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batman-adv: Avoid spurious warnings from bat_v neigh_cmp implementation 

The neighbor compare API implementation for B.A.T.M.A.N. V checks whether
the neigh_ifinfo for this neighbor on a specific interface exists. A
warning is printed when it isn't found.

But it is not called inside a lock which would prevent that this
information is lost right before batadv_neigh_ifinfo_get. It must therefore
be expected that batadv_v_neigh_(cmp|is_sob) might not be able to get the
requested neigh_ifinfo.

A WARN_ON for such a situation seems not to be appropriate because this
will only flood the kernel logs. The warnings must therefore be removed.

Signed-off-by: Sven Eckelmann <sven.eckelmann@openmesh.com>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
This commit is contained in:
Sven Eckelmann 2017-10-16 09:31:47 +02:00 committed by Simon Wunderlich
parent bad5680b50
commit 6a4bc44b01
1 changed files with 4 additions and 5 deletions
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9
net/batman-adv/bat_v.c
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@ -19,7 +19,6 @@
#include "main.h"
#include <linux/atomic.h>
#include <linux/bug.h>
#include <linux/cache.h>
#include <linux/errno.h>
#include <linux/if_ether.h>
@ -623,11 +622,11 @@ static int batadv_v_neigh_cmp(struct batadv_neigh_node *neigh1,
int ret = 0;
ifinfo1 = batadv_neigh_ifinfo_get(neigh1, if_outgoing1);
if (WARN_ON(!ifinfo1))
if (!ifinfo1)
goto err_ifinfo1;
ifinfo2 = batadv_neigh_ifinfo_get(neigh2, if_outgoing2);
if (WARN_ON(!ifinfo2))
if (!ifinfo2)
goto err_ifinfo2;
ret = ifinfo1->bat_v.throughput - ifinfo2->bat_v.throughput;
@ -649,11 +648,11 @@ static bool batadv_v_neigh_is_sob(struct batadv_neigh_node *neigh1,
bool ret = false;
ifinfo1 = batadv_neigh_ifinfo_get(neigh1, if_outgoing1);
if (WARN_ON(!ifinfo1))
if (!ifinfo1)
goto err_ifinfo1;
ifinfo2 = batadv_neigh_ifinfo_get(neigh2, if_outgoing2);
if (WARN_ON(!ifinfo2))
if (!ifinfo2)
goto err_ifinfo2;
threshold = ifinfo1->bat_v.throughput / 4;