netdev - [PATCH] stmmac: prevent interrupt loop with MMC RX IPC Counter

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Message-Id: <1365580564-9149-1-git-send-email-christian.ruppert@abilis.com>
Date:	Wed, 10 Apr 2013 09:56:04 +0200
From:	Christian Ruppert <christian.ruppert@...lis.com>
To:	netdev@...r.kernel.org
Cc:	Giuseppe Cavallaro <peppe.cavallaro@...com>,
	Christian Ruppert <christian.ruppert@...lis.com>
Subject: [PATCH] stmmac: prevent interrupt loop with MMC RX IPC Counter

If the DesignWare MAC is synthesised with MMC RX IPC Counter, an unmanaged
and unacknowledged interrupt is generated after some time of operation.

This patch masks the undesired interrupts.

Signed-off-by: Christian Ruppert <christian.ruppert@...lis.com>
Acked-by: Giuseppe Cavallaro <peppe.cavallaro@...com>
---
 drivers/net/ethernet/stmicro/stmmac/mmc_core.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/mmc_core.c b/drivers/net/ethernet/stmicro/stmmac/mmc_core.c
index 0c74a70..50617c5 100644
--- a/drivers/net/ethernet/stmicro/stmmac/mmc_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/mmc_core.c
@@ -149,6 +149,7 @@ void dwmac_mmc_intr_all_mask(void __iomem *ioaddr)
 {
 	writel(MMC_DEFAULT_MASK, ioaddr + MMC_RX_INTR_MASK);
 	writel(MMC_DEFAULT_MASK, ioaddr + MMC_TX_INTR_MASK);
+	writel(MMC_DEFAULT_MASK, ioaddr + MMC_RX_IPC_INTR_MASK);
 }
 
 /* This reads the MAC core counters (if actaully supported).
-- 
1.7.1

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