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| author | Andy Gospodarek <andy@greyhouse.net> | 2009-06-18 15:57:37 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-06-19 12:12:51 +0400 |
| commit | 679e8a0f0ae3333e94b1d374d07775fce9066025 (patch) | |
| tree | d24d7b1f37f8f33599841b51b9aef0c13e57f0e4 /drivers/net/e1000e | |
| parent | 68924920cb457ac44b14ca38343954bdcee046fc (diff) | |
| download | linux-679e8a0f0ae3333e94b1d374d07775fce9066025.tar.xz | |
e1000e: stop unnecessary polling when using msi-x
The last hunk of this commit:
commit 12d04a3c12b420f23398b4d650127642469a60a6
Author: Alexander Duyck <alexander.h.duyck@intel.com>
Date: Wed Mar 25 22:05:03 2009 +0000
e1000e: commonize tx cleanup routine to match e1000 & igb
changed the logic for determining if we should call napi_complete or
not at then end of a napi poll.
If the NIC is using MSI-X with no work to do in ->poll, net_rx_action
can just spin indefinitely on older kernels and for 2 jiffies on newer
kernels since napi_complete is never called and budget isn't
decremented.
Discovered and verified while testing driver backport to an older
kernel.
Signed-off-by: Andy Gospodarek <andy@greyhouse.net>
Acked-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/e1000e')
| -rw-r--r-- | drivers/net/e1000e/netdev.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c index 677f60490f67..679885a122b4 100644 --- a/drivers/net/e1000e/netdev.c +++ b/drivers/net/e1000e/netdev.c @@ -1997,7 +1997,7 @@ static int e1000_clean(struct napi_struct *napi, int budget) struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi); struct e1000_hw *hw = &adapter->hw; struct net_device *poll_dev = adapter->netdev; - int tx_cleaned = 0, work_done = 0; + int tx_cleaned = 1, work_done = 0; adapter = netdev_priv(poll_dev); |