linux-kernel - Re: [PATCH wireless-next v2] wifi: ath12k: allocate dummy net

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Date: Wed, 8 May 2024 16:11:45 +0100
From: Simon Horman <horms@...nel.org>
To: Breno Leitao <leitao@...ian.org>
Cc: Kalle Valo <kvalo@...nel.org>, Jeff Johnson <jjohnson@...nel.org>,
	netdev@...r.kernel.org, linux-wireless@...r.kernel.org,
	ath12k@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH wireless-next v2] wifi: ath12k: allocate dummy net_device
 dynamically

On Wed, May 08, 2024 at 02:54:09AM -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 ath12k_ext_irq_grp by converting it
> into a pointer. Then use the leverage alloc_netdev_dummy() to allocate
> the net_device object at ath12k_pci_ext_irq_config().
> 
> The free of the device occurs at ath12k_pci_free_ext_irq().
> 
> [1] https://lore.kernel.org/all/20240229225910.79e224cf@kernel.org/
> 
> Signed-off-by: Breno Leitao <leitao@...ian.org>
> ---
> Changelog:
>  v2:
> 	* Free all the allocated dummy devices if one of them fails to
> 	  be allocated (in ath12k_pci_ext_irq_config()), as
> 	  pointed by by Simon Horman.

Thanks for the update.

Reviewed-by: Simon Horman <horms@...nel.org>