linux-kernel - Re: [PATCH v2] mdio: aspeed: Fix "Link is Down" issue

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Date:   Thu, 25 Nov 2021 16:00:10 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Dylan Hung <dylan_hung@...eedtech.com>
Cc:     linux-kernel@...r.kernel.org, linux-aspeed@...ts.ozlabs.org,
        linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
        andrew@...id.au, joel@....id.au, kuba@...nel.org,
        davem@...emloft.net, linux@...linux.org.uk, hkallweit1@...il.com,
        andrew@...n.ch, BMC-SW@...eedtech.com, stable@...r.kernel.org
Subject: Re: [PATCH v2] mdio: aspeed: Fix "Link is Down" issue

Hello:

This patch was applied to netdev/net.git (master)
by Jakub Kicinski <kuba@...nel.org>:

On Thu, 25 Nov 2021 10:44:32 +0800 you wrote:
> The issue happened randomly in runtime.  The message "Link is Down" is
> popped but soon it recovered to "Link is Up".
> 
> The "Link is Down" results from the incorrect read data for reading the
> PHY register via MDIO bus.  The correct sequence for reading the data
> shall be:
> 1. fire the command
> 2. wait for command done (this step was missing)
> 3. wait for data idle
> 4. read data from data register
> 
> [...]

Here is the summary with links:
  - [v2] mdio: aspeed: Fix "Link is Down" issue
    https://git.kernel.org/netdev/net/c/9dbe33cf371b

You are awesome, thank you!
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