2023-09-01 17:08:50

by shaozhengchao

[permalink] [raw]
Subject: Re: [PATCH net,v2] wifi: mac80211: fix WARNING in ieee80211_link_info_change_notify()



On 2023/9/1 17:19, Johannes Berg wrote:
> 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

Hi johannes:
It's a little difficult for me to solve this warning. This
warning has been going on for more than one year. Could you help solve
it? Thank you.

links:
https://groups.google.com/g/syzkaller-bugs/c/FofxpVlkONg/m/v296EFNnAAAJ

Zhengchao Shao