RDMA/nes: Async event for closed QP causes crash

Under abnormal termination, modify_qp() closes the QP, and async event
(AE) handling also attempts to close the same QP, causing a crash.
Fix this by checking the state of the QP before processing the AE.

Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/nes/nes_hw.c b/drivers/infiniband/hw/nes/nes_hw.c
index 86acb7d57064..bb9c77504fe2 100644
--- a/drivers/infiniband/hw/nes/nes_hw.c
+++ b/drivers/infiniband/hw/nes/nes_hw.c
@@ -3422,6 +3422,7 @@ static void nes_process_iwarp_aeqe(struct nes_device *nesdev,
         struct nes_adapter *nesadapter = nesdev->nesadapter;
         u32 aeq_info;
         u32 next_iwarp_state = 0;
+        u32 aeqe_cq_id;
         u16 async_event_id;
         u8 tcp_state;
         u8 iwarp_state;
@@ -3449,6 +3450,14 @@ static void nes_process_iwarp_aeqe(struct nes_device *nesdev,
                         le32_to_cpu(aeqe->aeqe_words[NES_AEQE_COMP_QP_CQ_ID_IDX]), aeqe,
                         nes_tcp_state_str[tcp_state], nes_iwarp_state_str[iwarp_state]);
 
+        aeqe_cq_id = le32_to_cpu(aeqe->aeqe_words[NES_AEQE_COMP_QP_CQ_ID_IDX]);
+        if (aeq_info & NES_AEQE_QP) {
+                if ((!nes_is_resource_allocated(nesadapter, nesadapter->allocated_qps,
+                                aeqe_cq_id)) ||
+                                (atomic_read(&nesqp->close_timer_started)))
+                        return;
+        }
+
         switch (async_event_id) {
                 case NES_AEQE_AEID_LLP_FIN_RECEIVED:
                         if (nesqp->term_flags)