diff options
| author |   Jason Gunthorpe <jgg@mellanox.com> | 2018-07-25 21:40:16 -0600 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2018-08-01 14:55:48 -0600 |
| commit | cc2e14e68004e6dec70842f990085f67c1f6fec7 (patch) | |
| tree | dede1f553f6725ab52071442f422fd36a170acf9 /drivers/infiniband/core | |
| parent | IB/uverbs: Allow uobject allocation to work concurrently with disassociate (diff) | |
| download | linux-dev-cc2e14e68004e6dec70842f990085f67c1f6fec7.tar.xz linux-dev-cc2e14e68004e6dec70842f990085f67c1f6fec7.zip | |
IB/uverbs: Lower the test for ongoing disassociation
Commands that are reading/writing to objects can test for an ongoing
disassociation during their initial call to rdma_lookup_get_uobject. This
directly prevents all of these commands from conflicting with an ongoing
disassociation.
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/core')
| -rw-r--r-- | drivers/infiniband/core/rdma_core.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/infiniband/core/rdma_core.c b/drivers/infiniband/core/rdma_core.c index 95a8110f186f..d4de1fed98f2 100644 --- a/drivers/infiniband/core/rdma_core.c +++ b/drivers/infiniband/core/rdma_core.c @@ -449,6 +449,17 @@ struct ib_uobject *rdma_lookup_get_uobject(const struct uverbs_obj_type *type, goto free; } + /* + * If we have been disassociated block every command except for + * DESTROY based commands. + */ + if (mode != UVERBS_LOOKUP_DESTROY && + !srcu_dereference(ufile->device->ib_dev, + &ufile->device->disassociate_srcu)) { + ret = -EIO; + goto free; + } + ret = uverbs_try_lock_object(uobj, mode); if (ret) goto free; |