netdev - Re: [PATCH net,v2] wifi: mac80211: fix WARNING in ieee80211_link_info_change

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Date: Fri, 01 Sep 2023 11:19:35 +0200
From: Johannes Berg <johannes@...solutions.net>
To: shaozhengchao <shaozhengchao@...wei.com>,
 linux-wireless@...r.kernel.org,  netdev@...r.kernel.org,
 davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, 
 pabeni@...hat.com
Cc: weiyongjun1@...wei.com, yuehaibing@...wei.com
Subject: Re: [PATCH net,v2] wifi: mac80211: fix WARNING in
 ieee80211_link_info_change_notify()

Hi,


> 	Do you mean it shouldn't be allowed to set mcast rate when dev
> is stopped,
> 

Probably?

>  as in the following code?
> 
> --- a/net/wireless/rdev-ops.h
> +++ b/net/wireless/rdev-ops.h
> @@ -1229,7 +1229,7 @@ rdev_set_mcast_rate(struct 
> cfg80211_registered_device *rdev,
>          int ret = -ENOTSUPP;
> 
>          trace_rdev_set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
> -       if (rdev->ops->set_mcast_rate)
> +       if (rdev->ops->set_mcast_rate && netif_running(dev))
>                  ret = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, 
> 

Certainly not. Please don't do random patches without looking at the
subsystem as a whole. If you don't want to take the time to understand
how things work in wireless, then better don't send patches at all.

johannes