linux-kernel - Re: [PATCH 8/9] arch/powerpc/kernel: Drop unnecessary null test

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Message-ID: <20100803215137.GU26313@bicker>
Date:	Tue, 3 Aug 2010 23:51:38 +0200
From:	Dan Carpenter <error27@...il.com>
To:	Julia Lawall <julia@...u.dk>
Cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org,
	devicetree-discuss@...ts.ozlabs.org,
	kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 8/9] arch/powerpc/kernel: Drop unnecessary null test

On Tue, Aug 03, 2010 at 11:35:17PM +0200, Julia Lawall wrote:
> diff --git a/arch/powerpc/kernel/pci_of_scan.c b/arch/powerpc/kernel/pci_of_scan.c
> index 6ddb795..62dd363 100644
> --- a/arch/powerpc/kernel/pci_of_scan.c
> +++ b/arch/powerpc/kernel/pci_of_scan.c
> @@ -336,8 +336,7 @@ static void __devinit __of_scan_bus(struct device_node *node,
>  		if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
>  		    dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) {
>  			struct device_node *child = pci_device_to_OF_node(dev);
> -			if (dev)
> -				of_scan_pci_bridge(child, dev);
> +			of_scan_pci_bridge(child, dev);

The intention was probably to check "child" instead of "dev".
pci_device_to_OF_node() can return NULL.  On the other hand the code
has been this way for a year and no one has complained...

regards,
dan carpenter

>  		}
>  	}
>  }
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