netdev - Re: [PATCH v3] net: qcom/emac: extend DMA mask to 46bits

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Message-ID: <e426da96-10b3-f4cc-c46f-3b01e7dd8e68@codeaurora.org>
Date:   Mon, 20 Nov 2017 09:07:33 -0600
From:   Timur Tabi <timur@...eaurora.org>
To:     Wang Dongsheng <wdsch86@...il.com>
Cc:     netdev@...r.kernel.org
Subject: Re: [PATCH v3] net: qcom/emac: extend DMA mask to 46bits

This is much better.  Can you give me a few days to test it on some 
internal platforms?

Also, this is a candidate for 4.16, so you need to wait until net-next 
is open anyway (http://vger.kernel.org/~davem/net-next.html).

On 11/20/17 7:48 AM, Wang Dongsheng wrote:
> Since PTP doesn't support yet, so extend the DMA address to 46bits.

This needs to be longer, since it's not clear that TPD3[31] is bot a 
timestamp bit and an address bit.  How about this:

Bit TPD3[31] is used as a timestamp bit if PTP is enabled,
but it's used as an address bit if PTP is disabled.  Since PTP isn't 
supported by the driver, we can extend the DMA address to 46 bits.

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