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net: dsa: remove out_drop label in taggers rcv
Many rcv functions from net/dsa/tag_*.c have a useless out_drop goto label which simply returns NULL. Kill it in favor of the obvious. Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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717ffbfb28
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5470979585
@ -104,27 +104,27 @@ static struct sk_buff *brcm_tag_rcv(struct sk_buff *skb, struct net_device *dev,
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ds = dst->cpu_dp->ds;
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if (unlikely(!pskb_may_pull(skb, BRCM_TAG_LEN)))
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goto out_drop;
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return NULL;
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/* skb->data points to the EtherType, the tag is right before it */
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brcm_tag = skb->data - 2;
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/* The opcode should never be different than 0b000 */
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if (unlikely((brcm_tag[0] >> BRCM_OPCODE_SHIFT) & BRCM_OPCODE_MASK))
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goto out_drop;
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return NULL;
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/* We should never see a reserved reason code without knowing how to
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* handle it
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*/
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if (unlikely(brcm_tag[2] & BRCM_EG_RC_RSVD))
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goto out_drop;
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return NULL;
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/* Locate which port this is coming from */
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source_port = brcm_tag[3] & BRCM_EG_PID_MASK;
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/* Validate port against switch setup, either the port is totally */
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if (source_port >= ds->num_ports || !ds->ports[source_port].netdev)
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goto out_drop;
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return NULL;
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/* Remove Broadcom tag and update checksum */
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skb_pull_rcsum(skb, BRCM_TAG_LEN);
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@ -137,9 +137,6 @@ static struct sk_buff *brcm_tag_rcv(struct sk_buff *skb, struct net_device *dev,
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skb->dev = ds->ports[source_port].netdev;
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return skb;
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out_drop:
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return NULL;
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}
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const struct dsa_device_ops brcm_netdev_ops = {
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@ -79,7 +79,7 @@ static struct sk_buff *dsa_rcv(struct sk_buff *skb, struct net_device *dev,
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int source_port;
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if (unlikely(!pskb_may_pull(skb, DSA_HLEN)))
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goto out_drop;
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return NULL;
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/*
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* The ethertype field is part of the DSA header.
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@ -90,7 +90,7 @@ static struct sk_buff *dsa_rcv(struct sk_buff *skb, struct net_device *dev,
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* Check that frame type is either TO_CPU or FORWARD.
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*/
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if ((dsa_header[0] & 0xc0) != 0x00 && (dsa_header[0] & 0xc0) != 0xc0)
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goto out_drop;
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return NULL;
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/*
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* Determine source device and port.
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@ -103,14 +103,14 @@ static struct sk_buff *dsa_rcv(struct sk_buff *skb, struct net_device *dev,
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* port is a registered DSA port.
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*/
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if (source_device >= DSA_MAX_SWITCHES)
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goto out_drop;
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return NULL;
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ds = dst->ds[source_device];
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if (!ds)
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goto out_drop;
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return NULL;
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if (source_port >= ds->num_ports || !ds->ports[source_port].netdev)
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goto out_drop;
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return NULL;
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/*
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* Convert the DSA header to an 802.1q header if the 'tagged'
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@ -161,9 +161,6 @@ static struct sk_buff *dsa_rcv(struct sk_buff *skb, struct net_device *dev,
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skb->dev = ds->ports[source_port].netdev;
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return skb;
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out_drop:
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return NULL;
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}
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const struct dsa_device_ops dsa_netdev_ops = {
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@ -92,7 +92,7 @@ static struct sk_buff *edsa_rcv(struct sk_buff *skb, struct net_device *dev,
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int source_port;
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if (unlikely(!pskb_may_pull(skb, EDSA_HLEN)))
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goto out_drop;
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return NULL;
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/*
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* Skip the two null bytes after the ethertype.
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@ -103,7 +103,7 @@ static struct sk_buff *edsa_rcv(struct sk_buff *skb, struct net_device *dev,
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* Check that frame type is either TO_CPU or FORWARD.
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*/
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if ((edsa_header[0] & 0xc0) != 0x00 && (edsa_header[0] & 0xc0) != 0xc0)
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goto out_drop;
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return NULL;
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/*
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* Determine source device and port.
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@ -116,14 +116,14 @@ static struct sk_buff *edsa_rcv(struct sk_buff *skb, struct net_device *dev,
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* port is a registered DSA port.
