tree 81fcc683f41936597e62cdba254b89ab569e5526
parent 8ddc7c5326064434048ec1ecfe57659e08345cc1
author Jack Morgenstein <jackm@mellanox.co.il> 1154627802 -0700
committer Roland Dreier <rolandd@cisco.com> 1154627802 -0700

IB/uverbs: Avoid a crash on device hot remove

Wait until all users have closed their device context before allowing
device unregistration to complete.  This prevents a crash caused by
referring to stale data structures.

A better solution would be to have a way to revoke contexts rather
than waiting for userspace to close the context, but that's a much
bigger change that will have to wait.  For now let's at least avoid
the crash.

Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il>
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>