Re: [PATCH v2] IB/hfi1: allocate dummy net_device dynamically
From: Leon Romanovsky
Date: Sun Mar 17 2024 - 04:42:03 EST
On Fri, Mar 15, 2024 at 10:51:46AM -0700, Breno Leitao wrote:
> On Fri, Mar 15, 2024 at 12:12:15PM -0400, Dennis Dalessandro wrote:
> > On 3/13/24 6:33 AM, Breno Leitao wrote:
> > > struct net_device shouldn't be embedded into any structure, instead,
> > > the owner should use the priv space to embed their state into net_device.
> > >
> > > 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@xxxxxxxxxx/
> > >
> > > Signed-off-by: Breno Leitao <leitao@xxxxxxxxxx>
> > >
> > > ----
> > > PS: this diff needs d160c66cda0ac8614 ("net: Do not return value from
> > > init_dummy_netdev()") in order to apply and build cleanly.
> > > ---
> > > Changelog:
> > >
> > > 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
> > > ---
> >
> > Very lightly tested, but interface came up and I could send traffic. Code seems
> > OK too.
> >
> > I'd prefer to at least remove the first sentence of the commit message.
>
> That is OK for me. Would you like to remove it when merging it, or,
> would you prefer me to resend it?
Please resend together with Dennis's Acked-by.
Thanks
>
> Thanks