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Date: Mon, 07 Jan 2008 21:39:07 -0800 (PST)
From: David Miller <davem@...emloft.net>
To: netdev@...r.kernel.org
Subject: [PATCH 3/7]: [NET]: Do not check netif_running() and carrier state
in ->poll()
[NET]: Do not check netif_running() and carrier state in ->poll()
Drivers do this to try to break out of the ->poll()'ing loop
when the device is being brought administratively down.
Now that we have a napi_disable() "pending" state we are going
to solve that problem generically.
Signed-off-by: David S. Miller <davem@...emloft.net>
---
drivers/net/e100.c | 2 +-
drivers/net/e1000/e1000_main.c | 8 +-------
drivers/net/e1000e/netdev.c | 8 +-------
drivers/net/epic100.c | 2 +-
drivers/net/fec_8xx/fec_main.c | 5 -----
drivers/net/fs_enet/fs_enet-main.c | 3 ---
drivers/net/ixgb/ixgb_main.c | 2 +-
drivers/net/ixgbe/ixgbe_main.c | 8 +-------
drivers/net/ixp2000/ixpdev.c | 2 --
drivers/net/myri10ge/myri10ge.c | 2 +-
drivers/net/natsemi.c | 2 +-
drivers/net/qla3xxx.c | 7 +------
drivers/net/s2io.c | 3 ---
drivers/net/tulip/interrupt.c | 5 -----
drivers/net/xen-netfront.c | 5 -----
15 files changed, 9 insertions(+), 55 deletions(-)
diff --git a/drivers/net/e100.c b/drivers/net/e100.c
index 2b06e4b..68316f1 100644
--- a/drivers/net/e100.c
+++ b/drivers/net/e100.c
@@ -1997,7 +1997,7 @@ static int e100_poll(struct napi_struct *napi, int budget)
tx_cleaned = e100_tx_clean(nic);
/* If no Rx and Tx cleanup work was done, exit polling mode. */
- if((!tx_cleaned && (work_done == 0)) || !netif_running(netdev)) {
+ if((!tx_cleaned && (work_done == 0))) {
netif_rx_complete(netdev, napi);
e100_enable_irq(nic);
}
diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 4f37506..9de7144 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -3924,10 +3924,6 @@ e1000_clean(struct napi_struct *napi, int budget)
/* Must NOT use netdev_priv macro here. */
adapter = poll_dev->priv;
- /* Keep link state information with original netdev */
- if (!netif_carrier_ok(poll_dev))
- goto quit_polling;
-
/* e1000_clean is called per-cpu. This lock protects
* tx_ring[0] from being cleaned by multiple cpus
* simultaneously. A failure obtaining the lock means
@@ -3942,9 +3938,7 @@ e1000_clean(struct napi_struct *napi, int budget)
&work_done, budget);
/* If no Tx and not enough Rx work done, exit the polling mode */
- if ((!tx_cleaned && (work_done == 0)) ||
- !netif_running(poll_dev)) {
-quit_polling:
+ if ((!tx_cleaned && (work_done == 0))) {
if (likely(adapter->itr_setting & 3))
e1000_set_itr(adapter);
netif_rx_complete(poll_dev, napi);
diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c
index 4fd2e23..dd9698c 100644
--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -1389,10 +1389,6 @@ static int e1000_clean(struct napi_struct *napi, int budget)
/* Must NOT use netdev_priv macro here. */
adapter = poll_dev->priv;
- /* Keep link state information with original netdev */
- if (!netif_carrier_ok(poll_dev))
- goto quit_polling;
-
/* e1000_clean is called per-cpu. This lock protects
* tx_ring from being cleaned by multiple cpus
* simultaneously. A failure obtaining the lock means
@@ -1405,9 +1401,7 @@ static int e1000_clean(struct napi_struct *napi, int budget)
adapter->clean_rx(adapter, &work_done, budget);
/* If no Tx and not enough Rx work done, exit the polling mode */
- if ((!tx_cleaned && (work_done < budget)) ||
- !netif_running(poll_dev)) {
-quit_polling:
+ if ((!tx_cleaned && (work_done < budget))) {
if (adapter->itr_setting & 3)
e1000_set_itr(adapter);
netif_rx_complete(poll_dev, napi);
diff --git a/drivers/net/epic100.c b/drivers/net/epic100.c
index ecdd3fc..0b365b8 100644
--- a/drivers/net/epic100.c
+++ b/drivers/net/epic100.c
@@ -1273,7 +1273,7 @@ rx_action:
epic_rx_err(dev, ep);
- if (netif_running(dev) && (work_done < budget)) {
+ if (work_done < budget) {
unsigned long flags;
int more;
diff --git a/drivers/net/fec_8xx/fec_main.c b/drivers/net/fec_8xx/fec_main.c
index 8d2904f..ab9637a 100644
--- a/drivers/net/fec_8xx/fec_main.c
+++ b/drivers/net/fec_8xx/fec_main.c
@@ -476,11 +476,6 @@ static int fec_enet_rx_common(struct fec_enet_private *ep,
__u16 pkt_len, sc;
int curidx;
- if (fpi->use_napi) {
- if (!netif_running(dev))
- return 0;
- }
-
/*
* First, grab all of the stats for the incoming packet.
