On Tue, Sep 18, 2012 at 12:51 PM, Joe Perches <joe@xxxxxxxxxxx> wrote:
> Get the compiler to verify the argument type of struct pci_dev *.
>
> Signed-off-by: Joe Perches <joe@xxxxxxxxxxx>
I applied this to my pci/misc branch as v3.8 material. Thanks!
> ---
>
> Another possible improvement is to range check index.
>
> include/linux/pci.h | 36 ++++++++++++++++++++++++++----------
> 1 files changed, 26 insertions(+), 10 deletions(-)
>
> diff --git a/include/linux/pci.h b/include/linux/pci.h
> index 5faa831..971d0e9 100644
> --- a/include/linux/pci.h
> +++ b/include/linux/pci.h
> @@ -1396,16 +1396,32 @@ static inline struct pci_dev *pci_dev_get(struct pci_dev *dev)
>
> /* these helpers provide future and backwards compatibility
> * for accessing popular PCI BAR info */
> -#define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
> -#define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
> -#define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
> -#define pci_resource_len(dev,bar) \
> - ((pci_resource_start((dev), (bar)) == 0 && \
> - pci_resource_end((dev), (bar)) == \
> - pci_resource_start((dev), (bar))) ? 0 : \
> - \
> - (pci_resource_end((dev), (bar)) - \
> - pci_resource_start((dev), (bar)) + 1))
> +static inline resource_size_t
> +pci_resource_start(const struct pci_dev *dev, int index)
> +{
> + return dev->resource[index].start;
> +}
> +
> +static inline resource_size_t
> +pci_resource_end(const struct pci_dev *dev, int index)
> +{
> + return dev->resource[index].end;
> +}
> +
> +static inline unsigned long
> +pci_resource_flags(const struct pci_dev *dev, int index)
> +{
> + return dev->resource[index].flags;
> +}
> +
> +static inline resource_size_t
> +pci_resource_len(const struct pci_dev *dev, int index)
> +{
> + if (pci_resource_start(dev, index) == 0 &&
> + pci_resource_end(dev, index) == 0)
> + return 0;
> + return resource_size(&dev->resource[index]);
> +}
>
> /* Similar to the helpers above, these manipulate per-pci_dev
> * driver-specific data. They are really just a wrapper around
>
>
>
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