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Message-Id: <1371040811-8319-1-git-send-email-david.wiltshire@gmx.com>
Date: Wed, 12 Jun 2013 22:40:10 +1000
From: Dave Wiltshire <david.wiltshire@....com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
nsujir@...adcom.com, mchan@...adcom.com, rmody@...cade.com,
jcliburn@...il.com, chris.snook@...il.com,
jeffrey.t.kirsher@...el.com, bruce.w.allan@...el.com,
alexander.h.duyck@...el.com, cooldavid@...ldavid.org,
linux-driver@...gic.com, linux-wimax@...el.com,
wimax@...uxwimax.org, linux-wireless@...r.kernel.org,
viro@...iv.linux.org.uk, eparis@...hat.com, edumazet@...gle.com,
dev@...nvswitch.org, jhs@...atatu.com,
Dave Wiltshire <david.wiltshire@....com>
Subject: [PATCH 2/3] skbuff: skb_cow_head not used in some drivers.
There is a helper function skb_cow_head which checks if a skb needs to
be expanded. This was unused in some drivers. Fixing that leads to
cleaner code in the drivers.
Signed-off-by: Dave Wiltshire <david.wiltshire@....com>
---
drivers/net/ethernet/atheros/atl1c/atl1c_main.c | 8 ++------
drivers/net/ethernet/atheros/atl1e/atl1e_main.c | 8 ++------
drivers/net/ethernet/atheros/atlx/atl1.c | 8 ++------
drivers/net/ethernet/broadcom/tg3.c | 3 +--
drivers/net/ethernet/brocade/bna/bnad.c | 11 +++--------
drivers/net/ethernet/intel/e1000/e1000_main.c | 8 ++------
drivers/net/ethernet/intel/e1000e/netdev.c | 8 ++------
drivers/net/ethernet/intel/igb/igb_main.c | 7 ++-----
drivers/net/ethernet/intel/igbvf/netdev.c | 11 +++--------
drivers/net/ethernet/intel/ixgb/ixgb_main.c | 8 ++------
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 10 +++-------
drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 7 ++-----
drivers/net/ethernet/jme.c | 3 +--
drivers/net/ethernet/qlogic/qlge/qlge_main.c | 8 ++------
drivers/net/wimax/i2400m/netdev.c | 3 +--
15 files changed, 30 insertions(+), 81 deletions(-)
diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
index 786a874..8c69cda 100644
--- a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
+++ b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
@@ -1931,14 +1931,10 @@ static int atl1c_tso_csum(struct atl1c_adapter *adapter,
u8 hdr_len;
u32 real_len;
unsigned short offload_type;
- int err;
if (skb_is_gso(skb)) {
- if (skb_header_cloned(skb)) {
- err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
- if (unlikely(err))
- return -1;
- }
+ if (unlikely(skb_cow_head(skb, 0)))
+ return -1;
offload_type = skb_shinfo(skb)->gso_type;
if (offload_type & SKB_GSO_TCPV4) {
diff --git a/drivers/net/ethernet/atheros/atl1e/atl1e_main.c b/drivers/net/ethernet/atheros/atl1e/atl1e_main.c
index 895f537..ff10d03 100644
--- a/drivers/net/ethernet/atheros/atl1e/atl1e_main.c
+++ b/drivers/net/ethernet/atheros/atl1e/atl1e_main.c
@@ -1599,14 +1599,10 @@ static int atl1e_tso_csum(struct atl1e_adapter *adapter,
u8 hdr_len;
u32 real_len;
unsigned short offload_type;
- int err;
if (skb_is_gso(skb)) {
- if (skb_header_cloned(skb)) {
- err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
- if (unlikely(err))
- return -1;
- }
+ if (unlikely(skb_cow_head(skb, 0)))
+ return -1;
offload_type = skb_shinfo(skb)->gso_type;
if (offload_type & SKB_GSO_TCPV4) {
diff --git a/drivers/net/ethernet/atheros/atlx/atl1.c b/drivers/net/ethernet/atheros/atlx/atl1.c
index 538211d..da7169c 100644
--- a/drivers/net/ethernet/atheros/atlx/atl1.c
+++ b/drivers/net/ethernet/atheros/atlx/atl1.c
@@ -2115,14 +2115,10 @@ static int atl1_tso(struct atl1_adapter *adapter, struct sk_buff *skb,
{
u8 hdr_len, ip_off;
u32 real_len;
- int err;
if (skb_shinfo(skb)->gso_size) {
- if (skb_header_cloned(skb)) {
- err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
