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authorDavid S. Miller <davem@davemloft.net>2008-01-15 22:43:24 -0800
committerDavid S. Miller <davem@davemloft.net>2008-01-17 01:49:29 -0800
commitd2c7ddd6261eb885091cf6ddbcfae01f4216fb8e (patch)
treefefe1f6e6162e019be7a3f27788a395b1d121688 /drivers/net/e1000e
parentd8c89eb3a12f0da96d049bd515c7fa3702e511c5 (diff)
downloadblackbird-op-linux-d2c7ddd6261eb885091cf6ddbcfae01f4216fb8e.tar.gz
blackbird-op-linux-d2c7ddd6261eb885091cf6ddbcfae01f4216fb8e.zip
[NET]: Fix TX timeout regression in Intel drivers.
This fixes a regression added by changeset 53e52c729cc169db82a6105fac7a166e10c2ec36 ("[NET]: Make ->poll() breakout consistent in Intel ethernet drivers.") As pointed out by Jesse Brandeburg, for three of the drivers edited above there is breakout logic in the *_clean_tx_irq() code to prevent running TX reclaim forever. If this occurs, we have to elide NAPI poll completion or else those TX events will never be serviced. Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Diffstat (limited to 'drivers/net/e1000e')
-rw-r--r--drivers/net/e1000e/netdev.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c
index 4a6fc7453776..2ab3bfbb8a63 100644
--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -1384,7 +1384,7 @@ static int e1000_clean(struct napi_struct *napi, int budget)
{
struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
struct net_device *poll_dev = adapter->netdev;
- int work_done = 0;
+ int tx_cleaned = 0, work_done = 0;
/* Must NOT use netdev_priv macro here. */
adapter = poll_dev->priv;
@@ -1394,12 +1394,15 @@ static int e1000_clean(struct napi_struct *napi, int budget)
* simultaneously. A failure obtaining the lock means
* tx_ring is currently being cleaned anyway. */
if (spin_trylock(&adapter->tx_queue_lock)) {
- e1000_clean_tx_irq(adapter);
+ tx_cleaned = e1000_clean_tx_irq(adapter);
spin_unlock(&adapter->tx_queue_lock);
}
adapter->clean_rx(adapter, &work_done, budget);
+ if (tx_cleaned)
+ work_done = budget;
+
/* If budget not fully consumed, exit the polling mode */
if (work_done < budget) {
if (adapter->itr_setting & 3)
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