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kernel: fix igb crash if update_stats was often used.

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Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>
This commit is contained in:
Arne Fitzenreiter
2017-03-25 10:43:55 +01:00
parent a958faa4b8
commit d52f116913
2 changed files with 36 additions and 0 deletions
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33
src/patches/linux/linux-4.9.17-igb_fix_lock_at_update_stats.patch Normal file
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@@ -0,0 +1,33 @@
diff -Naur linux-4.9.17.org/drivers/net/ethernet/intel/igb/igb_main.c linux-4.9.17/drivers/net/ethernet/intel/igb/igb_main.c
--- linux-4.9.17.org/drivers/net/ethernet/intel/igb/igb_main.c 2017-03-22 12:44:07.000000000 +0100
+++ linux-4.9.17/drivers/net/ethernet/intel/igb/igb_main.c 2017-03-24 10:00:52.854812142 +0100
@@ -4609,9 +4609,10 @@
}
}
- spin_lock(&adapter->stats64_lock);
- igb_update_stats(adapter, &adapter->stats64);
- spin_unlock(&adapter->stats64_lock);
+ if (spin_trylock(&adapter->stats64_lock)) {
+ igb_update_stats(adapter, &adapter->stats64);
+ spin_unlock(&adapter->stats64_lock);
+ }
for (i = 0; i < adapter->num_tx_queues; i++) {
struct igb_ring *tx_ring = adapter->tx_ring[i];
@@ -5391,11 +5392,11 @@
{
struct igb_adapter *adapter = netdev_priv(netdev);
- spin_lock(&adapter->stats64_lock);
- igb_update_stats(adapter, &adapter->stats64);
+ if (spin_trylock(&adapter->stats64_lock)) {
+ igb_update_stats(adapter, &adapter->stats64);
+ spin_unlock(&adapter->stats64_lock);
+ }
memcpy(stats, &adapter->stats64, sizeof(*stats));
- spin_unlock(&adapter->stats64_lock);
-
return stats;
}