linux-kernel - Re: linux-next: build failure after merge of the pm tree

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Date:	Mon, 09 Feb 2015 04:19:33 +0100
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>, linux-next@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	Jiang Liu <jiang.liu@...ux.intel.com>
Subject: Re: linux-next: build failure after merge of the pm tree

On Monday, February 09, 2015 01:26:42 PM Stephen Rothwell wrote:
> Hi Rafael,
> 
> After merging the pm tree, today's linux-next build (powerpc
> ppc64_defconfig) failed like this:
> 
> In file included from drivers/of/of_pci.c:1:0:
> drivers/of/of_pci.c: In function 'of_pci_get_host_bridge_resources':
> include/linux/list.h:447:43: error: dereferencing pointer to incomplete type
>   for (pos = list_first_entry(head, typeof(*pos), member); \
>                                            ^

[cut]

> 
> Caused by commit 14d76b68f281 ("PCI: Use common resource list
> management code instead of private implementation") interacting with
> commit d2be00c0fb5a ("of/pci: Free resources on failure in
> of_pci_get_host_bridge_resources()") from the pci tree.

Thanks for identifying this!

> I applied the following merge fix patch (which may need more work?).
> Someone needs to remember to tell Linus about this fix (or similar)
> when these trees get merged.

The patch looks correct to me, so I did the following.

I pulled the Bjorn's pci/host-generic branch that contained just that one
commit which conflicted with the Gerry's one into my acpi-resources branch
and folded the patch below into the merge.

> From: Stephen Rothwell <sfr@...b.auug.org.au>
> Date: Mon, 9 Feb 2015 13:08:24 +1100
> Subject: [PATCH] of/pci: fix up for "PCI: Use common resource list management
>  code instead of private implementation"
> 
> Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
> ---
>  drivers/of/of_pci.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c
> index 60dc36c865b5..110fece2ff53 100644
> --- a/drivers/of/of_pci.c
> +++ b/drivers/of/of_pci.c
> @@ -140,7 +140,7 @@ int of_pci_get_host_bridge_resources(struct device_node *dev,
>  			unsigned char busno, unsigned char bus_max,
>  			struct list_head *resources, resource_size_t *io_base)
>  {
> -	struct pci_host_bridge_window *window;
> +	struct resource_entry *window;
>  	struct resource *res;
>  	struct resource *bus_range;
>  	struct of_pci_range range;
> @@ -226,7 +226,7 @@ int of_pci_get_host_bridge_resources(struct device_node *dev,
>  conversion_failed:
>  	kfree(res);
>  parse_failed:
> -	list_for_each_entry(window, resources, list)
> +	resource_list_for_each_entry(window, resources)
>  		kfree(window->res);
>  	pci_free_resource_list(resources);
>  	kfree(bus_range);
> 

-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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