linux-kernel - Re: [RFC PATCH 14/15] dt: Eliminate of_platform_{,un}register

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Date:	Wed, 23 Feb 2011 10:56:40 -0600
From:	Rob Herring <robherring2@...il.com>
To:	Grant Likely <grant.likely@...retlab.ca>
CC:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	devicetree-discuss@...ts.ozlabs.org, sfr@...b.auug.org.au,
	linux-kernel@...r.kernel.org, davem@...emloft.net,
	sparclinux@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [RFC PATCH 14/15] dt: Eliminate of_platform_{,un}register_driver

Grant,

On 02/22/2011 10:34 PM, Grant Likely wrote:
> Final step to eliminate of_platform_bus_type.  They're all just
> platform drivers now.
>
> Signed-off-by: Grant Likely<grant.likely@...retlab.ca>
> ---

snip

> diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
> index b6ae6e9..132951d 100644
> --- a/drivers/char/ipmi/ipmi_si_intf.c
> +++ b/drivers/char/ipmi/ipmi_si_intf.c
> @@ -2556,8 +2556,7 @@ static struct pci_driver ipmi_pci_driver = {
>
>
>   #ifdef CONFIG_PPC_OF
> -static int __devinit ipmi_of_probe(struct platform_device *dev,
> -			 const struct of_device_id *match)
> +static int __devinit ipmi_of_probe(struct platform_device *dev)
>   {
>   	struct smi_info *info;
>   	struct resource resource;
> @@ -2568,6 +2567,9 @@ static int __devinit ipmi_of_probe(struct platform_device *dev,
>
>   	dev_info(&dev->dev, "probing via device tree\n");
>
> +	if (!dev->dev.of_match)
> +		return -EINVAL;
> +
>   	ret = of_address_to_resource(np, 0,&resource);
>   	if (ret) {
>   		dev_warn(&dev->dev, PFX "invalid address from OF\n");
> @@ -2600,7 +2602,7 @@ static int __devinit ipmi_of_probe(struct platform_device *dev,
>   		return -ENOMEM;
>   	}
>
> -	info->si_type		= (enum si_type) match->data;
> +	info->si_type		= (enum si_type) dev->dev.of_match->data;
>   	info->addr_source	= SI_DEVICETREE;
>   	info->irq_setup		= std_irq_setup;
>
> @@ -2652,9 +2654,9 @@ static struct of_device_id ipmi_match[] =
>   	{},
>   };
>
> -static struct of_platform_driver ipmi_of_platform_driver = {
> +static struct platform_driver ipmi_of_platform_driver = {
>   	.driver = {
> -		.name = "ipmi",
> +		.name = "of-ipmi",
>   		.owner = THIS_MODULE,
>   		.of_match_table = ipmi_match,
>   	},
> @@ -3396,7 +3398,7 @@ static int __devinit init_ipmi_si(void)
>   #endif
>
>   #ifdef CONFIG_PPC_OF
> -	of_register_platform_driver(&ipmi_of_platform_driver);
> +	platform_driver_register(&ipmi_of_platform_driver);
>   	of_registered = 1;
>   #endif
>
> @@ -3457,7 +3459,7 @@ static int __devinit init_ipmi_si(void)
>
>   #ifdef CONFIG_PPC_OF
>   		if (of_registered)
> -			of_unregister_platform_driver(&ipmi_of_platform_driver);
> +			platform_driver_unregister(&ipmi_of_platform_driver);
>   #endif
>   		driver_unregister(&ipmi_driver.driver);
>   		printk(KERN_WARNING PFX
> @@ -3558,7 +3560,7 @@ static void __exit cleanup_ipmi_si(void)
>
>   #ifdef CONFIG_PPC_OF
>   	if (of_registered)
> -		of_unregister_platform_driver(&ipmi_of_platform_driver);
> +		platform_driver_unregister(&ipmi_of_platform_driver);
>   #endif
>
>   	mutex_lock(&smi_infos_lock);

Um, you are doing exactly what you said I should not do. Now the driver 
has 2 platform drivers defined. I have an updated patch that addresses 
your previous comments. I will send it out later today.

Rob
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