netdev - 回复: 回复: [PATCH] net: stmmac: enable MAC after MTL configuring

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Message-ID: <daf687938ae1413bbc556134b47d0629@siengine.com>
Date: Sun, 20 Oct 2024 01:45:41 +0000
From: Fan Hailong/范海龙 <hailong.fan@...ngine.com>
To: Andrew Lunn <andrew@...n.ch>
CC: Simon Horman <horms@...nel.org>, "2694439648@...com" <2694439648@...com>,
        "alexandre.torgue@...s.st.com" <alexandre.torgue@...s.st.com>,
        "joabreu@...opsys.com" <joabreu@...opsys.com>,
        "davem@...emloft.net"
	<davem@...emloft.net>,
        "edumazet@...gle.com" <edumazet@...gle.com>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "pabeni@...hat.com" <pabeni@...hat.com>,
        "mcoquelin.stm32@...il.com" <mcoquelin.stm32@...il.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-stm32@...md-mailman.stormreply.com"
	<linux-stm32@...md-mailman.stormreply.com>,
        "linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>
Subject: 回复: 回复: [PATCH] net: stmmac: enable MAC after MTL configuring

Hi 

Please find new patch in attachments, thanks.


-----邮件原件-----
发件人: Andrew Lunn <andrew@...n.ch> 
发送时间: 2024年10月19日 1:57
收件人: Fan Hailong/范海龙 <hailong.fan@...ngine.com>
抄送: Simon Horman <horms@...nel.org>; 2694439648@...com; alexandre.torgue@...s.st.com; joabreu@...opsys.com; davem@...emloft.net; edumazet@...gle.com; kuba@...nel.org; pabeni@...hat.com; mcoquelin.stm32@...il.com; netdev@...r.kernel.org; linux-stm32@...md-mailman.stormreply.com; linux-arm-kernel@...ts.infradead.org; linux-kernel@...r.kernel.org
主题: Re: 回复: [PATCH] net: stmmac: enable MAC after MTL configuring

On Fri, Oct 18, 2024 at 01:15:30AM +0000, Fan Hailong/范海龙 wrote:
> Hi
> 
> For example, ETH is directly connected to the switch, which never power down and sends broadcast packets at regular intervals. 
> During the process of opening ETH, data may flow into the MTL FIFO, once MAC RX is enabled.
> and then, MTL will be set, such as FIFO size. 
> Once enable DMA, There is a certain probability that DMA will read incorrect data from MTL FIFO, causing DMA to hang up. 
> By read DMA_Debug_Status, you can be observed that the RPS remains at a certain value forever. 
> The correct process should be to configure MAC/MTL/DMA before enabling DMA/MAC

What Simon is asking for is that this is part of the commit message.

Please also don't top post.

    Andrew

---
pw-bot: cr

Download attachment "0001-net-stmmac-enable-MAC-after-MTL-configuring.patch" of type "application/octet-stream" (4554 bytes)