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| author |   Sasha Levin <sasha.levin@oracle.com> | 2015-08-13 14:03:16 -0400 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2015-08-13 21:40:57 -0700 |
| commit | da65ad1fe399d77234a4caa50008c6b87f1fe401 (patch) | |
| tree | d000a9bf25ed974f828c7314e0eb2fd51beca21b /net | |
| parent | Merge branch 'mv88e6xxx-hw-vlan' (diff) | |
| download | linux-dev-da65ad1fe399d77234a4caa50008c6b87f1fe401.tar.xz linux-dev-da65ad1fe399d77234a4caa50008c6b87f1fe401.zip | |
net: allow sleeping when modifying store_rps_map
Commit 10e4ea751 ("net: Fix race condition in store_rps_map") has moved the
manipulation of the rps_needed jump label under a spinlock. Since changing
the state of a jump label may sleep this is incorrect and causes warnings
during runtime.
Make rps_map_lock a mutex to allow sleeping under it.
Fixes: 10e4ea751 ("net: Fix race condition in store_rps_map")
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Acked-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/net-sysfs.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c index 39ec6949c1e6..b279077c3089 100644 --- a/net/core/net-sysfs.c +++ b/net/core/net-sysfs.c @@ -689,7 +689,7 @@ static ssize_t store_rps_map(struct netdev_rx_queue *queue, struct rps_map *old_map, *map; cpumask_var_t mask; int err, cpu, i; - static DEFINE_SPINLOCK(rps_map_lock); + static DEFINE_MUTEX(rps_map_mutex); if (!capable(CAP_NET_ADMIN)) return -EPERM; @@ -722,9 +722,9 @@ static ssize_t store_rps_map(struct netdev_rx_queue *queue, map = NULL; } - spin_lock(&rps_map_lock); + mutex_lock(&rps_map_mutex); old_map = rcu_dereference_protected(queue->rps_map, - lockdep_is_held(&rps_map_lock)); + mutex_is_locked(&rps_map_mutex)); rcu_assign_pointer(queue->rps_map, map); if (map) @@ -732,7 +732,7 @@ static ssize_t store_rps_map(struct netdev_rx_queue *queue, if (old_map) static_key_slow_dec(&rps_needed); - spin_unlock(&rps_map_lock); + mutex_unlock(&rps_map_mutex); if (old_map) kfree_rcu(old_map, rcu); |