diff options
| author | Michael S. Tsirkin <mst@redhat.com> | 2011-11-27 19:05:58 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2012-02-28 09:13:22 +0200 |
| commit | ea5d404655ba3b356d0c06d6a3c4f24112124522 (patch) | |
| tree | 092a40fd222d3565ca4b5188c85dba65c1305583 /drivers/vhost | |
| parent | d550dda192c1bd039afb774b99485e88b70d7cb8 (diff) | |
| download | lwn-ea5d404655ba3b356d0c06d6a3c4f24112124522.tar.gz lwn-ea5d404655ba3b356d0c06d6a3c4f24112124522.zip | |
vhost: fix release path lockdep checks
We shouldn't hold any locks on release path. Pass a flag to
vhost_dev_cleanup to use the lockdep info correctly.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Sasha Levin <levinsasha928@gmail.com>
Diffstat (limited to 'drivers/vhost')
| -rw-r--r-- | drivers/vhost/net.c | 2 | ||||
| -rw-r--r-- | drivers/vhost/vhost.c | 9 | ||||
| -rw-r--r-- | drivers/vhost/vhost.h | 2 |
3 files changed, 7 insertions, 6 deletions
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index 9dab1f51dd43..f0da2c32fbde 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -588,7 +588,7 @@ static int vhost_net_release(struct inode *inode, struct file *f) vhost_net_stop(n, &tx_sock, &rx_sock); vhost_net_flush(n); - vhost_dev_cleanup(&n->dev); + vhost_dev_cleanup(&n->dev, false); if (tx_sock) fput(tx_sock->file); if (rx_sock) diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index ae66278e4dcf..385d8ee0d2d1 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -405,7 +405,7 @@ long vhost_dev_reset_owner(struct vhost_dev *dev) if (!memory) return -ENOMEM; - vhost_dev_cleanup(dev); + vhost_dev_cleanup(dev, true); memory->nregions = 0; RCU_INIT_POINTER(dev->memory, memory); @@ -436,8 +436,8 @@ int vhost_zerocopy_signal_used(struct vhost_virtqueue *vq) return j; } -/* Caller should have device mutex */ -void vhost_dev_cleanup(struct vhost_dev *dev) +/* Caller should have device mutex if and only if locked is set */ +void vhost_dev_cleanup(struct vhost_dev *dev, bool locked) { int i; @@ -474,7 +474,8 @@ void vhost_dev_cleanup(struct vhost_dev *dev) dev->log_file = NULL; /* No one will access memory at this point */ kfree(rcu_dereference_protected(dev->memory, - lockdep_is_held(&dev->mutex))); + locked == + lockdep_is_held(&dev->mutex))); RCU_INIT_POINTER(dev->memory, NULL); WARN_ON(!list_empty(&dev->work_list)); if (dev->worker) { diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h index a801e2821d03..8dcf4cca6bf2 100644 --- a/drivers/vhost/vhost.h +++ b/drivers/vhost/vhost.h @@ -163,7 +163,7 @@ struct vhost_dev { long vhost_dev_init(struct vhost_dev *, struct vhost_virtqueue *vqs, int nvqs); long vhost_dev_check_owner(struct vhost_dev *); long vhost_dev_reset_owner(struct vhost_dev *); -void vhost_dev_cleanup(struct vhost_dev *); +void vhost_dev_cleanup(struct vhost_dev *, bool locked); long vhost_dev_ioctl(struct vhost_dev *, unsigned int ioctl, unsigned long arg); int vhost_vq_access_ok(struct vhost_virtqueue *vq); int vhost_log_access_ok(struct vhost_dev *); |