if (nr_bds == -1 && !(status & XAXIDMA_BD_STS_COMPLETE_MASK))
break;
+ /* Ensure we see complete descriptor update */
+ dma_rmb();
phys = desc_get_phys_addr(lp, cur_p);
dma_unmap_single(ndev->dev.parent, phys,
(cur_p->cntrl & XAXIDMA_BD_CTRL_LENGTH_MASK),
cur_p->app1 = 0;
cur_p->app2 = 0;
cur_p->app4 = 0;
- cur_p->status = 0;
cur_p->skb = NULL;
+ /* ensure our transmit path and device don't prematurely see status cleared */
+ wmb();
+ cur_p->status = 0;
if (sizep)
*sizep += status & XAXIDMA_BD_STS_ACTUAL_LEN_MASK;
int num_frag)
{
struct axidma_bd *cur_p;
+
+ /* Ensure we see all descriptor updates from device or TX IRQ path */
+ rmb();
cur_p = &lp->tx_bd_v[(lp->tx_bd_tail + num_frag) % lp->tx_bd_num];
if (cur_p->status & XAXIDMA_BD_STS_ALL_MASK)
return NETDEV_TX_BUSY;
tail_p = lp->rx_bd_p + sizeof(*lp->rx_bd_v) * lp->rx_bd_ci;
+ /* Ensure we see complete descriptor update */
+ dma_rmb();
phys = desc_get_phys_addr(lp, cur_p);
dma_unmap_single(ndev->dev.parent, phys, lp->max_frm_size,
DMA_FROM_DEVICE);