From 5470979585d81271d4338c2accfd5e71dafa4af6 Mon Sep 17 00:00:00 2001 From: Vivien Didelot Date: Thu, 1 Jun 2017 16:07:14 -0400 Subject: [PATCH] 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 Signed-off-by: Vivien Didelot Signed-off-by: David S. Miller --- net/dsa/tag_brcm.c | 11 ++++------- net/dsa/tag_dsa.c | 13 +++++-------- net/dsa/tag_edsa.c | 13 +++++-------- net/dsa/tag_mtk.c | 9 +++------ net/dsa/tag_qca.c | 11 ++++------- net/dsa/tag_trailer.c | 9 +++------ 6 files changed, 24 insertions(+), 42 deletions(-) diff --git a/net/dsa/tag_brcm.c b/net/dsa/tag_brcm.c index 9f204f1..635ecb6 100644 --- a/net/dsa/tag_brcm.c +++ b/net/dsa/tag_brcm.c @@ -104,27 +104,27 @@ static struct sk_buff *brcm_tag_rcv(struct sk_buff *skb, struct net_device *dev, ds = dst->cpu_dp->ds; if (unlikely(!pskb_may_pull(skb, BRCM_TAG_LEN))) - goto out_drop; + return NULL; /* skb->data points to the EtherType, the tag is right before it */ brcm_tag = skb->data - 2; /* The opcode should never be different than 0b000 */ if (unlikely((brcm_tag[0] >> BRCM_OPCODE_SHIFT) & BRCM_OPCODE_MASK)) - goto out_drop; + return NULL; /* We should never see a reserved reason code without knowing how to * handle it */ if (unlikely(brcm_tag[2] & BRCM_EG_RC_RSVD)) - goto out_drop; + return NULL; /* Locate which port this is coming from */ source_port = brcm_tag[3] & BRCM_EG_PID_MASK; /* Validate port against switch setup, either the port is totally */ if (source_port >= ds->num_ports || !ds->ports[source_port].netdev) - goto out_drop; + return NULL; /* Remove Broadcom tag and update checksum */ skb_pull_rcsum(skb, BRCM_TAG_LEN); @@ -137,9 +137,6 @@ static struct sk_buff *brcm_tag_rcv(struct sk_buff *skb, struct net_device *dev, skb->dev = ds->ports[source_port].netdev; return skb; - -out_drop: - return NULL; } const struct dsa_device_ops brcm_netdev_ops = { diff --git a/net/dsa/tag_dsa.c b/net/dsa/tag_dsa.c index 3b62a57..089c99c 100644 --- a/net/dsa/tag_dsa.c +++ b/net/dsa/tag_dsa.c @@ -79,7 +79,7 @@ static struct sk_buff *dsa_rcv(struct sk_buff *skb, struct net_device *dev, int source_port; if (unlikely(!pskb_may_pull(skb, DSA_HLEN))) - goto out_drop; + return NULL; /* * The ethertype field is part of the DSA header. @@ -90,7 +90,7 @@ static struct sk_buff *dsa_rcv(struct sk_buff *skb, struct net_device *dev, * Check that frame type is either TO_CPU or FORWARD. */ if ((dsa_header[0] & 0xc0) != 0x00 && (dsa_header[0] & 0xc0) != 0xc0) - goto out_drop; + return NULL; /* * Determine source device and port. @@ -103,14 +103,14 @@ static struct sk_buff *dsa_rcv(struct sk_buff *skb, struct net_device *dev, * port is a registered DSA port. */ if (source_device >= DSA_MAX_SWITCHES) - goto out_drop; + return NULL; ds = dst->ds[source_device]; if (!ds) - goto out_drop; + return NULL; if (source_port >= ds->num_ports || !ds->ports[source_port].netdev) - goto out_drop; + return NULL; /* * Convert the DSA header to an 802.1q header if the 'tagged' @@ -161,9 +161,6 @@ static struct sk_buff *dsa_rcv(struct sk_buff *skb, struct net_device *dev, skb->dev = ds->ports[source_port].netdev; return skb; - -out_drop: - return NULL; } const struct dsa_device_ops dsa_netdev_ops = { diff --git a/net/dsa/tag_edsa.c b/net/dsa/tag_edsa.c index f95cafd..a7eed1d 100644 --- a/net/dsa/tag_edsa.c +++ b/net/dsa/tag_edsa.c @@ -92,7 +92,7 @@ static struct sk_buff *edsa_rcv(struct sk_buff *skb, struct net_device *dev, int source_port; if (unlikely(!pskb_may_pull(skb, EDSA_HLEN))) - goto out_drop; + return NULL; /* * Skip the two null bytes after the ethertype. @@ -103,7 +103,7 @@ static struct sk_buff *edsa_rcv(struct sk_buff *skb, struct net_device *dev, * Check that frame type is either TO_CPU or FORWARD. */ if ((edsa_header[0] & 0xc0) != 0x00 && (edsa_header[0] & 0xc0) != 0xc0) - goto out_drop; + return NULL; /* * Determine source device and port. @@ -116,14 +116,14 @@ static struct sk_buff *edsa_rcv(struct sk_buff *skb, struct net_device *dev, * port is a registered DSA port. */ if (source_device >= DSA_MAX_SWITCHES) - goto out_drop; + return NULL; ds = dst->ds[source_device]; if (!ds) - goto out_drop; + return NULL; if (source_port >= ds->num_ports || !ds->ports[source_port].netdev) - goto out_drop; + return NULL; /* * If the 'tagged' bit is set, convert the DSA tag to a 802.1q @@ -180,9 +180,6 @@ static struct sk_buff *edsa_rcv(struct sk_buff *skb, struct net_device *dev, skb->dev = ds->ports[source_port].netdev; return skb; - -out_drop: - return NULL; } const struct dsa_device_ops edsa_netdev_ops = { diff --git a/net/dsa/tag_mtk.c b/net/dsa/tag_mtk.c index d1258e8..4b4aaf1 100644 --- a/net/dsa/tag_mtk.c +++ b/net/dsa/tag_mtk.c @@ -57,7 +57,7 @@ static struct sk_buff *mtk_tag_rcv(struct sk_buff *skb, struct net_device *dev, __be16 *phdr, hdr; if (unlikely(!pskb_may_pull(skb, MTK_HDR_LEN))) - goto out_drop; + return NULL; /* The MTK header is added by the switch between src addr * and ethertype at this point, skb->data points to 2 bytes @@ -79,19 +79,16 @@ static struct sk_buff *mtk_tag_rcv(struct sk_buff *skb, struct net_device *dev, */ ds = dst->ds[0]; if (!ds) - goto out_drop; + return NULL; /* Get source port information */ port = (hdr & MTK_HDR_RECV_SOURCE_PORT_MASK); if (!ds->ports[port].netdev) - goto out_drop; + return NULL; skb->dev = ds->ports[port].netdev; return skb; - -out_drop: - return NULL; } const struct dsa_device_ops mtk_netdev_ops = { diff --git a/net/dsa/tag_qca.c b/net/dsa/tag_qca.c index 2451007..44f545d 100644 --- a/net/dsa/tag_qca.c +++ b/net/dsa/tag_qca.c @@ -77,7 +77,7 @@ static struct sk_buff *qca_tag_rcv(struct sk_buff *skb, struct net_device *dev, __be16 *phdr, hdr; if (unlikely(!pskb_may_pull(skb, QCA_HDR_LEN))) - goto out_drop; + return NULL; /* The QCA header is added by the switch between src addr and Ethertype * At this point, skb->data points to ethertype so header should be @@ -89,7 +89,7 @@ static struct sk_buff *qca_tag_rcv(struct sk_buff *skb, struct net_device *dev, /* Make sure the version is correct */ ver = (hdr & QCA_HDR_RECV_VERSION_MASK) >> QCA_HDR_RECV_VERSION_S; if (unlikely(ver != QCA_HDR_VERSION)) - goto out_drop; + return NULL; /* Remove QCA tag and recalculate checksum */ skb_pull_rcsum(skb, QCA_HDR_LEN); @@ -101,20 +101,17 @@ static struct sk_buff *qca_tag_rcv(struct sk_buff *skb, struct net_device *dev, */ ds = dst->cpu_dp->ds; if (!ds) - goto out_drop; + return NULL; /* Get source port information */ port = (hdr & QCA_HDR_RECV_SOURCE_PORT_MASK); if (!ds->ports[port].netdev) - goto out_drop; + return NULL; /* Update skb & forward the frame accordingly */ skb->dev = ds->ports[port].netdev; return skb; - -out_drop: - return NULL; } const struct dsa_device_ops qca_netdev_ops = { diff --git a/net/dsa/tag_trailer.c b/net/dsa/tag_trailer.c index 7488ab2..ec729c0 100644 --- a/net/dsa/tag_trailer.c +++ b/net/dsa/tag_trailer.c @@ -70,25 +70,22 @@ static struct sk_buff *trailer_rcv(struct sk_buff *skb, struct net_device *dev, ds = dst->cpu_dp->ds; if (skb_linearize(skb)) - goto out_drop; + return NULL; trailer = skb_tail_pointer(skb) - 4; if (trailer[0] != 0x80 || (trailer[1] & 0xf8) != 0x00 || (trailer[2] & 0xef) != 0x00 || trailer[3] != 0x00) - goto out_drop; + return NULL; source_port = trailer[1] & 7; if (source_port >= ds->num_ports || !ds->ports[source_port].netdev) - goto out_drop; + return NULL; pskb_trim_rcsum(skb, skb->len - 4); skb->dev = ds->ports[source_port].netdev; return skb; - -out_drop: - return NULL; } const struct dsa_device_ops trailer_netdev_ops = { -- 2.7.4