Re: [PATCH] x86/PCI: add spinlock held check to'pcibios_fwaddrmap_lookup()'

[Jesse Barnes]

On Fri, 02 Mar 2012 12:45:01 -0700
Myron Stowe <myron.stowe@xxxxxxxxxx> wrote:

> 'pcibios_fwaddrmap_lookup()' is used to maintain FW-assigned BIOS BAR
> values for reinstatement when normal resource assignment attempts
> fail and must be called with the 'pcibios_fwaddrmap_lock' spinlock
> held.
> 
> This patch adds a WARN_ON notification if the spinlock is not currently
> held by the caller.
> 
> Signed-off-by: Myron Stowe <myron.stowe@xxxxxxxxxx>
> ---
> 
>  arch/x86/pci/i386.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c
> index 33e6a0b..831971e 100644
> --- a/arch/x86/pci/i386.c
> +++ b/arch/x86/pci/i386.c
> @@ -57,6 +57,8 @@ static struct pcibios_fwaddrmap *pcibios_fwaddrmap_lookup(struct pci_dev *dev)
>  {
>  	struct pcibios_fwaddrmap *map;
>  
> +	WARN_ON(!spin_is_locked(&pcibios_fwaddrmap_lock));
> +
>  	list_for_each_entry(map, &pcibios_fwaddrmappings, list)
>  		if (map->dev == dev)
>  			return map;
> 
> 

Applied, thanks.

-- 
Jesse Barnes, Intel Open Source Technology Center

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