* These get messed up if we get called due to a busy condition.
diff --git a/drivers/net/fs_enet/fs_enet-main.c b/drivers/net/fs_enet/fs_enet-main.c
index f2a4d39..3e1a57a 100644
--- a/drivers/net/fs_enet/fs_enet-main.c
+++ b/drivers/net/fs_enet/fs_enet-main.c
@@ -96,9 +96,6 @@ static int fs_enet_rx_napi(struct napi_struct *napi, int budget)
u16 pkt_len, sc;
int curidx;
- if (!netif_running(dev))
- return 0;
-
/*
* First, grab all of the stats for the incoming packet.
* These get messed up if we get called due to a busy condition.
diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c
index bf9085f..a8bef52 100644
--- a/drivers/net/ixgb/ixgb_main.c
+++ b/drivers/net/ixgb/ixgb_main.c
@@ -1794,7 +1794,7 @@ ixgb_clean(struct napi_struct *napi, int budget)
ixgb_clean_rx_irq(adapter, &work_done, budget);
/* if no Tx and not enough Rx work done, exit the polling mode */
- if((!tx_cleaned && (work_done == 0)) || !netif_running(netdev)) {
+ if((!tx_cleaned && (work_done == 0))) {
netif_rx_complete(netdev, napi);
ixgb_irq_enable(adapter);
}
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 00bc525..7c31930 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -1470,19 +1470,13 @@ static int ixgbe_clean(struct napi_struct *napi, int budget)
struct net_device *netdev = adapter->netdev;
int tx_cleaned = 0, work_done = 0;
- /* Keep link state information with original netdev */
- if (!netif_carrier_ok(adapter->netdev))
- goto quit_polling;
-
/* In non-MSIX case, there is no multi-Tx/Rx queue */
tx_cleaned = ixgbe_clean_tx_irq(adapter, adapter->tx_ring);
ixgbe_clean_rx_irq(adapter, &adapter->rx_ring[0], &work_done,
budget);
/* If no Tx and not enough Rx work done, exit the polling mode */
- if ((!tx_cleaned && (work_done < budget)) ||
- !netif_running(adapter->netdev)) {
-quit_polling:
+ if ((!tx_cleaned && (work_done < budget))) {
netif_rx_complete(netdev, napi);
ixgbe_irq_enable(adapter);
}
diff --git a/drivers/net/ixp2000/ixpdev.c b/drivers/net/ixp2000/ixpdev.c
index 6c0dd49..484cb2b 100644
--- a/drivers/net/ixp2000/ixpdev.c
+++ b/drivers/net/ixp2000/ixpdev.c
@@ -135,8 +135,6 @@ static int ixpdev_poll(struct napi_struct *napi, int budget)
struct net_device *dev = ip->dev;
int rx;
- /* @@@ Have to stop polling when nds[0] is administratively
- * downed while we are polling. */
rx = 0;
do {
ixp2000_reg_write(IXP2000_IRQ_THD_RAW_STATUS_A_0, 0x00ff);
diff --git a/drivers/net/myri10ge/myri10ge.c b/drivers/net/myri10ge/myri10ge.c
index 8def865..c90958f 100644
--- a/drivers/net/myri10ge/myri10ge.c
+++ b/drivers/net/myri10ge/myri10ge.c
@@ -1239,7 +1239,7 @@ static int myri10ge_poll(struct napi_struct *napi, int budget)
/* process as many rx events as NAPI will allow */
work_done = myri10ge_clean_rx_done(mgp, budget);
- if (work_done < budget || !netif_running(netdev)) {
