[PATCH AUTOSEL 4.19 2/3] phy: tegra: xusb: Set fwnode for xusb port devices

[PATCH AUTOSEL 4.19 2/3] phy: tegra: xusb: Set fwnode for xusb port devices

[Sasha Levin]

From: Saravana Kannan <saravanak@google.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@nvidia.com>
Closes: https://lore.kernel.org/all/20240910130019.35081-1-jonathanh@nvidia.com/
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Suggested-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Signed-off-by: Saravana Kannan <saravanak@google.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20241024061347.1771063-3-saravanak@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 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 17211b31e1ed4..943dfff49592d 100644
--- a/drivers/phy/tegra/xusb.c
+++ b/drivers/phy/tegra/xusb.c
@@ -519,7 +519,7 @@ 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

Re: [PATCH AUTOSEL 4.19 2/3] phy: tegra: xusb: Set fwnode for xusb port devices

[Saravana Kannan]

On Wed, Dec 4, 2024 at 3:31 PM Sasha Levin <sashal@kernel.org> wrote:
>
> From: Saravana Kannan <saravanak@google.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@nvidia.com>
> Closes: https://lore.kernel.org/all/20240910130019.35081-1-jonathanh@nvidia.com/
> Tested-by: Jon Hunter <jonathanh@nvidia.com>
> Suggested-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
> Signed-off-by: Saravana Kannan <saravanak@google.com>
> Acked-by: Thierry Reding <treding@nvidia.com>
> Link: https://lore.kernel.org/r/20241024061347.1771063-3-saravanak@google.com
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Signed-off-by: Sasha Levin <sashal@kernel.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 17211b31e1ed4..943dfff49592d 100644
> --- a/drivers/phy/tegra/xusb.c
> +++ b/drivers/phy/tegra/xusb.c
> @@ -519,7 +519,7 @@ 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
>