linux-kernel - Re: [PATCH] arm64: dts: imx8mm-verdin: Do not power down eth-phy

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Message-ID: <20230126073235.GU20713@T480>
Date:   Thu, 26 Jan 2023 15:32:36 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Philippe Schenker <dev@...henker.ch>
Cc:     devicetree@...r.kernel.org,
        Philippe Schenker <philippe.schenker@...adex.com>,
        Andrejs Cainikovs <andrejs.cainikovs@...adex.com>,
        Fabio Estevam <festevam@...il.com>,
        Francesco Dolcini <francesco.dolcini@...adex.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        NXP Linux Team <linux-imx@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: imx8mm-verdin: Do not power down eth-phy

On Mon, Jan 16, 2023 at 03:01:52PM +0100, Philippe Schenker wrote:
> From: Philippe Schenker <philippe.schenker@...adex.com>
> 
> Currently if suspending using either freeze or memory state, the fec
> driver tries to power down the phy which leads to crash of the kernel
> and non-responsible kernel with the following call trace:
> 
> [   24.839889 ] Call trace:
> [   24.839892 ]  phy_error+0x18/0x60
> [   24.839898 ]  kszphy_handle_interrupt+0x6c/0x80
> [   24.839903 ]  phy_interrupt+0x20/0x2c
> [   24.839909 ]  irq_thread_fn+0x30/0xa0
> [   24.839919 ]  irq_thread+0x178/0x2c0
> [   24.839925 ]  kthread+0x154/0x160
> [   24.839932 ]  ret_from_fork+0x10/0x20
> 
> Since there is currently no functionality in the phy subsystem to power
> down phys let's just disable the feature of powering-down the ethernet
> phy.
> 
> Fixes: 6a57f224f734 ("arm64: dts: freescale: add initial support for verdin imx8m mini")
> Signed-off-by: Philippe Schenker <philippe.schenker@...adex.com>

Applied, thanks!