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Date:   Tue, 9 Oct 2018 11:44:28 -0600
From:   Mathieu Poirier <mathieu.poirier@linaro.org>
To:     Silesh C V <svellattu@mvista.com>
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "Rafael J. Wysocki" <rafael@kernel.org>,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-i2c@vger.kernel.org, linux-rdma@vger.kernel.org,
        netdev@vger.kernel.org, devicetree@vger.kernel.org,
        linux-spi@vger.kernel.org, Wolfram Sang <wsa@the-dreams.de>,
        Lijun Ou <oulijun@huawei.com>,
        "Wei Hu(Xavier)" <xavier.huwei@huawei.com>,
        Yisen Zhuang <yisen.zhuang@huawei.com>,
        Salil Mehta <salil.mehta@huawei.com>,
        Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
        Andrew Lunn <andrew@lunn.ch>,
        Florian Fainelli <f.fainelli@gmail.com>,
        Rob Herring <robh+dt@kernel.org>,
        Frank Rowand <frowand.list@gmail.com>,
        Mark Brown <broonie@kernel.org>,
        "David S. Miller" <davem@davemloft.net>
Subject: Re: [PATCH v3 2/2] treewide: use bus_find_device_by_fwnode
Message-ID: <20181009174428.GB2182@xps15>
References: <1539080245-25818-1-git-send-email-svellattu@mvista.com>
 <1539080245-25818-2-git-send-email-svellattu@mvista.com>
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On Tue, Oct 09, 2018 at 03:47:25PM +0530, Silesh C V wrote:
> Use bus_find_device_by_fwnode helper to find the device having a
> specific firmware node on a bus.
> 
> Signed-off-by: Silesh C V <svellattu@mvista.com>
> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> Reviewed-by: Rob Herring <robh@kernel.org>
> ---
> Changes since v2:
> 	- Add Reviewed-by tags
> 
>  drivers/hwtracing/coresight/of_coresight.c         | 14 ++++----------
>  drivers/i2c/i2c-core-of.c                          |  9 ++-------
>  drivers/infiniband/hw/hns/hns_roce_hw_v1.c         |  8 +-------
>  drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c |  8 +-------
>  drivers/nvmem/core.c                               |  7 +------
>  drivers/of/of_mdio.c                               |  8 +-------
>  drivers/of/platform.c                              |  7 +------
>  drivers/spi/spi.c                                  | 10 +++-------
>  8 files changed, 14 insertions(+), 57 deletions(-)
> 
> diff --git a/drivers/hwtracing/coresight/of_coresight.c b/drivers/hwtracing/coresight/of_coresight.c
> index 6880bee..8193b50 100644
> --- a/drivers/hwtracing/coresight/of_coresight.c
> +++ b/drivers/hwtracing/coresight/of_coresight.c
> @@ -17,12 +17,6 @@
>  #include <linux/cpumask.h>
>  #include <asm/smp_plat.h>
>  
> -
> -static int of_dev_node_match(struct device *dev, void *data)
> -{
> -	return dev->of_node == data;
> -}
> -
>  static struct device *
>  of_coresight_get_endpoint_device(struct device_node *endpoint)
>  {
> @@ -32,8 +26,8 @@ static int of_dev_node_match(struct device *dev, void *data)
>  	 * If we have a non-configurable replicator, it will be found on the
>  	 * platform bus.
>  	 */
> -	dev = bus_find_device(&platform_bus_type, NULL,
> -			      endpoint, of_dev_node_match);
> +	dev = bus_find_device_by_fwnode(&platform_bus_type, NULL,
> +					&endpoint->fwnode);
>  	if (dev)
>  		return dev;
>  
> @@ -41,8 +35,8 @@ static int of_dev_node_match(struct device *dev, void *data)
>  	 * We have a configurable component - circle through the AMBA bus
>  	 * looking for the device that matches the endpoint node.
>  	 */
> -	return bus_find_device(&amba_bustype, NULL,
> -			       endpoint, of_dev_node_match);
> +	return bus_find_device_by_fwnode(&amba_bustype, NULL,
> +					&endpoint->fwnode);

This doesn't apply on linux-next.  This late in the cycle you may want to rebase
your work on that tree.