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*/
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if (source_device >= DSA_MAX_SWITCHES)
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goto out_drop;
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return NULL;
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ds = dst->ds[source_device];
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if (!ds)
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goto out_drop;
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return NULL;
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if (source_port >= ds->num_ports || !ds->ports[source_port].netdev)
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goto out_drop;
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return NULL;
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/*
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* If the 'tagged' bit is set, convert the DSA tag to a 802.1q
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@ -180,9 +180,6 @@ static struct sk_buff *edsa_rcv(struct sk_buff *skb, struct net_device *dev,
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skb->dev = ds->ports[source_port].netdev;
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return skb;
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out_drop:
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return NULL;
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}
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const struct dsa_device_ops edsa_netdev_ops = {
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@ -57,7 +57,7 @@ static struct sk_buff *mtk_tag_rcv(struct sk_buff *skb, struct net_device *dev,
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__be16 *phdr, hdr;
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if (unlikely(!pskb_may_pull(skb, MTK_HDR_LEN)))
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goto out_drop;
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return NULL;
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/* The MTK header is added by the switch between src addr
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* and ethertype at this point, skb->data points to 2 bytes
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@ -79,19 +79,16 @@ static struct sk_buff *mtk_tag_rcv(struct sk_buff *skb, struct net_device *dev,
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*/
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ds = dst->ds[0];
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if (!ds)
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goto out_drop;
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return NULL;
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/* Get source port information */
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port = (hdr & MTK_HDR_RECV_SOURCE_PORT_MASK);
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if (!ds->ports[port].netdev)
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goto out_drop;
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return NULL;
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skb->dev = ds->ports[port].netdev;
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return skb;
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out_drop:
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return NULL;
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}
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const struct dsa_device_ops mtk_netdev_ops = {
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@ -77,7 +77,7 @@ static struct sk_buff *qca_tag_rcv(struct sk_buff *skb, struct net_device *dev,
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__be16 *phdr, hdr;
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if (unlikely(!pskb_may_pull(skb, QCA_HDR_LEN)))
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goto out_drop;
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return NULL;
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/* The QCA header is added by the switch between src addr and Ethertype
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* At this point, skb->data points to ethertype so header should be
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@ -89,7 +89,7 @@ static struct sk_buff *qca_tag_rcv(struct sk_buff *skb, struct net_device *dev,
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/* Make sure the version is correct */
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ver = (hdr & QCA_HDR_RECV_VERSION_MASK) >> QCA_HDR_RECV_VERSION_S;
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if (unlikely(ver != QCA_HDR_VERSION))
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goto out_drop;
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return NULL;
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/* Remove QCA tag and recalculate checksum */
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skb_pull_rcsum(skb, QCA_HDR_LEN);
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@ -101,20 +101,17 @@ static struct sk_buff *qca_tag_rcv(struct sk_buff *skb, struct net_device *dev,
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*/
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ds = dst->cpu_dp->ds;
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if (!ds)
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goto out_drop;
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return NULL;
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/* Get source port information */
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port = (hdr & QCA_HDR_RECV_SOURCE_PORT_MASK);
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if (!ds->ports[port].netdev)
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goto out_drop;
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return NULL;
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/* Update skb & forward the frame accordingly */
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skb->dev = ds->ports[port].netdev;
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return skb;
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out_drop:
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return NULL;
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}
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const struct dsa_device_ops qca_netdev_ops = {
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@ -70,25 +70,22 @@ static struct sk_buff *trailer_rcv(struct sk_buff *skb, struct net_device *dev,
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ds = dst->cpu_dp->ds;
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if (skb_linearize(skb))
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goto out_drop;
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return NULL;
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trailer = skb_tail_pointer(skb) - 4;
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if (trailer[0] != 0x80 || (trailer[1] & 0xf8) != 0x00 ||
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(trailer[2] & 0xef) != 0x00 || trailer[3] != 0x00)
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goto out_drop;
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return NULL;
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source_port = trailer[1] & 7;
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if (source_port >= ds->num_ports || !ds->ports[source_port].netdev)
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goto out_drop;
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return NULL;
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pskb_trim_rcsum(skb, skb->len - 4);
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skb->dev = ds->ports[source_port].netdev;
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return skb;
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out_drop:
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return NULL;
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}
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const struct dsa_device_ops trailer_netdev_ops = {
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