diff mbox

[v2,09/18] batman-adv: Place kref_get for bla_claim near use

Message ID 1468597173-25378-9-git-send-email-sven@narfation.org (mailing list archive)
State Accepted, archived
Commit 7b229c7bfb382ec30d60b55b848b605bcc07029d
Delegated to: Marek Lindner
Headers

Commit Message

Sven Eckelmann July 15, 2016, 3:39 p.m. UTC 
  It is hard to understand why the refcnt is increased when it isn't done
near the actual place the new reference is used. So using kref_get right
before the place which requires the reference and in the same function
helps to avoid accidental problems causedy incorrect reference counting.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
---
v2:
 - split patch based on type

 net/batman-adv/bridge_loop_avoidance.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

Comments

Marek Lindner July 19, 2016, 8:29 a.m. UTC | #1 
On Friday, July 15, 2016 17:39:24 Sven Eckelmann wrote:
> It is hard to understand why the refcnt is increased when it isn't done
> near the actual place the new reference is used. So using kref_get right
> before the place which requires the reference and in the same function
> helps to avoid accidental problems causedy incorrect reference counting.
> 
> Signed-off-by: Sven Eckelmann <sven@narfation.org>
> ---
> v2:
>  - split patch based on type
> 
>  net/batman-adv/bridge_loop_avoidance.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)

Applied in revision 7b229c7.

Thanks,
Marek
diff mbox

Patch

diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c
index c75ef64..21bc3d0 100644
--- a/net/batman-adv/bridge_loop_avoidance.c
+++ b/net/batman-adv/bridge_loop_avoidance.c
@@ -711,12 +711,13 @@  static void batadv_bla_add_claim(struct batadv_priv *bat_priv,
 		claim->lasttime = jiffies;
 		kref_get(&backbone_gw->refcount);
 		claim->backbone_gw = backbone_gw;
-
 		kref_init(&claim->refcount);
-		kref_get(&claim->refcount);
+
 		batadv_dbg(BATADV_DBG_BLA, bat_priv,
 			   "bla_add_claim(): adding new entry %pM, vid %d to hash ...\n",
 			   mac, BATADV_PRINT_VID(vid));
+
+		kref_get(&claim->refcount);
 		hash_added = batadv_hash_add(bat_priv->bla.claim_hash,
 					     batadv_compare_claim,
 					     batadv_choose_claim, claim,