linux-kernel - Re: [PATCH net-next v2 00/16] net: dsa: turn arrays of ports into a list

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Message-ID: <821609f6-5430-5c46-82a4-a30a6eb85531@ysoft.com>
Date:   Tue, 22 Oct 2019 13:43:18 +0200
From:   Michal Vokáč <michal.vokac@...ft.com>
To:     Vivien Didelot <vivien.didelot@...il.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        linux-kernel@...r.kernel.org,
        Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>, netdev@...r.kernel.org
Subject: Re: [PATCH net-next v2 00/16] net: dsa: turn arrays of ports into a
 list

On 21. 10. 19 22:51, Vivien Didelot wrote:
> The dsa_switch structure represents the physical switch device itself,
> and is allocated by the driver. The dsa_switch_tree and dsa_port structures
> represent the logical switch fabric (eventually composed of multiple switch
> devices) and its ports, and are allocated by the DSA core.
> 
> This branch lists the logical ports directly in the fabric which simplifies
> the iteration over all ports when assigning the default CPU port or configuring
> the D in DSA in drivers like mv88e6xxx.
> 
> This also removes the unique dst->cpu_dp pointer and is a first step towards
> supporting multiple CPU ports and dropping the DSA_MAX_PORTS limitation.
> 
> Because the dsa_port structures are not tight to the dsa_switch structure
> anymore, we do not need to provide an helper for the drivers to allocate a
> switch structure. Like in many other subsystems, drivers can now embed their
> dsa_switch structure as they wish into their private structure. This will
> be particularly interesting for the Broadcom drivers which were currently
> limited by the dynamically allocated array of DSA ports.
> 
> The series implements the list of dsa_port structures, makes use of it,
> then drops dst->cpu_dp and the dsa_switch_alloc helper.

I just tried the whole series on our imx6dl-yapp4-hydra with QCA8334
switch and did not notice any problems as well. Thank you.

Tested-by: Michal Vokáč <michal.vokac@...ft.com>