diff options
| author | Andreas Schultz <aschultz@tpip.net> | 2017-01-26 18:21:48 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-01-29 21:54:00 +0300 |
| commit | 10931923b5a5624d254ec3c8db6970f63b277cac (patch) | |
| tree | 0f965c10ef0fea1e736ea917dfa9e6ef98496c05 /drivers/net/gtp.c | |
| parent | 4e8f2fc1a55d543717efb70e170b09e773d0542b (diff) | |
| download | linux-10931923b5a5624d254ec3c8db6970f63b277cac.tar.xz | |
gtp: remove unnecessary rcu_read_lock
The rcu read lock is hold by default in the ip input path. There
is no need to hold it twice in the socket recv decapsulate code path.
Signed-off-by: Andreas Schultz <aschultz@tpip.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/gtp.c')
| -rw-r--r-- | drivers/net/gtp.c | 24 |
1 files changed, 4 insertions, 20 deletions
diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c index 99d3df788ce8..e11a1ead3228 100644 --- a/drivers/net/gtp.c +++ b/drivers/net/gtp.c @@ -183,7 +183,6 @@ static int gtp0_udp_encap_recv(struct gtp_dev *gtp, struct sk_buff *skb, sizeof(struct gtp0_header); struct gtp0_header *gtp0; struct pdp_ctx *pctx; - int ret = 0; if (!pskb_may_pull(skb, hdrlen)) return -1; @@ -196,26 +195,19 @@ static int gtp0_udp_encap_recv(struct gtp_dev *gtp, struct sk_buff *skb, if (gtp0->type != GTP_TPDU) return 1; - rcu_read_lock(); pctx = gtp0_pdp_find(gtp, be64_to_cpu(gtp0->tid)); if (!pctx) { netdev_dbg(gtp->dev, "No PDP ctx to decap skb=%p\n", skb); - ret = -1; - goto out_rcu; + return -1; } if (!gtp_check_src_ms(skb, pctx, hdrlen)) { netdev_dbg(gtp->dev, "No PDP ctx for this MS\n"); - ret = -1; - goto out_rcu; + return -1; } - rcu_read_unlock(); /* Get rid of the GTP + UDP headers. */ return iptunnel_pull_header(skb, hdrlen, skb->protocol, xnet); -out_rcu: - rcu_read_unlock(); - return ret; } static int gtp1u_udp_encap_recv(struct gtp_dev *gtp, struct sk_buff *skb, @@ -225,7 +217,6 @@ static int gtp1u_udp_encap_recv(struct gtp_dev *gtp, struct sk_buff *skb, sizeof(struct gtp1_header); struct gtp1_header *gtp1; struct pdp_ctx *pctx; - int ret = 0; if (!pskb_may_pull(skb, hdrlen)) return -1; @@ -253,26 +244,19 @@ static int gtp1u_udp_encap_recv(struct gtp_dev *gtp, struct sk_buff *skb, gtp1 = (struct gtp1_header *)(skb->data + sizeof(struct udphdr)); - rcu_read_lock(); pctx = gtp1_pdp_find(gtp, ntohl(gtp1->tid)); if (!pctx) { netdev_dbg(gtp->dev, "No PDP ctx to decap skb=%p\n", skb); - ret = -1; - goto out_rcu; + return -1; } if (!gtp_check_src_ms(skb, pctx, hdrlen)) { netdev_dbg(gtp->dev, "No PDP ctx for this MS\n"); - ret = -1; - goto out_rcu; + return -1; } - rcu_read_unlock(); /* Get rid of the GTP + UDP headers. */ return iptunnel_pull_header(skb, hdrlen, skb->protocol, xnet); -out_rcu: - rcu_read_unlock(); - return ret; } static void gtp_encap_disable(struct gtp_dev *gtp) |