Re: [PATCH v6 7/7] xen/arm: do not use void pointer in pci_host_common_probe

[Oleksandr Andrushchenko <Oleksandr_Andrushchenko@epam.com>]

Hi, Julien!

On 17.11.21 23:45, Julien Grall wrote:
> Hi Oleksandr,
>
> On 05/11/2021 06:33, Oleksandr Andrushchenko wrote:
>> From: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
>>
>> There is no reason to use void pointer while passing ECAM ops to the
>> pci_host_common_probe function as it is anyway casted to struct pci_ecam_ops
>> inside. For that reason remove the void pointer and pass struct pci_ecam_ops
>> pointer as is.
>>
>> Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
>
> I was going to ack and push the patch. But then I couldn't apply the patch...
>
>>
>> ---
>> New in v4
>> ---
>>   xen/arch/arm/pci/ecam.c            | 4 ++--
>>   xen/arch/arm/pci/pci-host-common.c | 6 ++----
>>   xen/include/asm-arm/pci.h          | 5 +++--
>>   3 files changed, 7 insertions(+), 8 deletions(-)
>>
>> diff --git a/xen/arch/arm/pci/ecam.c b/xen/arch/arm/pci/ecam.c
>> index 4f71b11c3057..6aeea12a68bf 100644
>> --- a/xen/arch/arm/pci/ecam.c
>> +++ b/xen/arch/arm/pci/ecam.c
>> @@ -24,8 +24,8 @@ void __iomem *pci_ecam_map_bus(struct pci_host_bridge *bridge,
>>                                  pci_sbdf_t sbdf, uint32_t where)
>>   {
>>       const struct pci_config_window *cfg = bridge->cfg;
>> -    struct pci_ecam_ops *ops =
>> -        container_of(bridge->ops, struct pci_ecam_ops, pci_ops);
>> +    const struct pci_ecam_ops *ops =
>> +        container_of(bridge->ops, const struct pci_ecam_ops, pci_ops);
>>       unsigned int devfn_shift = ops->bus_shift - 8;
>>       void __iomem *base;
>>   diff --git a/xen/arch/arm/pci/pci-host-common.c b/xen/arch/arm/pci/pci-host-common.c
>> index 6af845ab9d6c..1aad664b213e 100644
>> --- a/xen/arch/arm/pci/pci-host-common.c
>> +++ b/xen/arch/arm/pci/pci-host-common.c
>> @@ -194,15 +194,13 @@ static int pci_bus_find_domain_nr(struct dt_device_node *dev)
>>       return domain;
>>   }
>>   -int pci_host_common_probe(struct dt_device_node *dev, const void *data)
>> +int pci_host_common_probe(struct dt_device_node *dev,
>> +                          const struct pci_ecam_ops *ops)
>>   {
>>       struct pci_host_bridge *bridge;
>>       struct pci_config_window *cfg;
>> -    struct pci_ecam_ops *ops;
>>       int err;
>
> ... in staging, the code has an two additional lines here:
>
>     if ( dt_device_for_passthrough(dev) )
>         return 0;
>
> Is this series relying on patch that are not yet upstreamed?
Yes, I mistakenly had a patch below that I didn't want to upstream with
this series, so this is why. Sorry about that.
Frankly, I didn't expect patches to be merged from this series now as
1) I expect v7
2) I thought we won't push until the release

That being said: do you mind if I put your Acked-by in this patch, so
it is ready for v7?
>
> Cheers,
>
Thank you,
Oleksandr