Re: [PATCH v2 2/2] RDMA/rxe: Generate error completion for error requester state

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 





On 5/11/22 10:30 AM, Li Zhijian wrote:
SoftRoCE always returns success when user space is posting a new wqe where
it usually just enqueues a wqe.

Once the requester state becomes QP_STATE_ERROR, we should generate error
completion for all subsequent wqe. So the user is able to poll the
completion event to check if the former wqe is handled correctly.

Here we check QP_STATE_ERROR after req_next_wqe() so that the completion
can associate with its wqe.

Signed-off-by: Li Zhijian <lizhijian@xxxxxxxxxxx>
---
  drivers/infiniband/sw/rxe/rxe_req.c | 10 +++++++++-
  1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/sw/rxe/rxe_req.c b/drivers/infiniband/sw/rxe/rxe_req.c
index 8bdd0b6b578f..ed6a486c4343 100644
--- a/drivers/infiniband/sw/rxe/rxe_req.c
+++ b/drivers/infiniband/sw/rxe/rxe_req.c
@@ -624,7 +624,7 @@ int rxe_requester(void *arg)
  	rxe_get(qp);
next_wqe:
-	if (unlikely(!qp->valid || qp->req.state == QP_STATE_ERROR))
+	if (unlikely(!qp->valid))
  		goto exit;
if (unlikely(qp->req.state == QP_STATE_RESET)) {
@@ -646,6 +646,14 @@ int rxe_requester(void *arg)
  	if (unlikely(!wqe))
  		goto exit;
+ if (qp->req.state == QP_STATE_ERROR) {
+		/*
+		 * Generate an error completion so that user space is able to
+		 * poll this completion.
+		 */
+		goto err;
+	}
+

Should this still use unlikely(...) ? Because the original judgement has
a unlikely surrounded.

Cheng Xu

  	if (wqe->mask & WR_LOCAL_OP_MASK) {
  		ret = rxe_do_local_ops(qp, wqe);
  		if (unlikely(ret))



[Index of Archives]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Photo]     [Yosemite News]     [Yosemite Photos]     [Linux Kernel]     [Linux SCSI]     [XFree86]

  Powered by Linux