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authorScott Feldman <scofeldm@cisco.com>2009-09-03 17:02:14 +0000
committerDavid S. Miller <davem@davemloft.net>2009-09-03 20:19:17 -0700
commit56ac88b38e5918d92bdfc97c528068e45ff4581c (patch)
tree9a087772b5f76379b812bd93feeda44374970ae2 /drivers/net/enic
parentd19e22dc2c1c43724c1d9ce4a5456ae74eeb6da8 (diff)
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enic: bug fix: protect fw call i/f with spinlock
Some driver -> nic firmware calls weren't guarded with a spinlock, exposing the call i/f to a race between two threads Signed-off-by: Scott Feldman <scofeldm@cisco.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/enic')
-rw-r--r--drivers/net/enic/enic_main.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c
index 73f0107..36cf0fc 100644
--- a/drivers/net/enic/enic_main.c
+++ b/drivers/net/enic/enic_main.c
@@ -1316,6 +1316,7 @@ static int enic_notify_set(struct enic *enic)
{
int err;
+ spin_lock(&enic->devcmd_lock);
switch (vnic_dev_get_intr_mode(enic->vdev)) {
case VNIC_DEV_INTR_MODE_INTX:
err = vnic_dev_notify_set(enic->vdev, ENIC_INTX_NOTIFY);
@@ -1327,6 +1328,7 @@ static int enic_notify_set(struct enic *enic)
err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
break;
}
+ spin_unlock(&enic->devcmd_lock);
return err;
}
@@ -1380,12 +1382,16 @@ static int enic_open(struct net_device *netdev)
for (i = 0; i < enic->rq_count; i++)
vnic_rq_enable(&enic->rq[i]);
+ spin_lock(&enic->devcmd_lock);
enic_add_station_addr(enic);
+ spin_unlock(&enic->devcmd_lock);
enic_set_multicast_list(netdev);
netif_wake_queue(netdev);
napi_enable(&enic->napi);
+ spin_lock(&enic->devcmd_lock);
vnic_dev_enable(enic->vdev);
+ spin_unlock(&enic->devcmd_lock);
for (i = 0; i < enic->intr_count; i++)
vnic_intr_unmask(&enic->intr[i]);
@@ -1395,7 +1401,9 @@ static int enic_open(struct net_device *netdev)
return 0;
err_out_notify_unset:
+ spin_lock(&enic->devcmd_lock);
vnic_dev_notify_unset(enic->vdev);
+ spin_unlock(&enic->devcmd_lock);
err_out_free_intr:
enic_free_intr(enic);
@@ -1411,7 +1419,9 @@ static int enic_stop(struct net_device *netdev)
del_timer_sync(&enic->notify_timer);
+ spin_lock(&enic->devcmd_lock);
vnic_dev_disable(enic->vdev);
+ spin_unlock(&enic->devcmd_lock);
napi_disable(&enic->napi);
netif_stop_queue(netdev);
@@ -1429,7 +1439,9 @@ static int enic_stop(struct net_device *netdev)
return err;
}
+ spin_lock(&enic->devcmd_lock);
vnic_dev_notify_unset(enic->vdev);
+ spin_unlock(&enic->devcmd_lock);
enic_free_intr(enic);
(void)vnic_cq_service(&enic->cq[ENIC_CQ_RQ],