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From: Tobias Waldekranz <tobias@waldekranz.com>
To: davem@davemloft.net, kuba@kernel.org
Cc: 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: Tue, 18 Jan 2022 09:40:48 +0100	[thread overview]
Message-ID: <877daxcu7j.fsf@waldekranz.com> (raw)
In-Reply-To: <20220116211529.25604-2-tobias@waldekranz.com>

On Sun, Jan 16, 2022 at 22:15, Tobias Waldekranz <tobias@waldekranz.com> 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.
>
> Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>

Fixes: d55ad2967d89 ("powerpc/mpc85xx: Create dts components for the FSL QorIQ DPAA FMan")

WARNING: multiple messages have this Message-ID (diff)
From: Tobias Waldekranz <tobias@waldekranz.com>
To: davem@davemloft.net, kuba@kernel.org
Cc: devicetree@vger.kernel.org, madalin.bucur@nxp.com,
	robh+dt@kernel.org, paulus@samba.org,
	linuxppc-dev@lists.ozlabs.org, netdev@vger.kernel.org
Subject: Re: [PATCH net 1/4] net/fsl: xgmac_mdio: Add workaround for erratum A-009885
Date: Tue, 18 Jan 2022 09:40:48 +0100	[thread overview]
Message-ID: <877daxcu7j.fsf@waldekranz.com> (raw)
In-Reply-To: <20220116211529.25604-2-tobias@waldekranz.com>

On Sun, Jan 16, 2022 at 22:15, Tobias Waldekranz <tobias@waldekranz.com> 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.
>
> Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>

Fixes: d55ad2967d89 ("powerpc/mpc85xx: Create dts components for the FSL QorIQ DPAA FMan")

  parent reply	other threads:[~2022-01-18  8:40 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
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 [this message]
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

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