From: Netanel Belgazal netanel@amazon.com
[ Upstream commit 7853b49ce8e0ef6364d24512b287463841d71bd3 ]
Under certain conditions MSI-X interrupt might arrive right after it was unmasked in ena_up(). There is a chance it would be processed by the driver before device ENA_FLAG_DEV_UP flag is set. In such a case the interrupt is ignored. ENA device operates in auto-masked mode, therefore ignoring interrupt leaves it masked for good. Moving unmask of interrupt to be the last step in ena_up().
Signed-off-by: Netanel Belgazal netanel@amazon.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin alexander.levin@microsoft.com --- drivers/net/ethernet/amazon/ena/ena_netdev.c | 26 +++++++++++++------------- 1 file changed, 13 insertions(+), 13 deletions(-)
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c index c6bd5e24005d..67df5053dc30 100644 --- a/drivers/net/ethernet/amazon/ena/ena_netdev.c +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c @@ -1565,7 +1565,7 @@ static int ena_rss_configure(struct ena_adapter *adapter)
static int ena_up_complete(struct ena_adapter *adapter) { - int rc, i; + int rc;
rc = ena_rss_configure(adapter); if (rc) @@ -1584,17 +1584,6 @@ static int ena_up_complete(struct ena_adapter *adapter)
ena_napi_enable_all(adapter);
- /* Enable completion queues interrupt */ - for (i = 0; i < adapter->num_queues; i++) - ena_unmask_interrupt(&adapter->tx_ring[i], - &adapter->rx_ring[i]); - - /* schedule napi in case we had pending packets - * from the last time we disable napi - */ - for (i = 0; i < adapter->num_queues; i++) - napi_schedule(&adapter->ena_napi[i].napi); - return 0; }
@@ -1731,7 +1720,7 @@ create_err:
static int ena_up(struct ena_adapter *adapter) { - int rc; + int rc, i;
netdev_dbg(adapter->netdev, "%s\n", __func__);
@@ -1774,6 +1763,17 @@ static int ena_up(struct ena_adapter *adapter)
set_bit(ENA_FLAG_DEV_UP, &adapter->flags);
+ /* Enable completion queues interrupt */ + for (i = 0; i < adapter->num_queues; i++) + ena_unmask_interrupt(&adapter->tx_ring[i], + &adapter->rx_ring[i]); + + /* schedule napi in case we had pending packets + * from the last time we disable napi + */ + for (i = 0; i < adapter->num_queues; i++) + napi_schedule(&adapter->ena_napi[i].napi); + return rc;
err_up: