This is a note to let you know that I've just added the patch titled

iw_cxgb4: Only validate the MSN for successful completions

to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: iw_cxgb4-only-validate-the-msn-for-successful-completions.patch and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From f55688c45442bc863f40ad678c638785b26cdce6 Mon Sep 17 00:00:00 2001

From: Steve Wise swise@opengridcomputing.com Date: Mon, 18 Dec 2017 13:10:00 -0800 Subject: iw_cxgb4: Only validate the MSN for successful completions

From: Steve Wise swise@opengridcomputing.com

commit f55688c45442bc863f40ad678c638785b26cdce6 upstream.

If the RECV CQE is in error, ignore the MSN check. This was causing recvs that were flushed into the sw cq to be completed with the wrong status (BAD_MSN instead of FLUSHED).

Signed-off-by: Steve Wise swise@opengridcomputing.com Signed-off-by: Jason Gunthorpe jgg@mellanox.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/infiniband/hw/cxgb4/cq.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/infiniband/hw/cxgb4/cq.c +++ b/drivers/infiniband/hw/cxgb4/cq.c @@ -575,10 +575,10 @@ static int poll_cq(struct t4_wq *wq, str ret = -EAGAIN; goto skip_cqe; } - if (unlikely((CQE_WRID_MSN(hw_cqe) != (wq->rq.msn)))) { + if (unlikely(!CQE_STATUS(hw_cqe) && + CQE_WRID_MSN(hw_cqe) != wq->rq.msn)) { t4_set_wq_in_error(wq); - hw_cqe->header |= htonl(CQE_STATUS_V(T4_ERR_MSN)); - goto proc_cqe; + hw_cqe->header |= cpu_to_be32(CQE_STATUS_V(T4_ERR_MSN)); } goto proc_cqe; }

Patches currently in stable-queue which might be from swise@opengridcomputing.com are

queue-4.9/iw_cxgb4-only-validate-the-msn-for-successful-completions.patch