 0,
 	discard_frame = 1,
 	csum_none = 2,
+	llc_snap = 4,
 };
 
 enum tx_dma_irq_status {
diff --git a/drivers/net/stmmac/dwmac1000.h b/drivers/net/stmmac/dwmac1000.h
index d8d0f3553770..8b20b19971cb 100644
--- a/drivers/net/stmmac/dwmac1000.h
+++ b/drivers/net/stmmac/dwmac1000.h
@@ -93,7 +93,7 @@ enum inter_frame_gap {
 #define GMAC_CONTROL_IPC	0x00000400 /* Checksum Offload */
 #define GMAC_CONTROL_DR		0x00000200 /* Disable Retry */
 #define GMAC_CONTROL_LUD	0x00000100 /* Link up/down */
-#define GMAC_CONTROL_ACS	0x00000080 /* Automatic Pad Stripping */
+#define GMAC_CONTROL_ACS	0x00000080 /* Automatic Pad/FCS Stripping */
 #define GMAC_CONTROL_DC		0x00000010 /* Deferral Check */
 #define GMAC_CONTROL_TE		0x00000008 /* Transmitter Enable */
 #define GMAC_CONTROL_RE		0x00000004 /* Receiver Enable */
diff --git a/drivers/net/stmmac/dwmac1000_core.c b/drivers/net/stmmac/dwmac1000_core.c
index 917b4e16923b..2b2f5c8caf1c 100644
--- a/drivers/net/stmmac/dwmac1000_core.c
+++ b/drivers/net/stmmac/dwmac1000_core.c
@@ -220,6 +220,8 @@ struct mac_device_info *dwmac1000_setup(unsigned long ioaddr)
 		((uid & 0x0000ff00) >> 8), (uid & 0x000000ff));
 
 	mac = kzalloc(sizeof(const struct mac_device_info), GFP_KERNEL);
+	if (!mac)
+		return NULL;
 
 	mac->mac = &dwmac1000_ops;
 	mac->dma = &dwmac1000_dma_ops;
diff --git a/drivers/net/stmmac/dwmac100_core.c b/drivers/net/stmmac/dwmac100_core.c
index 6f270a0e151a..2fb165fa2ba0 100644
--- a/drivers/net/stmmac/dwmac100_core.c
+++ b/drivers/net/stmmac/dwmac100_core.c
@@ -179,6 +179,8 @@ struct mac_device_info *dwmac100_setup(unsigned long ioaddr)
 	struct mac_device_info *mac;
 
 	mac = kzalloc(sizeof(const struct mac_device_info), GFP_KERNEL);
+	if (!mac)
+		return NULL;
 
 	pr_info("\tDWMAC100\n");
 
diff --git a/drivers/net/stmmac/enh_desc.c b/drivers/net/stmmac/enh_desc.c
index 3c18ebece043..f612f986a7e1 100644
--- a/drivers/net/stmmac/enh_desc.c
+++ b/drivers/net/stmmac/enh_desc.c
@@ -123,7 +123,7 @@ static int enh_desc_coe_rdes0(int ipc_err, int type, int payload_err)
 	 */
 	if (status == 0x0) {
 		CHIP_DBG(KERN_INFO "RX Des0 status: IEEE 802.3 Type frame.\n");
-		ret = good_frame;
+		ret = llc_snap;
 	} else if (status == 0x4) {
 		CHIP_DBG(KERN_INFO "RX Des0 status: IPv4/6 No CSUM errorS.\n");
 		ret = good_frame;
diff --git a/drivers/net/stmmac/stmmac_main.c b/drivers/net/stmmac/stmmac_main.c
index a31d580f306d..bbb7951b9c4c 100644
--- a/drivers/net/stmmac/stmmac_main.c
+++ b/drivers/net/stmmac/stmmac_main.c
@@ -829,7 +829,6 @@ static int stmmac_open(struct net_device *dev)
 	 * In case of failure continue without timer. */
 	if (unlikely((stmmac_open_ext_timer(dev, priv->tm)) < 0)) {
 		pr_warning("stmmaceth: cannot attach the external timer.\n");
-		tmrate = 0;
 		priv->tm->freq = 0;
 		priv->tm->timer_start = stmmac_no_timer_started;
 		priv->tm->timer_stop = stmmac_no_timer_stopped;
@@ -1217,9 +1216,13 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit)
 			priv->dev->stats.rx_errors++;
 		else {
 			struct sk_buff *skb;
-			/* Length should omit the CRC */
-			int frame_len = priv->hw->desc->get_rx_frame_len(p) - 4;
+			int frame_len;
 
+			frame_len = priv->hw->desc->get_rx_frame_len(p);
+			/* ACS is set; GMAC core strips PAD/FCS for IEEE 802.3
+			 * Type frames (LLC/LLC-SNAP) */
+			if (unlikely(status != llc_snap))
+				frame_len -= ETH_FCS_LEN;
 #ifdef STMMAC_RX_DEBUG
 			if (frame_len > ETH_FRAME_LEN)
 				pr_debug("\tRX frame size %d, COE status: %d\n",
@@ -1437,24 +1440,18 @@ static void stmmac_poll_controller(struct net_device *dev)
 static int stmmac_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 {
 	struct stmmac_priv *priv = netdev_priv(dev);
-	int ret = -EOPNOTSUPP;
+	int ret;
 
 	if (!netif_running(dev))
 		return -EINVAL;
 
-	switch (cmd) {
-	case SIOCGMIIPHY:
-	case SIOCGMIIREG:
-	case SIOCSMIIREG:
-		if (!priv->phydev)
-			return -EINVAL;
-
-		spin_lock(&priv->lock);
-		ret = phy_mii_ioctl(priv->phydev, if_mii(rq), cmd);
-		spin_unlock(&priv->lock);
-	default:
-		break;
-	}
+	if (!priv->phydev)
+		return -EINVAL;
+
+	spin_lock(&priv->lock);
+	ret = phy_mii_ioctl(priv->phydev, rq, cmd);
+	spin_unlock(&priv->lock);
+
 	return ret;
 }
 
@@ -1564,15 +1561,15 @@ static int stmmac_mac_device_setup(struct net_device *dev)
 	else
 		device = dwmac100_setup(ioaddr);
 
+	if (!device)
+		return -ENOMEM;
+
 	if (priv->enh_desc) {
 		device->desc = &enh_desc_ops;
 		pr_info("\tEnhanced descriptor structure\n");
 	} else
 		device->desc = &ndesc_ops;
 
-	if (!device)
-		return -ENOMEM;
-
 	priv->hw = device;
 
 	priv->wolenabled = priv->hw->pmt;	/* PMT supported */