Re: [PATCH net-next] IB/hfi1: allocate dummy net_device dynamically

Re: [PATCH net-next] IB/hfi1: allocate dummy net_device dynamically

[Leon Romanovsky]

On Fri, Apr 26, 2024 at 01:56:05AM -0700, Breno Leitao wrote:
> Embedding net_device into structures prohibits the usage of flexible
> arrays in the net_device structure. For more details, see the discussion
> at [1].
> 
> Un-embed the net_device from struct hfi1_netdev_rx by converting it
> into a pointer. Then use the leverage alloc_netdev() to allocate the
> net_device object at hfi1_alloc_rx().
> 
> [1] https://lore.kernel.org/all/20240229225910.79e224cf@kernel.org/
> 
> Acked-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
> Signed-off-by: Breno Leitao <leitao@debian.org>
> ---
> Changelog
> 
> v5:
> 	* Basically replaced the old alloc_netdev() by the new helper
> 	  alloc_netdev_dummy().
> v4:
> 	* Fix the changelog format
> v3:
> 	* Re-worded the comment, by removing the first paragraph.
> v2:
> 	* Free struct hfi1_netdev_rx allocation if alloc_netdev() fails
> 	* Pass zero as the private size for alloc_netdev().
> 	* Remove wrong reference for iwl in the comments
> ---
> 
>  drivers/infiniband/hw/hfi1/netdev.h    | 2 +-
>  drivers/infiniband/hw/hfi1/netdev_rx.c | 9 +++++++--
>  2 files changed, 8 insertions(+), 3 deletions(-)

Dennis,

Do you plan to send anything to rdma-next which can potentially create
conflicts with netdev in this cycle?

If not, it will be safe to apply this patch directly to net-next.

Thanks

Re: [PATCH net-next] IB/hfi1: allocate dummy net_device dynamically

[Dennis Dalessandro]

On 4/30/24 8:50 AM, Leon Romanovsky wrote:
> On Fri, Apr 26, 2024 at 01:56:05AM -0700, Breno Leitao wrote:
>> Embedding net_device into structures prohibits the usage of flexible
>> arrays in the net_device structure. For more details, see the discussion
>> at [1].
>>
>> Un-embed the net_device from struct hfi1_netdev_rx by converting it
>> into a pointer. Then use the leverage alloc_netdev() to allocate the
>> net_device object at hfi1_alloc_rx().
>>
>> [1] https://lore.kernel.org/all/20240229225910.79e224cf@kernel.org/
>>
>> Acked-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
>> Signed-off-by: Breno Leitao <leitao@debian.org>
>> ---
>> Changelog
>>
>> v5:
>> 	* Basically replaced the old alloc_netdev() by the new helper
>> 	  alloc_netdev_dummy().
>> v4:
>> 	* Fix the changelog format
>> v3:
>> 	* Re-worded the comment, by removing the first paragraph.
>> v2:
>> 	* Free struct hfi1_netdev_rx allocation if alloc_netdev() fails
>> 	* Pass zero as the private size for alloc_netdev().
>> 	* Remove wrong reference for iwl in the comments
>> ---
>>
>>  drivers/infiniband/hw/hfi1/netdev.h    | 2 +-
>>  drivers/infiniband/hw/hfi1/netdev_rx.c | 9 +++++++--
>>  2 files changed, 8 insertions(+), 3 deletions(-)
> 
> Dennis,
> 
> Do you plan to send anything to rdma-next which can potentially create
> conflicts with netdev in this cycle?
> 
> If not, it will be safe to apply this patch directly to net-next.
> 
> Thanks

Nothing right now. Should be safe to sent to net-next.

FYI, since I talked about it publicly at the OFA Workshop recently. We will be
starting the upstream of support for our new HW, soon.

-Denny

Re: [PATCH net-next] IB/hfi1: allocate dummy net_device dynamically

[Leon Romanovsky]

On Tue, Apr 30, 2024 at 10:03:49AM -0400, Dennis Dalessandro wrote:
> On 4/30/24 8:50 AM, Leon Romanovsky wrote:
> > On Fri, Apr 26, 2024 at 01:56:05AM -0700, Breno Leitao wrote:
> >> Embedding net_device into structures prohibits the usage of flexible
> >> arrays in the net_device structure. For more details, see the discussion
> >> at [1].
> >>
> >> Un-embed the net_device from struct hfi1_netdev_rx by converting it
> >> into a pointer. Then use the leverage alloc_netdev() to allocate the
> >> net_device object at hfi1_alloc_rx().
> >>
> >> [1] https://lore.kernel.org/all/20240229225910.79e224cf@kernel.org/
> >>
> >> Acked-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
> >> Signed-off-by: Breno Leitao <leitao@debian.org>
> >> ---
> >> Changelog
> >>
> >> v5:
> >> 	* Basically replaced the old alloc_netdev() by the new helper
> >> 	  alloc_netdev_dummy().
> >> v4:
> >> 	* Fix the changelog format
> >> v3:
> >> 	* Re-worded the comment, by removing the first paragraph.
> >> v2:
> >> 	* Free struct hfi1_netdev_rx allocation if alloc_netdev() fails
> >> 	* Pass zero as the private size for alloc_netdev().
> >> 	* Remove wrong reference for iwl in the comments
> >> ---
> >>
> >>  drivers/infiniband/hw/hfi1/netdev.h    | 2 +-
> >>  drivers/infiniband/hw/hfi1/netdev_rx.c | 9 +++++++--
> >>  2 files changed, 8 insertions(+), 3 deletions(-)
> > 
> > Dennis,
> > 
> > Do you plan to send anything to rdma-next which can potentially create
> > conflicts with netdev in this cycle?
> > 
> > If not, it will be safe to apply this patch directly to net-next.
> > 
> > Thanks
> 
> Nothing right now. Should be safe to sent to net-next.

Jakub, can you please take this patch?

> 
> FYI, since I talked about it publicly at the OFA Workshop recently. We will be
> starting the upstream of support for our new HW, soon.

Great, thanks

> 
> -Denny

Re: [PATCH net-next] IB/hfi1: allocate dummy net_device dynamically

[Jakub Kicinski]

On Tue, 30 Apr 2024 17:10:39 +0300 Leon Romanovsky wrote:
> > Nothing right now. Should be safe to sent to net-next.  
> 
> Jakub, can you please take this patch?

We'll need a repost, it wasn't CCed to netdev.

Re: [PATCH net-next] IB/hfi1: allocate dummy net_device dynamically

[Breno Leitao]

On Tue, Apr 30, 2024 at 07:55:34AM -0700, Jakub Kicinski wrote:
> On Tue, 30 Apr 2024 17:10:39 +0300 Leon Romanovsky wrote:
> > > Nothing right now. Should be safe to sent to net-next.  
> > 
> > Jakub, can you please take this patch?
> 
> We'll need a repost, it wasn't CCed to netdev.

I can repost it and CC netdev.