linux-kernel - Re: [PATCH RESEND net-next v5] IB/hfi1: allocate dummy net

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Date: Thu, 2 May 2024 17:42:58 +0300
From: Leon Romanovsky <leon@...nel.org>
To: Breno Leitao <leitao@...ian.org>
Cc: kuba@...nel.org, davem@...emloft.net, pabeni@...hat.com,
	edumazet@...gle.com,
	Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>,
	Jason Gunthorpe <jgg@...pe.ca>, netdev@...r.kernel.org,
	"open list:HFI1 DRIVER" <linux-rdma@...r.kernel.org>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH RESEND net-next v5] IB/hfi1: allocate dummy net_device
 dynamically

On Tue, Apr 30, 2024 at 09:22:11AM -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@...nelisnetworks.com>
> Signed-off-by: Breno Leitao <leitao@...ian.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(-)
> 

Thanks,
Acked-by: Leon Romanovsky <leon@...nel.org>