svcrdma: Move destroy to kernel thread
Some providers may wait while destroying adapter resources.
Since it is possible that the last reference is put on the
dto_tasklet, the actual destroy must be scheduled as a work item.
Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c
index 78303f0..028c6cf 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_transport.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c
@@ -963,12 +963,15 @@
rdma_destroy_id(rdma->sc_cm_id);
}
-static void svc_rdma_free(struct svc_xprt *xprt)
+static void __svc_rdma_free(struct work_struct *work)
{
- struct svcxprt_rdma *rdma = (struct svcxprt_rdma *)xprt;
+ struct svcxprt_rdma *rdma =
+ container_of(work, struct svcxprt_rdma, sc_work);
dprintk("svcrdma: svc_rdma_free(%p)\n", rdma);
+
/* We should only be called from kref_put */
- BUG_ON(atomic_read(&xprt->xpt_ref.refcount) != 0);
+ BUG_ON(atomic_read(&rdma->sc_xprt.xpt_ref.refcount) != 0);
+
if (rdma->sc_sq_cq && !IS_ERR(rdma->sc_sq_cq))
ib_destroy_cq(rdma->sc_sq_cq);
@@ -985,6 +988,14 @@
kfree(rdma);
}
+static void svc_rdma_free(struct svc_xprt *xprt)
+{
+ struct svcxprt_rdma *rdma =
+ container_of(xprt, struct svcxprt_rdma, sc_xprt);
+ INIT_WORK(&rdma->sc_work, __svc_rdma_free);
+ schedule_work(&rdma->sc_work);
+}
+
static int svc_rdma_has_wspace(struct svc_xprt *xprt)
{
struct svcxprt_rdma *rdma =