[PATCH for-rc] RDMA/bnxt_re: Do not add user qps to flushlist

[PATCH for-rc] RDMA/bnxt_re: Do not add user qps to flushlist

[Selvin Xavier]

Driver shall add only the kernel qps to the flush list for clean up.
During async error events from the HW, driver is adding qps to this
list without checking if the qp is kernel qp or not.

Add a check to avoid user qp addition to the flush list.

Fixes: 942c9b6ca8de ("RDMA/bnxt_re: Avoid Hard lockup during error CQE processing")
Fixes: c50866e2853a ("bnxt_re: fix the regression due to changes in alloc_pbl")
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
---
 drivers/infiniband/hw/bnxt_re/main.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/bnxt_re/main.c b/drivers/infiniband/hw/bnxt_re/main.c
index dad0df8..17ac8b7 100644
--- a/drivers/infiniband/hw/bnxt_re/main.c
+++ b/drivers/infiniband/hw/bnxt_re/main.c
@@ -821,7 +821,8 @@ static int bnxt_re_handle_qp_async_event(struct creq_qp_event *qp_event,
 	struct ib_event event;
 	unsigned int flags;
 
-	if (qp->qplib_qp.state == CMDQ_MODIFY_QP_NEW_STATE_ERR) {
+	if (qp->qplib_qp.state == CMDQ_MODIFY_QP_NEW_STATE_ERR &&
+	    rdma_is_kernel_res(&qp->ib_qp.res)) {
 		flags = bnxt_re_lock_cqs(qp);
 		bnxt_qplib_add_flush_qp(&qp->qplib_qp);
 		bnxt_re_unlock_cqs(qp, flags);
-- 
2.5.5

Re: [PATCH for-rc] RDMA/bnxt_re: Do not add user qps to flushlist

[Jason Gunthorpe]

On Wed, Aug 05, 2020 at 09:45:48PM -0700, Selvin Xavier wrote:
> Driver shall add only the kernel qps to the flush list for clean up.
> During async error events from the HW, driver is adding qps to this
> list without checking if the qp is kernel qp or not.
> 
> Add a check to avoid user qp addition to the flush list.
> 
> Fixes: 942c9b6ca8de ("RDMA/bnxt_re: Avoid Hard lockup during error CQE processing")
> Fixes: c50866e2853a ("bnxt_re: fix the regression due to changes in alloc_pbl")
> Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
> ---
>  drivers/infiniband/hw/bnxt_re/main.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)

Applied to for-rc, thanks

Jason