netdev - Re: [PATCH net v2 1/3] r8152: fix flow control issue of RTL8156A

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Message-ID: <152dcf8d-16c5-4cbb-881f-9c7e85409ca7@lunn.ch>
Date:   Thu, 27 Apr 2023 14:18:43 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Hayes Wang <hayeswang@...ltek.com>
Cc:     kuba@...nel.org, davem@...emloft.net, netdev@...r.kernel.org,
        nic_swsd@...ltek.com, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org
Subject: Re: [PATCH net v2 1/3] r8152: fix flow control issue of RTL8156A

On Thu, Apr 27, 2023 at 08:10:55PM +0800, Hayes Wang wrote:
> The feature of flow control becomes abnormal, if the device sends a
> pause frame and the tx/rx is disabled before sending a release frame. It
> causes the lost of packets.
> 
> Set PLA_RX_FIFO_FULL and PLA_RX_FIFO_EMPTY to zeros before disabling the
> tx/rx. And, toggle FC_PATCH_TASK before enabling tx/rx to reset the flow
> control patch and timer. Then, the hardware could clear the state and
> the flow control becomes normal after enabling tx/rx.
> 
> Besides, remove inline for fc_pause_on_auto() and fc_pause_off_auto().
> 
> Fixes: 195aae321c82 ("r8152: support new chips")
> Signed-off-by: Hayes Wang <hayeswang@...ltek.com>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew