RDMA/core: add port state cache

We need a port state cache in ib_core, later we will use in rdma_cm.

Signed-off-by: Jack Wang <jinpu.wang@profitbricks.com>
Reviewed-by: Michael Wang <yun.wang@profitbricks.com>
Acked-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

1 files changed, 9 insertions, 1 deletions

diff --git a/drivers/infiniband/core/cache.c b/drivers/infiniband/core/cache.c
index ae04826e82fc..87fd7c39fbc0 100644
--- a/drivers/infiniband/core/cache.c
+++ b/drivers/infiniband/core/cache.c
@@ -1105,6 +1105,8 @@ static void ib_cache_update(struct ib_device *device,
         }
 
         device->cache.lmc_cache[port - rdma_start_port(device)] = tprops->lmc;
+        device->cache.port_state_cache[port - rdma_start_port(device)] =
+                tprops->state;
 
         write_unlock_irq(&device->cache.lock);
 
@@ -1164,7 +1166,11 @@ int ib_cache_setup_one(struct ib_device *device)
                                           (rdma_end_port(device) -
                                            rdma_start_port(device) + 1),
                                           GFP_KERNEL);
-        if (!device->cache.pkey_cache ||
+        device->cache.port_state_cache = kmalloc(sizeof *device->cache.port_state_cache *
+                                          (rdma_end_port(device) -
+                                           rdma_start_port(device) + 1),
+                                          GFP_KERNEL);
+        if (!device->cache.pkey_cache || !device->cache.port_state_cache ||
             !device->cache.lmc_cache) {
                 err = -ENOMEM;
                 goto free;
@@ -1190,6 +1196,7 @@ err:
 free:
         kfree(device->cache.pkey_cache);
         kfree(device->cache.lmc_cache);
+        kfree(device->cache.port_state_cache);
         return err;
 }
 
@@ -1211,6 +1218,7 @@ void ib_cache_release_one(struct ib_device *device)
         gid_table_release_one(device);
         kfree(device->cache.pkey_cache);
         kfree(device->cache.lmc_cache);
+        kfree(device->cache.port_state_cache);
 }
 
 void ib_cache_cleanup_one(struct ib_device *device)