diff --git a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c index 6fd730ac23a107b76c74ce21cb704e19eba91b10..51a994d858708d455a2f3062c822588e51427957 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c +++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c @@ -1274,6 +1274,13 @@ static int i40e_set_ringparam(struct net_device *netdev, } for (i = 0; i < vsi->num_queue_pairs; i++) { + /* this is to allow wr32 to have something to write to + * during early allocation of Rx buffers + */ + u32 __iomem faketail = 0; + struct i40e_ring *ring; + u16 unused; + /* clone ring and setup updated count */ rx_rings[i] = *vsi->rx_rings[i]; rx_rings[i].count = new_rx_count; @@ -1282,12 +1289,22 @@ static int i40e_set_ringparam(struct net_device *netdev, */ rx_rings[i].desc = NULL; rx_rings[i].rx_bi = NULL; + rx_rings[i].tail = (u8 __iomem *)&faketail; err = i40e_setup_rx_descriptors(&rx_rings[i]); + if (err) + goto rx_unwind; + + /* now allocate the Rx buffers to make sure the OS + * has enough memory, any failure here means abort + */ + ring = &rx_rings[i]; + unused = I40E_DESC_UNUSED(ring); + err = i40e_alloc_rx_buffers(ring, unused); +rx_unwind: if (err) { - while (i) { - i--; + do { i40e_free_rx_resources(&rx_rings[i]); - } + } while (i--); kfree(rx_rings); rx_rings = NULL; @@ -1313,6 +1330,17 @@ static int i40e_set_ringparam(struct net_device *netdev, if (rx_rings) { for (i = 0; i < vsi->num_queue_pairs; i++) { i40e_free_rx_resources(vsi->rx_rings[i]); + /* get the real tail offset */ + rx_rings[i].tail = vsi->rx_rings[i]->tail; + /* this is to fake out the allocation routine + * into thinking it has to realloc everything + * but the recycling logic will let us re-use + * the buffers allocated above + */ + rx_rings[i].next_to_use = 0; + rx_rings[i].next_to_clean = 0; + rx_rings[i].next_to_alloc = 0; + /* do a struct copy */ *vsi->rx_rings[i] = rx_rings[i]; } kfree(rx_rings);