From: Johannes Berg <johannes@sipsolutions.net>
To: Bob Copeland <me@bobcopeland.com>
Cc: Henning Rogge <hrogge@gmail.com>,
linux-wireless@vger.kernel.org,
"David S. Miller" <davem@davemloft.net>,
Henning Rogge <henning.rogge@fkie.fraunhofer.de>
Subject: Re: [PATCH 1/2] mac80211: Remove connected MPP table entries with MPath
Date: Tue, 26 Jan 2016 22:31:29 +0100 [thread overview]
Message-ID: <1453843889.2759.78.camel@sipsolutions.net> (raw)
In-Reply-To: <20160126212221.GA5710@localhost> (sfid-20160126_222227_889414_A397F9B9)
On Tue, 2016-01-26 at 16:22 -0500, Bob Copeland wrote:
>
> void mesh_path_flush_by_nexthop(struct sta_info *sta)
> {
> [...]
> rhashtable_walk_start(&iter);
It seems you need to check the return value here?
> while ((mpath = rhashtable_walk_next(&iter))) {
> if (IS_ERR(mpath) && PTR_ERR(mpath) == -EAGAIN)
> continue;
> if (IS_ERR(mpath))
> break;
>
> if (rcu_access_pointer(mpath->next_hop) == sta)
> __mesh_path_del(tbl, mpath);
> }
> rhashtable_walk_stop(&iter);
> [...]
> }
>
> ...this still relies on the rcu read lock inside _walk_start and
> _walk_stop, though.
At least that's kinda hidden in walk_start/stop though ;-)
johannes
next prev parent reply other threads:[~2016-01-26 21:31 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-19 8:04 [PATCH 0/2] mac80211: add cleanup path for MPP table entries Henning Rogge
2016-01-19 8:04 ` [PATCH 1/2] mac80211: Remove connected MPP table entries with MPath Henning Rogge
2016-01-26 11:41 ` Johannes Berg
2016-01-26 18:36 ` Bob Copeland
2016-01-26 19:04 ` Henning Rogge
2016-01-26 20:53 ` Johannes Berg
2016-01-26 21:22 ` Bob Copeland
2016-01-26 21:31 ` Johannes Berg [this message]
2016-01-26 21:32 ` Johannes Berg
2016-01-26 21:44 ` Bob Copeland
2016-01-19 8:04 ` [PATCH 2/2] mac80211: let unused MPP table entries timeout Henning Rogge
2016-01-22 20:30 ` Bob Copeland
2016-01-23 9:39 ` Henning Rogge
2016-01-23 15:15 ` Bob Copeland
2016-01-24 17:53 ` Henning Rogge
2016-01-26 11:44 ` Johannes Berg
2016-01-26 19:54 ` Henning Rogge
2016-01-26 23:17 ` Bob Copeland
2016-01-28 13:44 ` [PATCH 0/2] mac80211: add cleanup path for MPP table entries Bob Copeland
2016-01-28 15:07 ` Henning Rogge
2016-01-28 15:12 ` Bob Copeland
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