All of lore.kernel.org
 help / color / mirror / Atom feed
From: Andrew Lunn <andrew@lunn.ch>
To: Tobias Waldekranz <tobias@waldekranz.com>
Cc: davem@davemloft.net, kuba@kernel.org, madalin.bucur@nxp.com,
	robh+dt@kernel.org, mpe@ellerman.id.au, benh@kernel.crashing.org,
	paulus@samba.org, netdev@vger.kernel.org,
	devicetree@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH net 1/4] net/fsl: xgmac_mdio: Add workaround for erratum A-009885
Date: Sun, 16 Jan 2022 23:02:19 +0100	[thread overview]
Message-ID: <YeSV67WeMTSDigUK@lunn.ch> (raw)
In-Reply-To: <20220116211529.25604-2-tobias@waldekranz.com>

On Sun, Jan 16, 2022 at 10:15:26PM +0100, Tobias Waldekranz wrote:
> Once an MDIO read transaction is initiated, we must read back the data
> register within 16 MDC cycles after the transaction completes. Outside
> of this window, reads may return corrupt data.
> 
> Therefore, disable local interrupts in the critical section, to
> maximize the probability that we can satisfy this requirement.

Since this is for net, a Fixes: tag would be nice. Maybe that would be
for the commit which added this driver, or maybe when the DTSI files
for the SOCs which have this errata we added?

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

    Andrew

WARNING: multiple messages have this Message-ID (diff)
From: Andrew Lunn <andrew@lunn.ch>
To: Tobias Waldekranz <tobias@waldekranz.com>
Cc: devicetree@vger.kernel.org, madalin.bucur@nxp.com,
	robh+dt@kernel.org, paulus@samba.org, kuba@kernel.org,
	netdev@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
	davem@davemloft.net
Subject: Re: [PATCH net 1/4] net/fsl: xgmac_mdio: Add workaround for erratum A-009885
Date: Sun, 16 Jan 2022 23:02:19 +0100	[thread overview]
Message-ID: <YeSV67WeMTSDigUK@lunn.ch> (raw)
In-Reply-To: <20220116211529.25604-2-tobias@waldekranz.com>

On Sun, Jan 16, 2022 at 10:15:26PM +0100, Tobias Waldekranz wrote:
> Once an MDIO read transaction is initiated, we must read back the data
> register within 16 MDC cycles after the transaction completes. Outside
> of this window, reads may return corrupt data.
> 
> Therefore, disable local interrupts in the critical section, to
> maximize the probability that we can satisfy this requirement.

Since this is for net, a Fixes: tag would be nice. Maybe that would be
for the commit which added this driver, or maybe when the DTSI files
for the SOCs which have this errata we added?

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

    Andrew

  reply	other threads:[~2022-01-16 22:02 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-16 21:15 [PATCH net 0/4] net/fsl: xgmac_mdio: Add workaround for erratum A-009885 Tobias Waldekranz
2022-01-16 21:15 ` Tobias Waldekranz
2022-01-16 21:15 ` [PATCH net 1/4] " Tobias Waldekranz
2022-01-16 21:15   ` Tobias Waldekranz
2022-01-16 22:02   ` Andrew Lunn [this message]
2022-01-16 22:02     ` Andrew Lunn
2022-01-17  7:24     ` Tobias Waldekranz
2022-01-17  7:24       ` Tobias Waldekranz
2022-01-17 14:00       ` Andrew Lunn
2022-01-17 14:00         ` Andrew Lunn
2022-01-18 20:34         ` Jakub Kicinski
2022-01-18 20:34           ` Jakub Kicinski
2022-01-18  8:40   ` Tobias Waldekranz
2022-01-18  8:40     ` Tobias Waldekranz
2022-01-16 21:15 ` [PATCH net 2/4] dt-bindings: net: Document fsl,erratum-a009885 Tobias Waldekranz
2022-01-16 21:15   ` Tobias Waldekranz
2022-01-16 21:56   ` Andrew Lunn
2022-01-16 21:56     ` Andrew Lunn
2022-01-16 21:15 ` [PATCH net 3/4] powerpc/fsl/dts: Enable WA for erratum A-009885 on fman3l MDIO buses Tobias Waldekranz
2022-01-16 21:15   ` Tobias Waldekranz
2022-01-18  8:41   ` Tobias Waldekranz
2022-01-18  8:41     ` Tobias Waldekranz
2022-01-16 21:15 ` [PATCH net 4/4] net/fsl: xgmac_mdio: Fix incorrect iounmap when removing module Tobias Waldekranz
2022-01-16 21:15   ` Tobias Waldekranz
2022-01-16 21:54   ` Andrew Lunn
2022-01-16 21:54     ` Andrew Lunn
2022-01-17  7:26     ` Tobias Waldekranz
2022-01-17  7:26       ` Tobias Waldekranz

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=YeSV67WeMTSDigUK@lunn.ch \
    --to=andrew@lunn.ch \
    --cc=benh@kernel.crashing.org \
    --cc=davem@davemloft.net \
    --cc=devicetree@vger.kernel.org \
    --cc=kuba@kernel.org \
    --cc=linuxppc-dev@lists.ozlabs.org \
    --cc=madalin.bucur@nxp.com \
    --cc=mpe@ellerman.id.au \
    --cc=netdev@vger.kernel.org \
    --cc=paulus@samba.org \
    --cc=robh+dt@kernel.org \
    --cc=tobias@waldekranz.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.