Hello Greg,
looks like the commit 8cc236db1a91 ("wwan: core: Fix missing
RTM_NEWLINK event for default link") already included in v5.14, see
details below the patch.
On Wed, Sep 15, 2021 at 3:54 PM <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> This is a note to let you know that I've just added the patch titled
>
> wwan: core: Fix missing RTM_NEWLINK event for default link
>
> to the 5.14-stable tree which can be found at:
> http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
>
> The filename of the patch is:
> wwan-core-fix-missing-rtm_newlink-event-for-default-link.patch
> and it can be found in the queue-5.14 subdirectory.
>
> If you, or anyone else, feels it should not be added to the stable tree,
> please let <stable@xxxxxxxxxxxxxxx> know about it.
>
>
> From 8cc236db1a91d0c91651595ba75942a583008455 Mon Sep 17 00:00:00 2001
> From: Loic Poulain <loic.poulain@xxxxxxxxxx>
> Date: Thu, 22 Jul 2021 20:21:05 +0200
> Subject: wwan: core: Fix missing RTM_NEWLINK event for default link
>
> From: Loic Poulain <loic.poulain@xxxxxxxxxx>
>
> commit 8cc236db1a91d0c91651595ba75942a583008455 upstream.
>
> A wwan link created via the wwan_create_default_link procedure is
> never notified to the user (RTM_NEWLINK), causing issues with user
> tools relying on such event to track network links (NetworkManager).
>
> This is because the procedure misses a call to rtnl_configure_link(),
> which sets the link as initialized and notifies the new link (cf
> proper usage in __rtnl_newlink()).
>
> Cc: stable@xxxxxxxxxxxxxxx
> Fixes: ca374290aaad ("wwan: core: support default netdev creation")
> Suggested-by: Sergey Ryazanov <ryazanov.s.a@xxxxxxxxx>
> Signed-off-by: Loic Poulain <loic.poulain@xxxxxxxxxx>
> Acked-by: Sergey Ryazanov <ryazanov.s.a@xxxxxxxxx>
> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> ---
> drivers/net/wwan/wwan_core.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> --- a/drivers/net/wwan/wwan_core.c
> +++ b/drivers/net/wwan/wwan_core.c
> @@ -990,6 +990,8 @@ static void wwan_create_default_link(str
>
> rtnl_configure_link(dev, NULL); /* Link initialized, notify new link */
>
> + rtnl_configure_link(dev, NULL); /* Link initialized, notify new link */
> +
> unlock:
> rtnl_unlock();
This change will duplicate the notification call. Fix already in v5.14:
$ git log --oneline v5.14 -- drivers/net/wwan/wwan_core.c
d9d5b8961284 wwan: core: Avoid returning NULL from wwan_create_dev()
68d1f1d4af18 wwan: core: Fix missing RTM_NEWLINK event for default link
> Patches currently in stable-queue which might be from loic.poulain@xxxxxxxxxx are
>
> queue-5.14/wwan-core-fix-missing-rtm_newlink-event-for-default-link.patch
> queue-5.14/wcn36xx-ensure-finish-scan-is-not-requested-before-start-scan.patch
--
Sergey
