caif: Add reference counting to service layer
Changes:
o Added functions cfsrvl_get and cfsrvl_put.
o Added support release_client to use by socket and net device.
o Increase reference counting for in-flight packets from cfmuxl
Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/caif/cfmuxl.c b/net/caif/cfmuxl.c
index 6fb9f9e..7372f27 100644
--- a/net/caif/cfmuxl.c
+++ b/net/caif/cfmuxl.c
@@ -62,6 +62,7 @@
{
struct cfmuxl *muxl = container_obj(layr);
spin_lock(&muxl->receive_lock);
+ cfsrvl_get(up);
list_add(&up->node, &muxl->srvl_list);
spin_unlock(&muxl->receive_lock);
return 0;
@@ -172,8 +173,11 @@
struct cfmuxl *muxl = container_obj(layr);
spin_lock(&muxl->receive_lock);
up = get_up(muxl, id);
+ if (up == NULL)
+ return NULL;
memset(muxl->up_cache, 0, sizeof(muxl->up_cache));
list_del(&up->node);
+ cfsrvl_put(up);
spin_unlock(&muxl->receive_lock);
return up;
}
@@ -203,8 +207,9 @@
*/
return /* CFGLU_EPROT; */ 0;
}
-
+ cfsrvl_get(up);
ret = up->receive(up, pkt);
+ cfsrvl_put(up);
return ret;
}