From: Jorgen Hansen <jhan...@vmware.com> Date: Fri, 24 Nov 2017 06:25:28 -0800
> When using the host personality, VMCI will grab a mutex for any > queue pair access. In the detach callback for the vmci vsock > transport, we call vsock_stream_has_data while holding a spinlock, > and vsock_stream_has_data will access a queue pair. > > To avoid this, we can simply omit calling vsock_stream_has_data > for host side queue pairs, since the QPs are empty per default > when the guest has detached. > > This bug affects users of VMware Workstation using kernel version > 4.4 and later. > > Testing: Ran vsock tests between guest and host, and verified that > with this change, the host isn't calling vsock_stream_has_data > during detach. Ran mixedTest between guest and host using both > guest and host as server. > > v2: Rebased on top of recent change to sk_state values > Reviewed-by: Adit Ranadive <ad...@vmware.com> > Reviewed-by: Aditya Sarwade <asarw...@vmware.com> > Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com> > Signed-off-by: Jorgen Hansen <jhan...@vmware.com> Applied, thank you.
