On Tue, 7 Sep 2010 17:25:20 -0700
Chris Wright <chrisw@xxxxxxxxxxxx> wrote:
> From: Cam Macdonell <cam@xxxxxxxxxxxxxx>
>
> * Cam Macdonell (cam@xxxxxxxxxxxxxx) wrote:
> > It seems it was the alignment value being passed back from
> > pci_resource_alignment(). The return type is an int, which was
> > causing value of 2GB to be sign extended to to 0xffffffff80000000.
> > Changing the return type to resource_size_t allows BAR values >= 2GB
> > to be successfully assigned.
> <snip>
> > -static inline int pci_resource_alignment(struct pci_dev *dev,
> > +static inline resource_size_t pci_resource_alignment(struct pci_dev *dev,
> > struct resource *res)
>
> Yes, that's my mistake. Thanks for debugging the issue Cam.
> This fixes the prototype for both pci_resource_alignment() and
> pci_sriov_resource_alignment().
>
> Patch started as debugging effort from Cam Macdonell.
>
> Cc: Cam Macdonell <cam@xxxxxxxxxxxxxx>
> Cc: Avi Kivity <avi@xxxxxxxxxx>
> Cc: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
> [chrisw: add iov bits]
> Signed-off-by: Chris Wright <chrisw@xxxxxxxxxxxx>
> ---
> drivers/pci/iov.c | 2 +-
> drivers/pci/pci.h | 5 +++--
> 2 files changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
> index ce6a366..553d8ee 100644
> --- a/drivers/pci/iov.c
> +++ b/drivers/pci/iov.c
> @@ -608,7 +608,7 @@ int pci_iov_resource_bar(struct pci_dev *dev, int resno,
> * the VF BAR size multiplied by the number of VFs. The alignment
> * is just the VF BAR size.
> */
> -int pci_sriov_resource_alignment(struct pci_dev *dev, int resno)
> +resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno)
> {
> struct resource tmp;
> enum pci_bar_type type;
> diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
> index 679c39d..5d0aeb1 100644
> --- a/drivers/pci/pci.h
> +++ b/drivers/pci/pci.h
> @@ -262,7 +262,8 @@ extern int pci_iov_init(struct pci_dev *dev);
> extern void pci_iov_release(struct pci_dev *dev);
> extern int pci_iov_resource_bar(struct pci_dev *dev, int resno,
> enum pci_bar_type *type);
> -extern int pci_sriov_resource_alignment(struct pci_dev *dev, int resno);
> +extern resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev,
> + int resno);
> extern void pci_restore_iov_state(struct pci_dev *dev);
> extern int pci_iov_bus_range(struct pci_bus *bus);
>
> @@ -318,7 +319,7 @@ static inline int pci_ats_enabled(struct pci_dev *dev)
> }
> #endif /* CONFIG_PCI_IOV */
>
> -static inline int pci_resource_alignment(struct pci_dev *dev,
> +static inline resource_size_t pci_resource_alignment(struct pci_dev *dev,
> struct resource *res)
> {
> #ifdef CONFIG_PCI_IOV
>
>
Applied to my for-linus branch, thanks.
--
Jesse Barnes, Intel Open Source Technology Center
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