diff options
author | Tony Camuso <tcamuso@redhat.com> | 2014-06-23 16:08:03 +0530 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2014-06-23 14:32:19 -0700 |
commit | 8e091340cfcd6f96ca0dddb078ce28c407a6d44c (patch) | |
tree | 8423186f4faf1236c4f2ed3bfc01b69008782aff /drivers/net/ethernet/cisco/enic/enic_dev.c | |
parent | a145df23ef32c7b933875f334ba28791ee75766e (diff) |
enic: fix lockdep around devcmd_lock
We were experiencing occasional "BUG: scheduling while atomic" splats
in our testing. Enabling DEBUG_SPINLOCK and DEBUG_LOCKDEP in the kernel
exposed a lockdep in the enic driver.
enic 0000:0b:00.0 eth2: Link UP
======================================================
[ INFO: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected ]
3.12.0-rc1.x86_64-dbg+ #2 Tainted: GF W
------------------------------------------------------
NetworkManager/4209 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire:
(&(&enic->devcmd_lock)->rlock){+.+...}, at: [<ffffffffa026b7e4>] enic_dev_packet_filter+0x44/0x90 [enic]
The fix was to replace spin_lock with spin_lock_bh for the enic
devcmd_lock, so that soft irqs would be disabled while the lock
is held.
Signed-off-by: Sujith Sankar <ssujith@cisco.com>
Signed-off-by: Tony Camuso <tcamuso@redhat.com>
Signed-off-by: Govindarajulu Varadarajan <_govind@gmx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/cisco/enic/enic_dev.c')
-rw-r--r-- | drivers/net/ethernet/cisco/enic/enic_dev.c | 80 |
1 files changed, 40 insertions, 40 deletions
diff --git a/drivers/net/ethernet/cisco/enic/enic_dev.c b/drivers/net/ethernet/cisco/enic/enic_dev.c index 3e27df522847..87ddc44b590e 100644 --- a/drivers/net/ethernet/cisco/enic/enic_dev.c +++ b/drivers/net/ethernet/cisco/enic/enic_dev.c @@ -29,9 +29,9 @@ int enic_dev_fw_info(struct enic *enic, struct vnic_devcmd_fw_info **fw_info) { int err; - spin_lock(&enic->devcmd_lock); + spin_lock_bh(&enic->devcmd_lock); err = vnic_dev_fw_info(enic->vdev, fw_info); - spin_unlock(&enic->devcmd_lock); + spin_unlock_bh(&enic->devcmd_lock); return err; } @@ -40,9 +40,9 @@ int enic_dev_stats_dump(struct enic *enic, struct vnic_stats **vstats) { int err; - spin_lock(&enic->devcmd_lock); + spin_lock_bh(&enic->devcmd_lock); err = vnic_dev_stats_dump(enic->vdev, vstats); - spin_unlock(&enic->devcmd_lock); + spin_unlock_bh(&enic->devcmd_lock); return err; } @@ -54,9 +54,9 @@ int enic_dev_add_station_addr(struct enic *enic) if (!is_valid_ether_addr(enic->netdev->dev_addr)) return -EADDRNOTAVAIL; - spin_lock(&enic->devcmd_lock); + spin_lock_bh(&enic->devcmd_lock); err = vnic_dev_add_addr(enic->vdev, enic->netdev->dev_addr); - spin_unlock(&enic->devcmd_lock); + spin_unlock_bh(&enic->devcmd_lock); return err; } @@ -68,9 +68,9 @@ int enic_dev_del_station_addr(struct enic *enic) if (!is_valid_ether_addr(enic->netdev->dev_addr)) return -EADDRNOTAVAIL; - spin_lock(&enic->devcmd_lock); + spin_lock_bh(&enic->devcmd_lock); err = vnic_dev_del_addr(enic->vdev, enic->netdev->dev_addr); - spin_unlock(&enic->devcmd_lock); + spin_unlock_bh(&enic->devcmd_lock); return err; } @@ -80,10 +80,10 @@ int enic_dev_packet_filter(struct enic *enic, int directed, int multicast, { int err; - spin_lock(&enic->devcmd_lock); + spin_lock_bh(&enic->devcmd_lock); err = vnic_dev_packet_filter(enic->vdev, directed, multicast, broadcast, promisc, allmulti); - spin_unlock(&enic->devcmd_lock); + spin_unlock_bh(&enic->devcmd_lock); return err; } @@ -92,9 +92,9 @@ int enic_dev_add_addr(struct enic *enic, const u8 *addr) { int err; - spin_lock(&enic->devcmd_lock); + spin_lock_bh(&enic->devcmd_lock); err = vnic_dev_add_addr(enic->vdev, addr); - spin_unlock(&enic->devcmd_lock); + spin_unlock_bh(&enic->devcmd_lock); return err; } @@ -103,9 +103,9 @@ int enic_dev_del_addr(struct enic *enic, const u8 *addr) { int err; - spin_lock(&enic->devcmd_lock); + spin_lock_bh(&enic->devcmd_lock); err = vnic_dev_del_addr(enic->vdev, addr); - spin_unlock(&enic->devcmd_lock); + spin_unlock_bh(&enic->devcmd_lock); return err; } @@ -114,9 +114,9 @@ int enic_dev_notify_unset(struct enic *enic) { int err; - spin_lock(&enic->devcmd_lock); + spin_lock_bh(&enic->devcmd_lock); err = vnic_dev_notify_unset(enic->vdev); - spin_unlock(&enic->devcmd_lock); + spin_unlock_bh(&enic->devcmd_lock); return err; } @@ -125,9 +125,9 @@ int enic_dev_hang_notify(struct enic *enic) { int err; - spin_lock(&enic->devcmd_lock); + spin_lock_bh(&enic->devcmd_lock); err = vnic_dev_hang_notify(enic->vdev); - spin_unlock(&enic->devcmd_lock); + spin_unlock_bh(&enic->devcmd_lock); return err; } @@ -136,10 +136,10 @@ int enic_dev_set_ig_vlan_rewrite_mode(struct enic *enic) { int err; - spin_lock(&enic->devcmd_lock); + spin_lock_bh(&enic->devcmd_lock); err = vnic_dev_set_ig_vlan_rewrite_mode(enic->vdev, IG_VLAN_REWRITE_MODE_PRIORITY_TAG_DEFAULT_VLAN); - spin_unlock(&enic->devcmd_lock); + spin_unlock_bh(&enic->devcmd_lock); return err; } @@ -148,9 +148,9 @@ int enic_dev_enable(struct enic *enic) { int err; - spin_lock(&enic->devcmd_lock); + spin_lock_bh(&enic->devcmd_lock); err = vnic_dev_enable_wait(enic->vdev); - spin_unlock(&enic->devcmd_lock); + spin_unlock_bh(&enic->devcmd_lock); return err; } @@ -159,9 +159,9 @@ int enic_dev_disable(struct enic *enic) { int err; - spin_lock(&enic->devcmd_lock); + spin_lock_bh(&enic->devcmd_lock); err = vnic_dev_disable(enic->vdev); - spin_unlock(&enic->devcmd_lock); + spin_unlock_bh(&enic->devcmd_lock); return err; } @@ -170,9 +170,9 @@ int enic_dev_intr_coal_timer_info(struct enic *enic) { int err; - spin_lock(&enic->devcmd_lock); + spin_lock_bh(&enic->devcmd_lock); err = vnic_dev_intr_coal_timer_info(enic->vdev); - spin_unlock(&enic->devcmd_lock); + spin_unlock_bh(&enic->devcmd_lock); return err; } @@ -181,9 +181,9 @@ int enic_vnic_dev_deinit(struct enic *enic) { int err; - spin_lock(&enic->devcmd_lock); + spin_lock_bh(&enic->devcmd_lock); err = vnic_dev_deinit(enic->vdev); - spin_unlock(&enic->devcmd_lock); + spin_unlock_bh(&enic->devcmd_lock); return err; } @@ -192,10 +192,10 @@ int enic_dev_init_prov2(struct enic *enic, struct vic_provinfo *vp) { int err; - spin_lock(&enic->devcmd_lock); + spin_lock_bh(&enic->devcmd_lock); err = vnic_dev_init_prov2(enic->vdev, (u8 *)vp, vic_provinfo_size(vp)); - spin_unlock(&enic->devcmd_lock); + spin_unlock_bh(&enic->devcmd_lock); return err; } @@ -204,9 +204,9 @@ int enic_dev_deinit_done(struct enic *enic, int *status) { int err; - spin_lock(&enic->devcmd_lock); + spin_lock_bh(&enic->devcmd_lock); err = vnic_dev_deinit_done(enic->vdev, status); - spin_unlock(&enic->devcmd_lock); + spin_unlock_bh(&enic->devcmd_lock); return err; } @@ -217,9 +217,9 @@ int enic_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid) struct enic *enic = netdev_priv(netdev); int err; - spin_lock(&enic->devcmd_lock); + spin_lock_bh(&enic->devcmd_lock); err = enic_add_vlan(enic, vid); - spin_unlock(&enic->devcmd_lock); + spin_unlock_bh(&enic->devcmd_lock); return err; } @@ -230,9 +230,9 @@ int enic_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid) struct enic *enic = netdev_priv(netdev); int err; - spin_lock(&enic->devcmd_lock); + spin_lock_bh(&enic->devcmd_lock); err = enic_del_vlan(enic, vid); - spin_unlock(&enic->devcmd_lock); + spin_unlock_bh(&enic->devcmd_lock); return err; } @@ -241,9 +241,9 @@ int enic_dev_enable2(struct enic *enic, int active) { int err; - spin_lock(&enic->devcmd_lock); + spin_lock_bh(&enic->devcmd_lock); err = vnic_dev_enable2(enic->vdev, active); - spin_unlock(&enic->devcmd_lock); + spin_unlock_bh(&enic->devcmd_lock); return err; } @@ -252,9 +252,9 @@ int enic_dev_enable2_done(struct enic *enic, int *status) { int err; - spin_lock(&enic->devcmd_lock); + spin_lock_bh(&enic->devcmd_lock); err = vnic_dev_enable2_done(enic->vdev, status); - spin_unlock(&enic->devcmd_lock); + spin_unlock_bh(&enic->devcmd_lock); return err; } |