Re: [PATCH v2 2/4] hpet: pass physical address, not entire hpet_data, to hpet_is_known()

[Venkatesh Pallipadi <venki@google.com>]

Acked-by: Venkatesh Pallipadi <venki@google.com>

On Thu, Mar 18, 2010 at 10:59 AM, Bjorn Helgaas <bjorn.helgaas@hp.com> wrote:
>
> No functional change; hpet_is_known() only needs the physical address,
> so supplying that instead of the whole struct hpet_data makes the callers
> a little simpler.
>
> Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
> Acked-by: Clemens Ladisch <clemens@ladisch.de>
> ---
>
>  drivers/char/hpet.c |   14 +++++---------
>  1 files changed, 5 insertions(+), 9 deletions(-)
>
>
> diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
> index 5cb05ed..d132fef 100644
> --- a/drivers/char/hpet.c
> +++ b/drivers/char/hpet.c
> @@ -662,12 +662,12 @@ static const struct file_operations hpet_fops = {
>        .mmap = hpet_mmap,
>  };
>
> -static int hpet_is_known(struct hpet_data *hdp)
> +static int hpet_is_known(unsigned long phys_address)
>  {
>        struct hpets *hpetp;
>
>        for (hpetp = hpets; hpetp; hpetp = hpetp->hp_next)
> -               if (hpetp->hp_hpet_phys == hdp->hd_phys_address)
> +               if (hpetp->hp_hpet_phys == phys_address)
>                        return 1;
>
>        return 0;
> @@ -788,7 +788,7 @@ int hpet_alloc(struct hpet_data *hdp)
>         * If platform dependent code has allocated the hpet that
>         * ACPI has also reported, then we catch it here.
>         */
> -       if (hpet_is_known(hdp)) {
> +       if (hpet_is_known(hdp->hd_phys_address)) {
>                printk(KERN_DEBUG "%s: duplicate HPET ignored\n",
>                        __func__);
>                return 0;
> @@ -909,12 +909,7 @@ static int hpet_pnp_add(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
>        memset(&data, 0, sizeof(data));
>
>        mem = pnp_get_resource(dev, IORESOURCE_MEM, 0);
> -       if (!mem)
> -               return -ENODEV;
> -
> -       data.hd_phys_address = mem->start;
> -
> -       if (hpet_is_known(&data))
> +       if (!mem || hpet_is_known(mem->start))
>                return -ENODEV;
>
>        i = 0;
> @@ -926,6 +921,7 @@ static int hpet_pnp_add(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
>        if (!data.hd_nirqs)
>                return -ENODEV;
>
> +       data.hd_phys_address = mem->start;
>        data.hd_address = ioremap(mem->start, resource_size(mem));
>
>        return hpet_alloc(&data);
>
>