linux-kernel - Re: [PATCH] misc: cxl: Use device_type helpers to access the node type

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Date:   Mon, 19 Nov 2018 11:27:07 +1100
From:   Andrew Donnellan <andrew.donnellan@....ibm.com>
To:     Rob Herring <robh@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Frederic Barrat <fbarrat@...ux.vnet.ibm.com>,
        Arnd Bergmann <arnd@...db.de>, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH] misc: cxl: Use device_type helpers to access the node
 type

On 17/11/18 9:11 am, Rob Herring wrote:
> Remove directly accessing device_node.type pointer and use the accessors
> instead. This will eventually allow removing the type pointer.
> 

This description doesn't quite match what's being fixed - we're not 
accessing the .type pointer, we're getting the device_type property 
directly.

> Cc: Frederic Barrat <fbarrat@...ux.vnet.ibm.com>
> Cc: Andrew Donnellan <andrew.donnellan@....ibm.com>
> Cc: Arnd Bergmann <arnd@...db.de>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: linuxppc-dev@...ts.ozlabs.org
> Signed-off-by: Rob Herring <robh@...nel.org>

Apart from that:

Acked-by: Andrew Donnellan <andrew.donnellan@....ibm.com>

> ---
>   drivers/misc/cxl/pci.c | 4 +---
>   1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c
> index b66d832d3233..c79ba1c699ad 100644
> --- a/drivers/misc/cxl/pci.c
> +++ b/drivers/misc/cxl/pci.c
> @@ -1718,7 +1718,6 @@ int cxl_slot_is_switched(struct pci_dev *dev)
>   {
>   	struct device_node *np;
>   	int depth = 0;
> -	const __be32 *prop;
>   
>   	if (!(np = pci_device_to_OF_node(dev))) {
>   		pr_err("cxl: np = NULL\n");
> @@ -1727,8 +1726,7 @@ int cxl_slot_is_switched(struct pci_dev *dev)
>   	of_node_get(np);
>   	while (np) {
>   		np = of_get_next_parent(np);
> -		prop = of_get_property(np, "device_type", NULL);
> -		if (!prop || strcmp((char *)prop, "pciex"))
> +		if (!of_node_is_type(np, "pciex"))
>   			break;
>   		depth++;
>   	}
> 

-- 
Andrew Donnellan              OzLabs, ADL Canberra
andrew.donnellan@....ibm.com  IBM Australia Limited