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net: stmmac: RX Descriptors need to be clean before setting buffers 

RX Descriptors are being cleaned after setting the buffers which may
lead to buffer addresses being wiped out.

Fix this by clearing earlier the RX Descriptors.

Fixes: 2af6106ae9 ("net: stmmac: Introducing support for Page Pool")
Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jose Abreu 2019-07-22 10:39:30 +02:00 committed by David S. Miller
parent f4e5f775db
commit cbcf0999ae
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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@ -1295,6 +1295,8 @@ static int init_dma_rx_desc_rings(struct net_device *dev, gfp_t flags)
"(%s) dma_rx_phy=0x%08x\n", __func__,
(u32)rx_q->dma_rx_phy);
stmmac_clear_rx_descriptors(priv, queue);
for (i = 0; i < DMA_RX_SIZE; i++) {
struct dma_desc *p;
@ -1312,8 +1314,6 @@ static int init_dma_rx_desc_rings(struct net_device *dev, gfp_t flags)
rx_q->cur_rx = 0;
rx_q->dirty_rx = (unsigned int)(i - DMA_RX_SIZE);
stmmac_clear_rx_descriptors(priv, queue);
/* Setup the chained descriptor addresses */
if (priv->mode == STMMAC_CHAIN_MODE) {
if (priv->extend_desc)