linux-kernel - Re: [PATCH] ath10k: allocate dummy net

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Message-ID: <ZfsWgVeHJXMdh5bp@gmail.com>
Date: Wed, 20 Mar 2024 10:01:53 -0700
From: Breno Leitao <leitao@...ian.org>
To: Kalle Valo <kvalo@...nel.org>
Cc: Jeff Johnson <quic_jjohnson@...cinc.com>,
	Jeff Johnson <jjohnson@...nel.org>, kuba@...nel.org,
	keescook@...omium.org,
	"open list:NETWORKING DRIVERS (WIRELESS)" <linux-wireless@...r.kernel.org>,
	"open list:QUALCOMM ATHEROS ATH10K WIRELESS DRIVER" <ath10k@...ts.infradead.org>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ath10k: allocate dummy net_device dynamically

On Wed, Mar 20, 2024 at 05:25:52PM +0200, Kalle Valo wrote:
> Jeff Johnson <quic_jjohnson@...cinc.com> writes:
> 
> > On 3/19/2024 3:47 AM, 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 ath10k by converting it
> >> into a pointer. Then use the leverage alloc_netdev() to allocate the
> >> net_device object at ath10k_core_create(). The free of the device occurs
> >> at ath10k_core_destroy().
> >> 
> >> [1] https://lore.kernel.org/all/20240229225910.79e224cf@kernel.org/
> >> 
> >> Signed-off-by: Breno Leitao <leitao@...ian.org>
> >
> > NAK this based upon the ath11k patch results.
> >
> > As suggested there we should just use kmalloc/kfree to match the existing logic.
> 
> BTW if the patch is not tested on a real device then it's good to
> document that in the commit message with "Compile tested only" or
> similar.

Good to know. Thanks. I will add it to the next patches.