diff options
| author |   Jason Gunthorpe <jgg@mellanox.com> | 2018-07-29 11:34:57 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2018-08-02 20:27:43 -0600 |
| commit | ee190ab734ba4d3c7887bd193ce8124385738e44 (patch) | |
| tree | 53ebb12de34e3032a59e0e19dde5bdfe42a5b503 /drivers/infiniband/ulp/ipoib/ipoib_main.c | |
| parent | RDMA/netdev: Use priv_destructor for netdev cleanup (diff) | |
| download | linux-dev-ee190ab734ba4d3c7887bd193ce8124385738e44.tar.xz linux-dev-ee190ab734ba4d3c7887bd193ce8124385738e44.zip | |
IB/ipoib: Get rid of the sysfs_mutex
This mutex was introduced to deal with the deadlock formed by calling
unregister_netdev from within the sysfs callback of a netdev.
Now that we have priv_destructor and needs_free_netdev we can switch
to the more targeted solution of running the unregister from a
work queue. This avoids the deadlock and gets rid of the mutex.
The next patch in the series needs this mutex eliminated to create
atomicity of unregisteration.
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Diffstat (limited to 'drivers/infiniband/ulp/ipoib/ipoib_main.c')
| -rw-r--r-- | drivers/infiniband/ulp/ipoib/ipoib_main.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c index 73d917d57f93..e9f4f261fe20 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_main.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c @@ -2079,7 +2079,6 @@ static void ipoib_build_priv(struct net_device *dev) spin_lock_init(&priv->lock); init_rwsem(&priv->vlan_rwsem); mutex_init(&priv->mcast_mutex); - mutex_init(&priv->sysfs_mutex); INIT_LIST_HEAD(&priv->path_list); INIT_LIST_HEAD(&priv->child_intfs); @@ -2476,10 +2475,7 @@ static void ipoib_remove_one(struct ib_device *device, void *client_data) list_for_each_entry_safe(priv, tmp, dev_list, list) { ipoib_parent_unregister_pre(priv->dev); - /* Wrap rtnl_lock/unlock with mutex to protect sysfs calls */ - mutex_lock(&priv->sysfs_mutex); unregister_netdev(priv->dev); - mutex_unlock(&priv->sysfs_mutex); } kfree(dev_list); @@ -2527,8 +2523,7 @@ static int __init ipoib_init_module(void) * its private workqueue, and we only queue up flush events * on our global flush workqueue. This avoids the deadlocks. */ - ipoib_workqueue = alloc_ordered_workqueue("ipoib_flush", - WQ_MEM_RECLAIM); + ipoib_workqueue = alloc_ordered_workqueue("ipoib_flush", 0); if (!ipoib_workqueue) { ret = -ENOMEM; goto err_fs; |