diff options
| author | Stuart Hodgson <smhodgson@solarflare.com> | 2012-03-30 13:04:51 +0100 |
|---|---|---|
| committer | Ben Hutchings <bhutchings@solarflare.com> | 2012-05-10 02:22:08 +0100 |
| commit | 3dca9d2dc285faf1910d405b65df845cab061356 (patch) | |
| tree | 2fbc8f7dbe766e99664db565617d73a8e6e0b4d5 /drivers | |
| parent | 2e7d21c54adbab6d10481eddc685328f89bb6389 (diff) | |
| download | linux-3dca9d2dc285faf1910d405b65df845cab061356.tar.gz | |
sfc: Do not attempt to flush queues if DMA is disabled
efx_nic_fatal_interrupt() disables DMA before scheduling a reset. After this, we need not and *cannot* flush queues. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/sfc/efx.c | 33 |
1 files changed, 19 insertions, 14 deletions
diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c index 3cbfbffe3f00..5cc58a3b75ac 100644 --- a/drivers/net/ethernet/sfc/efx.c +++ b/drivers/net/ethernet/sfc/efx.c @@ -656,25 +656,30 @@ static void efx_stop_datapath(struct efx_nic *efx) struct efx_channel *channel; struct efx_tx_queue *tx_queue; struct efx_rx_queue *rx_queue; + struct pci_dev *dev = efx->pci_dev; int rc; EFX_ASSERT_RESET_SERIALISED(efx); BUG_ON(efx->port_enabled); - rc = efx_nic_flush_queues(efx); - if (rc && EFX_WORKAROUND_7803(efx)) { - /* Schedule a reset to recover from the flush failure. The - * descriptor caches reference memory we're about to free, - * but falcon_reconfigure_mac_wrapper() won't reconnect - * the MACs because of the pending reset. */ - netif_err(efx, drv, efx->net_dev, - "Resetting to recover from flush failure\n"); - efx_schedule_reset(efx, RESET_TYPE_ALL); - } else if (rc) { - netif_err(efx, drv, efx->net_dev, "failed to flush queues\n"); - } else { - netif_dbg(efx, drv, efx->net_dev, - "successfully flushed all queues\n"); + /* Only perform flush if dma is enabled */ + if (dev->is_busmaster) { + rc = efx_nic_flush_queues(efx); + + if (rc && EFX_WORKAROUND_7803(efx)) { + /* Schedule a reset to recover from the flush failure. The + * descriptor caches reference memory we're about to free, + * but falcon_reconfigure_mac_wrapper() won't reconnect + * the MACs because of the pending reset. */ + netif_err(efx, drv, efx->net_dev, + "Resetting to recover from flush failure\n"); + efx_schedule_reset(efx, RESET_TYPE_ALL); + } else if (rc) { + netif_err(efx, drv, efx->net_dev, "failed to flush queues\n"); + } else { + netif_dbg(efx, drv, efx->net_dev, + "successfully flushed all queues\n"); + } } efx_for_each_channel(channel, efx) { |