From: Jose Abreu <Jose.Abreu@synopsys.com>
To: netdev@vger.kernel.org
Cc: Joao Pinto <Joao.Pinto@synopsys.com>,
Jose Abreu <Jose.Abreu@synopsys.com>,
Giuseppe Cavallaro <peppe.cavallaro@st.com>,
Alexandre Torgue <alexandre.torgue@st.com>,
"David S. Miller" <davem@davemloft.net>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
linux-stm32@st-md-mailman.stormreply.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH net 1/2] net: stmmac: RX Descriptors need to be clean before setting buffers
Date: Mon, 22 Jul 2019 10:39:30 +0200 [thread overview]
Message-ID: <00bfde6f589e60ba1a2d0671c8ba0fcd0964d6e7.1563784666.git.joabreu@synopsys.com> (raw)
In-Reply-To: <cover.1563784666.git.joabreu@synopsys.com>
In-Reply-To: <cover.1563784666.git.joabreu@synopsys.com>
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: 2af6106ae949 ("net: stmmac: Introducing support for Page Pool")
Signed-off-by: Jose Abreu <joabreu@synopsys.com>
---
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: Jose Abreu <joabreu@synopsys.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: netdev@vger.kernel.org
Cc: linux-stm32@st-md-mailman.stormreply.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
---
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index c7c9e5f162e6..5f1294ce0216 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -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)
--
2.7.4
next prev parent reply other threads:[~2019-07-22 8:40 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-22 8:39 [PATCH net 0/2] net: stmmac: Two fixes Jose Abreu
2019-07-22 8:39 ` Jose Abreu [this message]
2019-07-22 8:39 ` [PATCH net 2/2] net: stmmac: Use kcalloc() instead of kmalloc_array() Jose Abreu
2019-07-23 1:23 ` [PATCH net 0/2] net: stmmac: Two fixes David Miller
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