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 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
iw_cxgb4-only-validate-the-msn-for-successful-completions.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f55688c45442bc863f40ad678c638785b26cdce6 Mon Sep 17 00:00:00 2001
From: Steve Wise <swise@xxxxxxxxxxxxxxxxxxxxx>
Date: Mon, 18 Dec 2017 13:10:00 -0800
Subject: iw_cxgb4: Only validate the MSN for successful completions
From: Steve Wise <swise@xxxxxxxxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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
@@ -579,10 +579,10 @@ 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@xxxxxxxxxxxxxxxxxxxxx are
queue-4.4/iw_cxgb4-only-validate-the-msn-for-successful-completions.patch