RE: [PATCH] wifi: mac80211: fix mbss changed flags corruption on 32 bit systems

[Ping-Ke Shih <pkshih@realtek.com>]

Issam Hamdi <ih@simonwunderlich.de> wrote:
> diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
> index cb5f16366b9c..39cdbc11f540 100644
> --- a/net/mac80211/mesh.c
> +++ b/net/mac80211/mesh.c
> @@ -1164,7 +1164,7 @@ void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata,
>                 return;
> 
>         /* if we race with running work, worst case this work becomes a noop */
> -       for_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE)
> +       for_each_set_bit(bit, &bits, sizeof(bits) * BITS_PER_BYTE)
>                 set_bit(bit, ifmsh->mbss_changed);
>         set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags);
>         wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work);

The ifmsh->mbss_changed is defined as:
	unsigned long mbss_changed[64 / BITS_PER_LONG];

It seems like loop of for_each_set_bit() want to copy each bit of changed (u64). 
When shrink traversal size of for_each_set_bit() from sizeof(changed) to sizeof(bits), 
upper 32 bits of changed will not be copied to ifmsh->mbss_changed.
Will it be a problem?