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Subject[PATCH v2 net-next 02/13] net: stmmac: xgmac: Add RBU handling in DMA interrupt
Date
Add the handling of Receive Buffer Unavailable interrupt in the DMA
handler of XGMAC cores.

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/dwxgmac2_dma.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
index 64956465c030..e77eb0ddf9b5 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
@@ -322,6 +322,10 @@ static int dwxgmac2_dma_interrupt(void __iomem *ioaddr,

/* ABNORMAL interrupts */
if (unlikely(intr_status & XGMAC_AIS)) {
+ if (unlikely(intr_status & XGMAC_RBU)) {
+ x->rx_buf_unav_irq++;
+ ret |= handle_rx;
+ }
if (unlikely(intr_status & XGMAC_TPS)) {
x->tx_process_stopped_irq++;
ret |= tx_hard_error;
--
2.7.4
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