Re: [PATCH 16/21] patches: brcmfmac: fix netdev destructor

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On 9/18/2017 12:00 AM, Hauke Mehrtens wrote:
On 09/14/2017 09:21 AM, Johannes Berg wrote:
On Wed, 2017-09-13 at 21:36 +0200, Arend van Spriel wrote:

Way overdue, but better late than never.

No worries, I already applied the patch anyway ;-)

I think we prefer to use
spatch, but I understand the destructor handling in brcmfmac is
complicated.

Agree - and making changes across header files is hard in spatch.

I have no idea how to do this with spatch, I would appreciate if you
could convert this to an spatch, I do not know how.

No problem. Well, maybe it is, but I will give it a try ;-)

The story above does not tell it right. brcmf_add_if() is called
first
doing the alloc_netdev() setting needs_free_netdev to true and
subsequently brcmf_net_attach() is called doing the
register_netdevice(). When that is successful and only then I set
the
priv_destructor. The reason for this was to keep the error path
simple,
because when register_netdevice() fails it calls the priv_destructor
although that is not documented in struct net_device:

   *	@priv_destructor:	Called from unregister

Ok, too late now I guess, since the patch is in. But at least we'll
have your explanation here :)

I think I will make an attempt to change brcmfmac so we can get rid
of this patch file and rely on the spatch, but for now I am fine with
it.

Thanks for the review!

I fixed this patch in a later commit again, there was a problem with
recent kernel versions.

I saw that patch, but did not incorporate it in this response. Thanks for fixing it.

Regards,
Arend
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