linux-kernel - [PATCH net-next v2 03/12] net: stmmac: xgmac: Correctly return that RX descriptor is not last one

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Date:   Mon, 12 Aug 2019 11:44:02 +0200
From:   Jose Abreu <Jose.Abreu@...opsys.com>
To:     netdev@...r.kernel.org
Cc:     Joao Pinto <Joao.Pinto@...opsys.com>,
        Jose Abreu <Jose.Abreu@...opsys.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        "David S. Miller" <davem@...emloft.net>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH net-next v2 03/12] net: stmmac: xgmac: Correctly return that RX descriptor is not last one

Return the correct value when RX descriptor is not the last one.

Signed-off-by: Jose Abreu <joabreu@...opsys.com>

---
Cc: Giuseppe Cavallaro <peppe.cavallaro@...com>
Cc: Alexandre Torgue <alexandre.torgue@...com>
Cc: Jose Abreu <joabreu@...opsys.com>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: Maxime Coquelin <mcoquelin.stm32@...il.com>
Cc: netdev@...r.kernel.org
Cc: linux-stm32@...md-mailman.stormreply.com
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org
---
 drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c
index 2391ede97597..717b50d4aa93 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c
@@ -26,16 +26,15 @@ static int dwxgmac2_get_rx_status(void *data, struct stmmac_extra_stats *x,
 				  struct dma_desc *p)
 {
 	unsigned int rdes3 = le32_to_cpu(p->des3);
-	int ret = good_frame;
 
 	if (unlikely(rdes3 & XGMAC_RDES3_OWN))
 		return dma_own;
 	if (likely(!(rdes3 & XGMAC_RDES3_LD)))
+		return rx_not_ls;
+	if (unlikely((rdes3 & XGMAC_RDES3_ES) && (rdes3 & XGMAC_RDES3_LD)))
 		return discard_frame;
-	if (unlikely(rdes3 & XGMAC_RDES3_ES))
-		ret = discard_frame;
 
-	return ret;
+	return good_frame;
 }
 
 static int dwxgmac2_get_tx_len(struct dma_desc *p)
-- 
2.7.4