On Mon, Nov 27, 2017 at 01:16:32PM -0800, Steve Wise wrote:
> Only insert our special drain CQEs to support ib_drain_sq/rq() after
> the wq is flushed. Otherwise, existing but not yet polled CQEs can be
> returned out of order to the user application. This can happen when the
> QP has exited RTS but not yet flushed the QP, which can happen during
> a normal close (vs abortive close).
>
> In addition never count the drain CQEs when determining how many CQEs
> need to be synthesized during the flush operation. This latter issue
> should never happen if the QP is properly flushed before inserting the
> drain CQE, but I wanted to avoid corrupting the CQ state. So we handle
> it and log a warning once.
>
> Fixes: 4fe7c2962e11 ("iw_cxgb4: refactor sq/rq drain logic")
> Signed-off-by: Steve Wise <swise@xxxxxxxxxxxxxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
> drivers/infiniband/hw/cxgb4/cq.c | 5 +++++
> drivers/infiniband/hw/cxgb4/qp.c | 14 ++++++++++++--
> 2 files changed, 17 insertions(+), 2 deletions(-)
Thanks applied to -rc
Jason
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