pvcalls-back: set -ENOTCONN in pvcalls_conn_back_read
authorStefano Stabellini <sstabellini@kernel.org>
Fri, 21 Dec 2018 23:06:33 +0000 (15:06 -0800)
committerBoris Ostrovsky <boris.ostrovsky@oracle.com>
Wed, 2 Jan 2019 16:00:38 +0000 (11:00 -0500)
commite6587cdbd732eacb4c7ce592ed46f7bbcefb655f
tree936d4b9222a32d2ee49c6f183124b1bffb6bcdae
parentd90a1ca60a1eccb4383fe203c76223ab4c0799ed
pvcalls-back: set -ENOTCONN in pvcalls_conn_back_read

When a connection is closing we receive on pvcalls_sk_state_change
notification. Instead of setting the connection as closed immediately
(-ENOTCONN), let's read one more time from it: pvcalls_conn_back_read
will set the connection as closed when necessary.

That way, we avoid races between pvcalls_sk_state_change and
pvcalls_back_ioworker.

Signed-off-by: Stefano Stabellini <stefanos@xilinx.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
drivers/xen/pvcalls-back.c