4.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Netanel Belgazal netanel@amazon.com
[ Upstream commit cfa324a514233b28a6934de619183eee941f02d7 ]
When ena_destroy_device() is called from ena_suspend(), the device is still reachable from the driver. Therefore, the driver can send a command to the device to free all resources. However, in all other cases of calling ena_destroy_device(), the device is potentially in an error state and unreachable from the driver. In these cases the driver must not send commands to the device.
The current implementation does not request resource freeing from the device even when possible. We add the graceful parameter to ena_destroy_device() to enable resource freeing when possible, and use it in ena_suspend().
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/amazon/ena/ena_netdev.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-)
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c @@ -76,7 +76,7 @@ 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 void ena_destroy_device(struct ena_adapter *adapter, bool graceful); static int ena_restore_device(struct ena_adapter *adapter);
static void ena_tx_timeout(struct net_device *dev) @@ -1900,7 +1900,7 @@ static int ena_close(struct net_device * "Destroy failure, restarting device\n"); ena_dump_stats_to_dmesg(adapter); /* rtnl lock already obtained in dev_ioctl() layer */ - ena_destroy_device(adapter); + ena_destroy_device(adapter, false); ena_restore_device(adapter); }
@@ -2549,7 +2549,7 @@ err_disable_msix: return rc; }
-static void ena_destroy_device(struct ena_adapter *adapter) +static void ena_destroy_device(struct ena_adapter *adapter, bool graceful) { struct net_device *netdev = adapter->netdev; struct ena_com_dev *ena_dev = adapter->ena_dev; @@ -2562,7 +2562,8 @@ static void ena_destroy_device(struct en dev_up = test_bit(ENA_FLAG_DEV_UP, &adapter->flags); adapter->dev_up_before_reset = dev_up;
- ena_com_set_admin_running_state(ena_dev, false); + if (!graceful) + ena_com_set_admin_running_state(ena_dev, false);
if (test_bit(ENA_FLAG_DEV_UP, &adapter->flags)) ena_down(adapter); @@ -2664,7 +2665,7 @@ static void ena_fw_reset_device(struct w return; } rtnl_lock(); - ena_destroy_device(adapter); + ena_destroy_device(adapter, false); ena_restore_device(adapter); rtnl_unlock(); } @@ -3466,7 +3467,7 @@ static int ena_suspend(struct pci_dev *p "ignoring device reset request as the device is being suspended\n"); clear_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags); } - ena_destroy_device(adapter); + ena_destroy_device(adapter, true); rtnl_unlock(); return 0; }