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Date:   Thu, 12 Jan 2023 13:32:34 +0000
From:   Sakari Ailus <sakari.ailus@linux.intel.com>
To:     Pin-yen Lin <treapking@chromium.org>
Cc:     Andrzej Hajda <andrzej.hajda@intel.com>,
        Neil Armstrong <neil.armstrong@linaro.org>,
        Robert Foss <robert.foss@linaro.org>,
        Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
        Jonas Karlman <jonas@kwiboo.se>,
        Jernej Skrabec <jernej.skrabec@gmail.com>,
        David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        Daniel Scally <djrscally@gmail.com>,
        Heikki Krogerus <heikki.krogerus@linux.intel.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "Rafael J . Wysocki" <rafael@kernel.org>,
        Prashant Malani <pmalani@chromium.org>,
        Benson Leung <bleung@chromium.org>,
        Guenter Roeck <groeck@chromium.org>,
        Stephen Boyd <swboyd@chromium.org>,
        =?iso-8859-1?Q?N=EDcolas_F_=2E_R_=2E_A_=2E?= Prado 
        <nfraprado@collabora.com>, Marek Vasut <marex@denx.de>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>,
        devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org,
        Javier Martinez Canillas <javierm@redhat.com>,
        Lyude Paul <lyude@redhat.com>, chrome-platform@lists.linux.dev,
        Xin Ji <xji@analogixsemi.com>,
        Thomas Zimmermann <tzimmermann@suse.de>,
        linux-kernel@vger.kernel.org, Allen Chen <allen.chen@ite.com.tw>,
        linux-acpi@vger.kernel.org, Hsin-Yi Wang <hsinyi@chromium.org>,
        Chen-Yu Tsai <wenst@chromium.org>
Subject: Re: [PATCH v10 1/9] device property: Add remote endpoint to devcon
 matcher
Message-ID: <Y8AL8nTcNcl6zX7H@paasikivi.fi.intel.com>
References: <20230112042104.4107253-1-treapking@chromium.org>
 <20230112042104.4107253-2-treapking@chromium.org>
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Hi Pin-yen,

On Thu, Jan 12, 2023 at 12:20:56PM +0800, Pin-yen Lin wrote:
> From: Prashant Malani <pmalani@chromium.org>
> 
> When searching the device graph for device matches, check the
> remote-endpoint itself for a match.
> 
> Some drivers register devices for individual endpoints. This allows
> the matcher code to evaluate those for a match too, instead
> of only looking at the remote parent devices. This is required when a
> device supports two mode switches in its endpoints, so we can't simply
> register the mode switch with the parent node.
> 
> Signed-off-by: Prashant Malani <pmalani@chromium.org>
> Signed-off-by: Pin-yen Lin <treapking@chromium.org>
> Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
> Tested-by: Chen-Yu Tsai <wenst@chromium.org>
> 
> ---
> 
> Changes in v10:
> - Collected Reviewed-by and Tested-by tags
> 
> Changes in v6:
> - New in v6
> 
>  drivers/base/property.c | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/drivers/base/property.c b/drivers/base/property.c
> index 2a5a37fcd998..48877af4e444 100644
> --- a/drivers/base/property.c
> +++ b/drivers/base/property.c
> @@ -1223,6 +1223,21 @@ static unsigned int fwnode_graph_devcon_matches(struct fwnode_handle *fwnode,
>  			break;
>  		}
>  
> +		/*
> +		 * Some drivers may register devices for endpoints. Check
> +		 * the remote-endpoints for matches in addition to the remote
> +		 * port parent.
> +		 */
> +		node = fwnode_graph_get_remote_endpoint(ep);
> +		if (fwnode_device_is_available(node)) {
> +			ret = match(node, con_id, data);
> +			if (ret) {
> +				if (matches)
> +					matches[count] = ret;
> +				count++;
> +			}
> +		}

Aren't you missing fwnode_handle-put(node) here??

> +
>  		node = fwnode_graph_get_remote_port_parent(ep);
>  		if (!fwnode_device_is_available(node)) {
>  			fwnode_handle_put(node);

-- 
Kind regards,

Sakari Ailus