linux/drivers/infiniband
Andrew Boyer dd753d8743 IB/rxe: Advance the consumer pointer before posting the CQE
A simple userspace application might poll the CQ, find a completion,
and then attempt to post a new WQE to the SQ. A spurious error can
occur if the userspace application detects a full SQ in the instant
before the kernel is able to advance the SQ consumer pointer.

This is noticeable when using single-entry SQs with ibv_rc_pingpong
if lots of kernel and userspace library debugging is enabled.

Signed-off-by: Andrew Boyer <andrew.boyer@dell.com>
Reviewed-by: Yonatan Cohen <yonatanc@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-12-12 16:31:45 -05:00
..
core mm: replace get_user_pages_remote() write/force parameters with gup_flags 2016-10-19 08:12:02 -07:00
hw net/mlx5: Add multi dest support 2016-10-30 15:43:17 +02:00
sw IB/rxe: Advance the consumer pointer before posting the CQE 2016-12-12 16:31:45 -05:00
ulp Merge of primary rdma-core code for 4.9 2016-10-09 17:04:33 -07:00
Kconfig qedr: Add RoCE driver framework 2016-10-14 15:00:10 -04:00
Makefile IB/rdmavt: Create module framework and handle driver registration 2016-03-10 20:37:04 -05:00