Commit cfb3f91a authored by Shannon Nelson's avatar Shannon Nelson Committed by David S. Miller
Browse files

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 <>
Signed-off-by: default avatarShannon Nelson <>
Signed-off-by: default avatarJeff Kirsher <>
Signed-off-by: default avatarDavid S. Miller <>
parent 429d33ac
......@@ -1972,6 +1972,10 @@ static int ixgbe_get_coalesce(struct net_device *netdev,
/* 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)
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