- if (unlikely(err))
- return -1;
- }
+ if (unlikely(skb_cow_head(skb, 0)))
+ return -1;
if (skb->protocol == htons(ETH_P_IP)) {
struct iphdr *iph = ip_hdr(skb);
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index 28a645f..6daf8f9 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -7803,8 +7803,7 @@ static netdev_tx_t tg3_start_xmit(struct sk_buff *skb, struct net_device *dev)
struct iphdr *iph;
u32 tcp_opt_len, hdr_len;
- if (skb_header_cloned(skb) &&
- pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
+ if (skb_cow_head(skb, 0))
goto drop;
iph = ip_hdr(skb);
diff --git a/drivers/net/ethernet/brocade/bna/bnad.c b/drivers/net/ethernet/brocade/bna/bnad.c
index b78e69e..ba5325a 100644
--- a/drivers/net/ethernet/brocade/bna/bnad.c
+++ b/drivers/net/ethernet/brocade/bna/bnad.c
@@ -2303,14 +2303,9 @@ bnad_mbox_irq_sync(struct bnad *bnad)
static int
bnad_tso_prepare(struct bnad *bnad, struct sk_buff *skb)
{
- int err;
-
- if (skb_header_cloned(skb)) {
- err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
- if (err) {
- BNAD_UPDATE_CTR(bnad, tso_err);
- return err;
- }
+ if (skb_cow_head(skb, 0)) {
+ BNAD_UPDATE_CTR(bnad, tso_err);
+ return -ENOMEM;
}
/*
diff --git a/drivers/net/ethernet/intel/e1000/e1000_main.c b/drivers/net/ethernet/intel/e1000/e1000_main.c
index 59ad007..828d850 100644
--- a/drivers/net/ethernet/intel/e1000/e1000_main.c
+++ b/drivers/net/ethernet/intel/e1000/e1000_main.c
@@ -2704,14 +2704,10 @@ static int e1000_tso(struct e1000_adapter *adapter,
u32 cmd_length = 0;
u16 ipcse = 0, tucse, mss;
u8 ipcss, ipcso, tucss, tucso, hdr_len;
- int err;
if (skb_is_gso(skb)) {
- if (skb_header_cloned(skb)) {
- err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
- if (err)
- return err;
- }
+ if (skb_cow_head(skb, 0))
+ return -ENOMEM;
hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
mss = skb_shinfo(skb)->gso_size;
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index 77f81cb..da3de16 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -5070,12 +5070,8 @@ static int e1000_tso(struct e1000_ring *tx_ring, struct sk_buff *skb)
if (!skb_is_gso(skb))
return 0;
- if (skb_header_cloned(skb)) {
- int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
-
- if (err)
- return err;
- }
+ if (skb_cow_head(skb, 0))
+ return -ENOMEM;
hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
mss = skb_shinfo(skb)->gso_size;
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 6a0c1b6..917cacb 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -4292,11 +4292,8 @@ static int igb_tso(struct igb_ring *tx_ring,
if (!skb_is_gso(skb))
return 0;
- if (skb_header_cloned(skb)) {
- int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
- if (err)
- return err;
- }
+ if (skb_cow_head(skb, 0))
+ return -ENOMEM;
/* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
type_tucmd = E1000_ADVTXD_TUCMD_L4T_TCP;
diff --git a/drivers/net/ethernet/intel/igbvf/netdev.c b/drivers/net/ethernet/intel/igbvf/netdev.c
index 93eb7ee..5be1dc2 100644
--- a/drivers/net/ethernet/intel/igbvf/netdev.c
+++ b/drivers/net/ethernet/intel/igbvf/netdev.c
@@ -1911,19 +1911,14 @@ static int igbvf_tso(struct igbvf_adapter *adapter,
{
struct e1000_adv_tx_context_desc *context_desc;
unsigned int i;
- int err;
struct igbvf_buffer *buffer_info;
u32 info = 0, tu_cmd = 0;
u32 mss_l4len_idx, l4len;
*hdr_len = 0;
- if (skb_header_cloned(skb)) {
- err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
- if (err) {
- dev_err(&adapter->pdev->dev,
- "igbvf_tso returning an error\n");
- return err;
- }
+ if (skb_cow_head(skb, 0)) {
+ dev_err(&adapter->pdev->dev, "igbvf_tso returning an error\n");
+ return -ENOMEM;
}
l4len = tcp_hdrlen(skb);
