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authorShannon Nelson <shannon.nelson@intel.com>2009-11-24 18:51:06 +0000
committerDavid S. Miller <davem@davemloft.net>2009-11-29 00:33:58 -0800
commitcfb3f91af49dff9b50de6929dc4de06100c4cfa8 (patch)
treefe3147cc153957299c0151b8c957014190b6685a /drivers/net/ixgbe
parent429d33ace5ce6122817f8abe9d170eaa55dc3af9 (diff)
ixgbe: handle parameters for tx and rx EITR, no div0
The driver was doing a divide by zero when adjusting tx-usecs. This patch removes the divide by zero code and changes the logic slightly to ignore tx-usecs in the case of shared TxRx vectors. Cc: Jesse Brandeburg <jesse.brandeburg@intel.com> Signed-off-by: Shannon Nelson <shannon.nelson@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ixgbe')
-rw-r--r--drivers/net/ixgbe/ixgbe_ethtool.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/net/ixgbe/ixgbe_ethtool.c b/drivers/net/ixgbe/ixgbe_ethtool.c
index 84ab4db7074..a5ca289efc9 100644
--- a/drivers/net/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ixgbe/ixgbe_ethtool.c
@@ -1972,6 +1972,10 @@ static int ixgbe_get_coalesce(struct net_device *netdev,
break;
}
+ /* if in mixed tx/rx queues per vector mode, report only rx settings */
+ if (adapter->q_vector[0]->txr_count && adapter->q_vector[0]->rxr_count)
+ return 0;
+
/* only valid if in constant ITR mode */
switch (adapter->tx_itr_setting) {
case 0:
@@ -1997,12 +2001,9 @@ static int ixgbe_set_coalesce(struct net_device *netdev,
struct ixgbe_q_vector *q_vector;
int i;
- /*
- * don't accept tx specific changes if we've got mixed RxTx vectors
- * test and jump out here if needed before changing the rx numbers
- */
- if ((1000000/ec->tx_coalesce_usecs) != adapter->tx_eitr_param &&
- adapter->q_vector[0]->txr_count && adapter->q_vector[0]->rxr_count)
+ /* don't accept tx specific changes if we've got mixed RxTx vectors */
+ if (adapter->q_vector[0]->txr_count && adapter->q_vector[0]->rxr_count
+ && ec->tx_coalesce_usecs)
return -EINVAL;
if (ec->tx_max_coalesced_frames_irq)