Clear the stall bit to drop any incoming packets while destroying
nic qp. This will prevent a chip resource leak.
Signed-off-by: Chien Tung <chien.tin.t...@intel.com>
---
drivers/infiniband/hw/nes/nes_hw.c | 8 ++++++++
drivers/infiniband/hw/nes/nes_hw.h | 1 +
2 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 ce7f538..9250755 100644
--- a/drivers/infiniband/hw/nes/nes_hw.c
+++ b/drivers/infiniband/hw/nes/nes_hw.c
@@ -1899,9 +1899,14 @@ void nes_destroy_nic_qp(struct nes_vnic *nesvnic)
u16 wqe_fragment_index;
u64 wqe_frag;
u32 cqp_head;
+ u32 wqm_cfg0;
unsigned long flags;
int ret;
+ /* clear wqe stall before destroying NIC QP */
+ wqm_cfg0 = nes_read_indexed(nesdev, NES_IDX_WQM_CONFIG0);
+ nes_write_indexed(nesdev, NES_IDX_WQM_CONFIG0, wqm_cfg0 & 0xFFFF7FFF);
+
/* Free remaining NIC receive buffers */
while (nesvnic->nic.rq_head != nesvnic->nic.rq_tail) {
nic_rqe = &nesvnic->nic.rq_vbase[nesvnic->nic.rq_tail];
@@ -2020,6 +2025,9 @@ void nes_destroy_nic_qp(struct nes_vnic *nesvnic)
pci_free_consistent(nesdev->pcidev, nesvnic->nic_mem_size,
nesvnic->nic_vbase,
nesvnic->nic_pbase);
+
+ /* restore old wqm_cfg0 value */
+ nes_write_indexed(nesdev, NES_IDX_WQM_CONFIG0, wqm_cfg0);
}
/**
diff --git a/drivers/infiniband/hw/nes/nes_hw.h
b/drivers/infiniband/hw/nes/nes_hw.h
index 9b1e7f8..bbbfe9f 100644
--- a/drivers/infiniband/hw/nes/nes_hw.h
+++ b/drivers/infiniband/hw/nes/nes_hw.h
@@ -160,6 +160,7 @@ enum indexed_regs {
NES_IDX_ENDNODE0_NSTAT_TX_OCTETS_HI = 0x7004,
NES_IDX_ENDNODE0_NSTAT_TX_FRAMES_LO = 0x7008,
NES_IDX_ENDNODE0_NSTAT_TX_FRAMES_HI = 0x700c,
+ NES_IDX_WQM_CONFIG0 = 0x5000,
NES_IDX_WQM_CONFIG1 = 0x5004,
NES_IDX_CM_CONFIG = 0x5100,
NES_IDX_NIC_LOGPORT_TO_PHYPORT = 0x6000,
--
1.6.4.2
--
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