From: Simon Horman <horms@verge.net.au>
To: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Cc: David Miller <davem@davemloft.net>,
Magnus Damm <magnus.damm@gmail.com>,
netdev@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
Kazuya Mizuguchi <kazuya.mizuguchi.ks@renesas.com>
Subject: Re: [net-next 2/3] ravb: Remove undocumented processing
Date: Thu, 5 Sep 2019 10:34:08 +0200 [thread overview]
Message-ID: <20190905083407.bnx2l4lkqfek3qfc@verge.net.au> (raw)
In-Reply-To: <f54e244a-2d9d-7ba8-02fb-af5572b3a191@cogentembedded.com>
On Mon, Sep 02, 2019 at 08:41:14PM +0300, Sergei Shtylyov wrote:
> On 09/02/2019 11:06 AM, Simon Horman wrote:
>
> > From: Kazuya Mizuguchi <kazuya.mizuguchi.ks@renesas.com>
> >
> > This patch removes the use of the undocumented registers
> > CDCR, LCCR, CERCR, CEECR and the undocumented BOC bit of the CCC register.
>
> The driver has many more #define's marked as undocumented. It's not clear
> why you crammed the counters and the endianness bit in one patch. It clearly
> needs to be split -- one patch for the MAC counters and one patch for the
> AVB-DMAC bit.
Thanks for the suggestion, I will split the patch.
> > Current documentation for EtherAVB (ravb) describes the offset of
> > what the driver uses as the BOC bit as reserved and that only a value of
> > 0 should be written. Furthermore, the offsets used for the undocumented
> > registers are also considered reserved nd should not be written to.
> >
> > After some internal investigation with Renesas it remains unclear
> > why this driver accesses these fields but regardless of what the historical
> > reasons are the current code is considered incorrect.
> >
> > Signed-off-by: Kazuya Mizuguchi <kazuya.mizuguchi.ks@renesas.com>
> > Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
> [...]
>
> MBR, Sergei
>
next prev parent reply other threads:[~2019-09-05 8:34 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-02 8:06 [net-next 0/3] ravb: Remove use of undocumented registers Simon Horman
2019-09-02 8:06 ` [net-next 1/3] ravb: correct typo in FBP field of SFO register Simon Horman
2019-09-02 10:47 ` Yoshihiro Shimoda
2019-09-02 17:12 ` Sergei Shtylyov
2019-09-02 18:33 ` David Miller
2019-09-05 8:34 ` Simon Horman
2019-09-02 8:06 ` [net-next 2/3] ravb: Remove undocumented processing Simon Horman
2019-09-02 10:49 ` Yoshihiro Shimoda
2019-09-02 17:41 ` Sergei Shtylyov
2019-09-05 8:34 ` Simon Horman [this message]
2019-09-02 8:06 ` [net-next 3/3] ravb: TROCR register is only present on R-Car Gen3 Simon Horman
2019-09-02 10:51 ` Yoshihiro Shimoda
2019-09-02 17:54 ` Sergei Shtylyov
2019-09-02 8:16 ` [net-next 0/3] ravb: Remove use of undocumented registers Geert Uytterhoeven
2019-09-02 13:16 ` Chris Paterson
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