Otherwise and for the coresight part:

Tested-by: Mathieu Poirier <mathieu.poirier@linaro.org>

Mathieu

>  }
>  
>  static void of_coresight_get_ports(const struct device_node *node,
> diff --git a/drivers/i2c/i2c-core-of.c b/drivers/i2c/i2c-core-of.c
> index 6cb7ad6..2b8ef8d 100644
> --- a/drivers/i2c/i2c-core-of.c
> +++ b/drivers/i2c/i2c-core-of.c
> @@ -116,18 +116,13 @@ void of_i2c_register_devices(struct i2c_adapter *adap)
>  	of_node_put(bus);
>  }
>  
> -static int of_dev_node_match(struct device *dev, void *data)
> -{
> -	return dev->of_node == data;
> -}
> -
>  /* must call put_device() when done with returned i2c_client device */
>  struct i2c_client *of_find_i2c_device_by_node(struct device_node *node)
>  {
>  	struct device *dev;
>  	struct i2c_client *client;
>  
> -	dev = bus_find_device(&i2c_bus_type, NULL, node, of_dev_node_match);
> +	dev = bus_find_device_by_fwnode(&i2c_bus_type, NULL, &node->fwnode);
>  	if (!dev)
>  		return NULL;
>  
> @@ -145,7 +140,7 @@ struct i2c_adapter *of_find_i2c_adapter_by_node(struct device_node *node)
>  	struct device *dev;
>  	struct i2c_adapter *adapter;
>  
> -	dev = bus_find_device(&i2c_bus_type, NULL, node, of_dev_node_match);
> +	dev = bus_find_device_by_fwnode(&i2c_bus_type, NULL, &node->fwnode);
>  	if (!dev)
>  		return NULL;
>  
> diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
> index 081aa91..b0d418e 100644
> --- a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
> +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
> @@ -4832,19 +4832,13 @@ static void hns_roce_v1_cleanup_eq_table(struct hns_roce_dev *hr_dev)
>  };
>  MODULE_DEVICE_TABLE(acpi, hns_roce_acpi_match);
>  
> -static int hns_roce_node_match(struct device *dev, void *fwnode)
> -{
> -	return dev->fwnode == fwnode;
> -}
> -
>  static struct
>  platform_device *hns_roce_find_pdev(struct fwnode_handle *fwnode)
>  {
>  	struct device *dev;
>  
>  	/* get the 'device' corresponding to the matching 'fwnode' */
> -	dev = bus_find_device(&platform_bus_type, NULL,
> -			      fwnode, hns_roce_node_match);
> +	dev = bus_find_device_by_fwnode(&platform_bus_type, NULL, fwnode);
>  	/* get the platform device */
>  	return dev ? to_platform_device(dev) : NULL;
>  }
> diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c
> index 16294cd..d5d7c88 100644
> --- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c
> +++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c
> @@ -758,17 +758,11 @@ struct dsaf_misc_op *hns_misc_op_get(struct dsaf_device *dsaf_dev)
>  	return (void *)misc_op;
>  }
>  
> -static int hns_dsaf_dev_match(struct device *dev, void *fwnode)
> -{
> -	return dev->fwnode == fwnode;
> -}
> -
>  struct
>  platform_device *hns_dsaf_find_platform_device(struct fwnode_handle *fwnode)
>  {
>  	struct device *dev;
>  
> -	dev = bus_find_device(&platform_bus_type, NULL,
> -			      fwnode, hns_dsaf_dev_match);
> +	dev = bus_find_device_by_fwnode(&platform_bus_type, NULL, fwnode);
>  	return dev ? to_platform_device(dev) : NULL;
>  }
> diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
> index aa16578..b62f236 100644
> --- a/drivers/nvmem/core.c
> +++ b/drivers/nvmem/core.c
> @@ -262,11 +262,6 @@ static void nvmem_release(struct device *dev)