diff --git a/drivers/net/ethernet/intel/ixgb/ixgb_main.c b/drivers/net/ethernet/intel/ixgb/ixgb_main.c
index fce3e92..59e768e 100644
--- a/drivers/net/ethernet/intel/ixgb/ixgb_main.c
+++ b/drivers/net/ethernet/intel/ixgb/ixgb_main.c
@@ -1226,17 +1226,13 @@ ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
unsigned int i;
u8 ipcss, ipcso, tucss, tucso, hdr_len;
u16 ipcse, tucse, mss;
- int err;
if (likely(skb_is_gso(skb))) {
struct ixgb_buffer *buffer_info;
struct iphdr *iph;
- if (skb_header_cloned(skb)) {
- err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
- if (err)
- return err;
- }
+ if (skb_cow_head(skb, 0))
+ return -ENOMEM;
hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
mss = skb_shinfo(skb)->gso_size;
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 047ebaa..57a0c00 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -6060,11 +6060,8 @@ static int ixgbe_tso(struct ixgbe_ring *tx_ring,
if (!skb_is_gso(skb))
return 0;
- if (skb_header_cloned(skb)) {
- int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
- if (err)
- return err;
- }
+ if (skb_cow_head(skb, 0))
+ return -ENOMEM;
/* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
@@ -6609,8 +6606,7 @@ netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb,
IXGBE_TX_FLAGS_VLAN_PRIO_SHIFT;
if (tx_flags & IXGBE_TX_FLAGS_SW_VLAN) {
struct vlan_ethhdr *vhdr;
- if (skb_header_cloned(skb) &&
- pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
+ if (skb_cow_head(skb, 0))
goto out_drop;
vhdr = (struct vlan_ethhdr *)skb->data;
vhdr->h_vlan_TCI = htons(tx_flags >>
diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
index 1f5166a..088402e 100644
--- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
+++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
@@ -2726,11 +2726,8 @@ static int ixgbevf_tso(struct ixgbevf_ring *tx_ring,
if (!skb_is_gso(skb))
return 0;
- if (skb_header_cloned(skb)) {
- int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
- if (err)
- return err;
- }
+ if (skb_cow_head(skb, 0))
+ return -ENOMEM;
/* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
diff --git a/drivers/net/ethernet/jme.c b/drivers/net/ethernet/jme.c
index 7fbe6ab..7493db2 100644
--- a/drivers/net/ethernet/jme.c
+++ b/drivers/net/ethernet/jme.c
@@ -2057,8 +2057,7 @@ static int
jme_expand_header(struct jme_adapter *jme, struct sk_buff *skb)
{
if (unlikely(skb_shinfo(skb)->gso_size &&
- skb_header_cloned(skb) &&
- pskb_expand_head(skb, 0, 0, GFP_ATOMIC))) {
+ skb_cow_head(skb, 0))) {
dev_kfree_skb(skb);
return -1;
}
diff --git a/drivers/net/ethernet/qlogic/qlge/qlge_main.c b/drivers/net/ethernet/qlogic/qlge/qlge_main.c
index 2553cf4..ab7e177 100644
--- a/drivers/net/ethernet/qlogic/qlge/qlge_main.c
+++ b/drivers/net/ethernet/qlogic/qlge/qlge_main.c
@@ -2496,12 +2496,8 @@ static int ql_tso(struct sk_buff *skb, struct ob_mac_tso_iocb_req *mac_iocb_ptr)
{
if (skb_is_gso(skb)) {
- int err;
- if (skb_header_cloned(skb)) {
- err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
- if (err)
- return err;
- }
+ if (skb_cow_head(skb, 0))
+ return -ENOMEM;
mac_iocb_ptr->opcode = OPCODE_OB_MAC_TSO_IOCB;
mac_iocb_ptr->flags3 |= OB_MAC_TSO_IOCB_IC;
diff --git a/drivers/net/wimax/i2400m/netdev.c b/drivers/net/wimax/i2400m/netdev.c
index 4889613..a9970f1 100644
--- a/drivers/net/wimax/i2400m/netdev.c
+++ b/drivers/net/wimax/i2400m/netdev.c
@@ -374,8 +374,7 @@ netdev_tx_t i2400m_hard_start_xmit(struct sk_buff *skb,
d_fnstart(3, dev, "(skb %p net_dev %p)\n", skb, net_dev);
- if (skb_header_cloned(skb) &&
- pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
+ if (skb_cow_head(skb, 0))
goto drop;
if (i2400m->state == I2400M_SS_IDLE)
--
1.7.10.4
--
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