linux-kernel - Re: [PATCH AUTOSEL 6.1 5/8] phy: tegra: xusb: Set fwnode for xusb port devices

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Message-ID: <CAGETcx_tdhb80X0-sWSBTskY8dMsRr0oV08-=Z_j_yPocWf7cg@mail.gmail.com>
Date: Thu, 5 Dec 2024 16:04:44 -0800
From: Saravana Kannan <saravanak@...gle.com>
To: Sasha Levin <sashal@...nel.org>
Cc: linux-kernel@...r.kernel.org, stable@...r.kernel.org, 
	Jon Hunter <jonathanh@...dia.com>, 
	Nícolas F . R . A . Prado <nfraprado@...labora.com>, 
	Thierry Reding <treding@...dia.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, jckuo@...dia.com, 
	vkoul@...nel.org, kishon@...nel.org, thierry.reding@...il.com, 
	linux-phy@...ts.infradead.org, linux-tegra@...r.kernel.org
Subject: Re: [PATCH AUTOSEL 6.1 5/8] phy: tegra: xusb: Set fwnode for xusb
 port devices

On Wed, Dec 4, 2024 at 3:30 PM Sasha Levin <sashal@...nel.org> wrote:
>
> From: Saravana Kannan <saravanak@...gle.com>
>
> [ Upstream commit 74ffe43bad3af3e2a786ca017c205555ba87ebad ]
>
> fwnode needs to be set for a device for fw_devlink to be able to
> track/enforce its dependencies correctly. Without this, you'll see error
> messages like this when the supplier has probed and tries to make sure
> all its fwnode consumers are linked to it using device links:
>
> tegra-xusb-padctl 3520000.padctl: Failed to create device link (0x180) with 1-0008
>
> Reported-by: Jon Hunter <jonathanh@...dia.com>
> Closes: https://lore.kernel.org/all/20240910130019.35081-1-jonathanh@nvidia.com/
> Tested-by: Jon Hunter <jonathanh@...dia.com>
> Suggested-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>
> Signed-off-by: Saravana Kannan <saravanak@...gle.com>
> Acked-by: Thierry Reding <treding@...dia.com>
> Link: https://lore.kernel.org/r/20241024061347.1771063-3-saravanak@google.com
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Signed-off-by: Sasha Levin <sashal@...nel.org>

As mentioned in the original cover letter:

PSA: Do not pull any of these patches into stable kernels. fw_devlink
had a lot of changes that landed in the last year. It's hard to ensure
cherry-picks have picked up all the dependencies correctly. If any of
these really need to get cherry-picked into stable kernels, cc me and
wait for my explicit Ack.

Is there a pressing need for this in 4.19?

-Saravana

> ---
>  drivers/phy/tegra/xusb.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c
> index dc22b1dd2c8ba..aa050aea2df58 100644
> --- a/drivers/phy/tegra/xusb.c
> +++ b/drivers/phy/tegra/xusb.c
> @@ -537,7 +537,7 @@ static int tegra_xusb_port_init(struct tegra_xusb_port *port,
>
>         device_initialize(&port->dev);
>         port->dev.type = &tegra_xusb_port_type;
> -       port->dev.of_node = of_node_get(np);
> +       device_set_node(&port->dev, of_fwnode_handle(of_node_get(np)));
>         port->dev.parent = padctl->dev;
>
>         err = dev_set_name(&port->dev, "%s-%u", name, index);
> --
> 2.43.0
>