>  	.name		= "nvmem",
>  };
>  
> -static int of_nvmem_match(struct device *dev, void *nvmem_np)
> -{
> -	return dev->of_node == nvmem_np;
> -}
> -
>  static struct nvmem_device *of_nvmem_find(struct device_node *nvmem_np)
>  {
>  	struct device *d;
> @@ -274,7 +269,7 @@ static struct nvmem_device *of_nvmem_find(struct device_node *nvmem_np)
>  	if (!nvmem_np)
>  		return NULL;
>  
> -	d = bus_find_device(&nvmem_bus_type, NULL, nvmem_np, of_nvmem_match);
> +	d = bus_find_device_by_fwnode(&nvmem_bus_type, NULL, &nvmem_np->fwnode);
>  
>  	if (!d)
>  		return NULL;
> diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c
> index e92391d..2906a6b 100644
> --- a/drivers/of/of_mdio.c
> +++ b/drivers/of/of_mdio.c
> @@ -282,12 +282,6 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
>  }
>  EXPORT_SYMBOL(of_mdiobus_register);
>  
> -/* Helper function for of_phy_find_device */
> -static int of_phy_match(struct device *dev, void *phy_np)
> -{
> -	return dev->of_node == phy_np;
> -}
> -
>  /**
>   * of_phy_find_device - Give a PHY node, find the phy_device
>   * @phy_np: Pointer to the phy's device tree node
> @@ -303,7 +297,7 @@ struct phy_device *of_phy_find_device(struct device_node *phy_np)
>  	if (!phy_np)
>  		return NULL;
>  
> -	d = bus_find_device(&mdio_bus_type, NULL, phy_np, of_phy_match);
> +	d = bus_find_device_by_fwnode(&mdio_bus_type, NULL, &phy_np->fwnode);
>  	if (d) {
>  		mdiodev = to_mdio_device(d);
>  		if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY)
> diff --git a/drivers/of/platform.c b/drivers/of/platform.c
> index 6c59673..36dd58e 100644
> --- a/drivers/of/platform.c
> +++ b/drivers/of/platform.c
> @@ -37,11 +37,6 @@
>  	{} /* Empty terminated list */
>  };
>  
> -static int of_dev_node_match(struct device *dev, void *data)
> -{
> -	return dev->of_node == data;
> -}
> -
>  /**
>   * of_find_device_by_node - Find the platform_device associated with a node
>   * @np: Pointer to device tree node
> @@ -55,7 +50,7 @@ struct platform_device *of_find_device_by_node(struct device_node *np)
>  {
>  	struct device *dev;
>  
> -	dev = bus_find_device(&platform_bus_type, NULL, np, of_dev_node_match);
> +	dev = bus_find_device_by_fwnode(&platform_bus_type, NULL, &np->fwnode);
>  	return dev ? to_platform_device(dev) : NULL;
>  }
>  EXPORT_SYMBOL(of_find_device_by_node);
> diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
> index 9da0bc5..97128a5 100644
> --- a/drivers/spi/spi.c
> +++ b/drivers/spi/spi.c
> @@ -3324,16 +3324,12 @@ int spi_write_then_read(struct spi_device *spi,
>  /*-------------------------------------------------------------------------*/
>  
>  #if IS_ENABLED(CONFIG_OF_DYNAMIC)
> -static int __spi_of_device_match(struct device *dev, void *data)
> -{
> -	return dev->of_node == data;
> -}
> -
>  /* must call put_device() when done with returned spi_device device */
>  static struct spi_device *of_find_spi_device_by_node(struct device_node *node)
>  {
> -	struct device *dev = bus_find_device(&spi_bus_type, NULL, node,
> -						__spi_of_device_match);
> +	struct device *dev = bus_find_device_by_fwnode(&spi_bus_type, NULL,
> +							&node->fwnode);
> +
>  	return dev ? to_spi_device(dev) : NULL;
>  }
>  
> -- 
> 1.9.1
>