+ if (work_done < budget) {
netif_rx_complete(netdev, napi);
put_be32(htonl(3), mgp->irq_claim);
}
diff --git a/drivers/net/natsemi.c b/drivers/net/natsemi.c
index 87cde06..c329a4f 100644
--- a/drivers/net/natsemi.c
+++ b/drivers/net/natsemi.c
@@ -2266,7 +2266,7 @@ static int natsemi_poll(struct napi_struct *napi, int budget)
/* Reenable interrupts providing nothing is trying to shut
* the chip down. */
spin_lock(&np->lock);
- if (!np->hands_off && netif_running(dev))
+ if (!np->hands_off)
natsemi_irq_enable(dev);
spin_unlock(&np->lock);
diff --git a/drivers/net/qla3xxx.c b/drivers/net/qla3xxx.c
index a579111..cf0774d 100644
--- a/drivers/net/qla3xxx.c
+++ b/drivers/net/qla3xxx.c
@@ -2320,14 +2320,9 @@ static int ql_poll(struct napi_struct *napi, int budget)
unsigned long hw_flags;
struct ql3xxx_port_registers __iomem *port_regs = qdev->mem_map_registers;
- if (!netif_carrier_ok(ndev))
- goto quit_polling;
-
ql_tx_rx_clean(qdev, &tx_cleaned, &rx_cleaned, budget);
- if (tx_cleaned + rx_cleaned != budget ||
- !netif_running(ndev)) {
-quit_polling:
+ if (tx_cleaned + rx_cleaned != budget) {
spin_lock_irqsave(&qdev->hw_lock, hw_flags);
__netif_rx_complete(ndev, napi);
ql_update_small_bufq_prod_index(qdev);
diff --git a/drivers/net/s2io.c b/drivers/net/s2io.c
index 9d80f1c..fa57c49 100644
--- a/drivers/net/s2io.c
+++ b/drivers/net/s2io.c
@@ -2704,9 +2704,6 @@ static int s2io_poll(struct napi_struct *napi, int budget)
struct XENA_dev_config __iomem *bar0 = nic->bar0;
int i;
- if (!is_s2io_card_up(nic))
- return 0;
-
mac_control = &nic->mac_control;
config = &nic->config;
diff --git a/drivers/net/tulip/interrupt.c b/drivers/net/tulip/interrupt.c
index 0461956..6284afd 100644
--- a/drivers/net/tulip/interrupt.c
+++ b/drivers/net/tulip/interrupt.c
@@ -117,9 +117,6 @@ int tulip_poll(struct napi_struct *napi, int budget)
int received = 0;
#endif
- if (!netif_running(dev))
- goto done;
-
#ifdef CONFIG_TULIP_NAPI_HW_MITIGATION
/* that one buffer is needed for mit activation; or might be a
@@ -261,8 +258,6 @@ int tulip_poll(struct napi_struct *napi, int budget)
* finally: amount of IO did not increase at all. */
} while ((ioread32(tp->base_addr + CSR5) & RxIntr));
-done:
-
#ifdef CONFIG_TULIP_NAPI_HW_MITIGATION
/* We use this simplistic scheme for IM. It's proven by
diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index 2a8fc43..bca37bf 100644
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -852,11 +852,6 @@ static int xennet_poll(struct napi_struct *napi, int budget)
spin_lock(&np->rx_lock);
- if (unlikely(!netif_carrier_ok(dev))) {
- spin_unlock(&np->rx_lock);
- return 0;
- }
-
skb_queue_head_init(&rxq);
skb_queue_head_init(&errq);
skb_queue_head_init(&tmpq);
--
1.5.4.rc2.38.gd6da3
--
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