linux-kernel - Re: [PATCH v2] Prevent interrupt loop with DWMAC MMC RX IPC Counter

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Message-ID: <511E51A9.9020908@st.com>
Date:	Fri, 15 Feb 2013 16:18:01 +0100
From:	Giuseppe CAVALLARO <peppe.cavallaro@...com>
To:	Christian Ruppert <christian.ruppert@...lis.com>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Vineet Gupta <Vineet.Gupta1@...opsys.com>
Subject: Re: [PATCH v2] Prevent interrupt loop with DWMAC MMC RX IPC Counter

On 2/15/2013 3:58 PM, Christian Ruppert wrote:
> 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).
>

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