RDMA/nes: Clear stall bit before destroying NIC QP
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.tung@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
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 @@
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 @@
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);
}
/**