From ee4552aaf3fef5345199b8a82e40be7245b289fb Mon Sep 17 00:00:00 2001 From: Netanel Belgazal Date: Wed, 3 Jan 2018 06:17:30 +0000 Subject: [PATCH] net: ena: fix error handling in ena_down() sequence ENA admin command queue errors are not handled as part of ena_down(). As a result, in case of error admin queue transitions to non-running state and aborts all subsequent commands including those coming from ena_up(). Reset scheduled by the driver from the timer service context would not proceed due to sharing rtnl with ena_up()/ena_down() Signed-off-by: Netanel Belgazal Signed-off-by: David S. Miller --- drivers/net/ethernet/amazon/ena/ena_netdev.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c index 6fb28fd43eb3..fbe21a817bd8 100644 --- a/drivers/net/ethernet/amazon/ena/ena_netdev.c +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c @@ -75,6 +75,9 @@ static struct workqueue_struct *ena_wq; MODULE_DEVICE_TABLE(pci, ena_pci_tbl); static int ena_rss_init_default(struct ena_adapter *adapter); +static void check_for_admin_com_state(struct ena_adapter *adapter); +static void ena_destroy_device(struct ena_adapter *adapter); +static int ena_restore_device(struct ena_adapter *adapter); static void ena_tx_timeout(struct net_device *dev) { @@ -1884,6 +1887,17 @@ static int ena_close(struct net_device *netdev) if (test_bit(ENA_FLAG_DEV_UP, &adapter->flags)) ena_down(adapter); + /* Check for device status and issue reset if needed*/ + check_for_admin_com_state(adapter); + if (unlikely(test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))) { + netif_err(adapter, ifdown, adapter->netdev, + "Destroy failure, restarting device\n"); + ena_dump_stats_to_dmesg(adapter); + /* rtnl lock already obtained in dev_ioctl() layer */ + ena_destroy_device(adapter); + ena_restore_device(adapter); + } + return 0; } @@ -2544,11 +2558,12 @@ static void ena_destroy_device(struct ena_adapter *adapter) ena_com_set_admin_running_state(ena_dev, false); - ena_close(netdev); + if (test_bit(ENA_FLAG_DEV_UP, &adapter->flags)) + ena_down(adapter); /* Before releasing the ENA resources, a device reset is required. * (to prevent the device from accessing them). - * In case the reset flag is set and the device is up, ena_close + * In case the reset flag is set and the device is up, ena_down() * already perform the reset, so it can be skipped. */ if (!(test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags) && dev_up)) -- 2.30.2