netdev - [PATCH] net: stmmac: Fix null-function call in ISR on stmmac1000

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Message-ID: <4B218985-EF8E-47C0-A682-A3E41BE90003@bluematt.me>
Date:	Thu, 30 Jun 2016 19:46:16 +0000
From:	Matt Corallo <linux@...ematt.me>
To:	linux-amlogic@...ts.infradead.org
CC:	martin.blumenstingl@...glemail.com, peppe.cavallaro@...com,
	alexandre.torgue@...com, netdev@...r.kernel.org
Subject: [PATCH] net: stmmac: Fix null-function call in ISR on stmmac1000

(resent due to overhelpful mail client corrupting patch)

At least on Meson GXBB, the CORE_IRQ_MTL_RX_OVERFLOW interrupt is thrown
with the stmmac1000 driver, which does not support set_rx_tail_ptr. With
this patch and the clock fixes, 1G ethernet works on ODROID-C2.

Signed-off-by: Matt Corallo <git@...ematt.me>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index a473c18..e407126 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -2804,7 +2804,7 @@ static irqreturn_t stmmac_interrupt(int irq, void *dev_id)
 				priv->tx_path_in_lpi_mode = true;
 			if (status & CORE_IRQ_TX_PATH_EXIT_LPI_MODE)
 				priv->tx_path_in_lpi_mode = false;
-			if (status & CORE_IRQ_MTL_RX_OVERFLOW)
+			if (status & CORE_IRQ_MTL_RX_OVERFLOW && priv->hw->dma->set_rx_tail_ptr)
 				priv->hw->dma->set_rx_tail_ptr(priv->ioaddr,
 							priv->rx_tail_addr,
 							STMMAC_CHAN0);
-- 
2.1.4