Clean up: Code review suggested that a common bit of code can be
placed into a helper function, and this gives us fewer places to
stick an "I DMA unmapped something" trace point.
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
net/sunrpc/xprtrdma/fmr_ops.c | 19 ++++++++-----------
net/sunrpc/xprtrdma/frwr_ops.c | 10 ++--------
net/sunrpc/xprtrdma/verbs.c | 26 ++++++++++++++++++++++----
net/sunrpc/xprtrdma/xprt_rdma.h | 1 +
4 files changed, 33 insertions(+), 23 deletions(-)
diff --git a/net/sunrpc/xprtrdma/fmr_ops.c b/net/sunrpc/xprtrdma/fmr_ops.c
index 8bd0399..7f2f2b7 100644
--- a/net/sunrpc/xprtrdma/fmr_ops.c
+++ b/net/sunrpc/xprtrdma/fmr_ops.c
@@ -135,14 +135,12 @@ enum {
/* ORDER: invalidate first */
rc = __fmr_unmap(mr);
-
- /* ORDER: then DMA unmap */
- ib_dma_unmap_sg(r_xprt->rx_ia.ri_device,
- mr->mr_sg, mr->mr_nents, mr->mr_dir);
if (rc)
goto out_release;
- rpcrdma_mr_put(mr);
+ /* ORDER: then DMA unmap */
+ rpcrdma_mr_unmap_and_put(mr);
+
r_xprt->rx_stats.mrs_recovered++;
return;
@@ -150,6 +148,9 @@ enum {
pr_err("rpcrdma: FMR reset failed (%d), %p released\n", rc, mr);
r_xprt->rx_stats.mrs_orphaned++;
+ ib_dma_unmap_sg(r_xprt->rx_ia.ri_device,
+ mr->mr_sg, mr->mr_nents, mr->mr_dir);
+
spin_lock(&r_xprt->rx_buf.rb_mrlock);
list_del(&mr->mr_all);
spin_unlock(&r_xprt->rx_buf.rb_mrlock);
@@ -245,9 +246,7 @@ enum {
pr_err("rpcrdma: ib_map_phys_fmr %u@0x%llx+%i (%d) status %i\n",
len, (unsigned long long)dma_pages[0],
pageoff, mr->mr_nents, rc);
- ib_dma_unmap_sg(r_xprt->rx_ia.ri_device,
- mr->mr_sg, mr->mr_nents, mr->mr_dir);
- rpcrdma_mr_put(mr);
+ rpcrdma_mr_unmap_and_put(mr);
return ERR_PTR(-EIO);
}
@@ -289,9 +288,7 @@ enum {
dprintk("RPC: %s: DMA unmapping fmr %p\n",
__func__, &mr->fmr);
list_del(&mr->fmr.fm_mr->list);
- ib_dma_unmap_sg(r_xprt->rx_ia.ri_device,
- mr->mr_sg, mr->mr_nents, mr->mr_dir);
- rpcrdma_mr_put(mr);
+ rpcrdma_mr_unmap_and_put(mr);
}
return;
diff --git a/net/sunrpc/xprtrdma/frwr_ops.c b/net/sunrpc/xprtrdma/frwr_ops.c
index 8ba4b33..35e3a54 100644
--- a/net/sunrpc/xprtrdma/frwr_ops.c
+++ b/net/sunrpc/xprtrdma/frwr_ops.c
@@ -459,13 +459,9 @@
list_for_each_entry(mr, mrs, mr_list)
if (mr->mr_handle == rep->rr_inv_rkey) {
- struct rpcrdma_xprt *r_xprt = mr->mr_xprt;
-
list_del(&mr->mr_list);
mr->frwr.fr_state = FRWR_IS_INVALID;
- ib_dma_unmap_sg(r_xprt->rx_ia.ri_device,
- mr->mr_sg, mr->mr_nents, mr->mr_dir);
- rpcrdma_mr_put(mr);
+ rpcrdma_mr_unmap_and_put(mr);
break; /* only one invalidated MR per RPC */
}
}
@@ -545,9 +541,7 @@
mr = rpcrdma_mr_pop(mrs);
dprintk("RPC: %s: DMA unmapping frwr %p\n",
__func__, &mr->frwr);
- ib_dma_unmap_sg(ia->ri_device,
- mr->mr_sg, mr->mr_nents, mr->mr_dir);
- rpcrdma_mr_put(mr);
+ rpcrdma_mr_unmap_and_put(mr);
}
return;
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index 2582729..9cc8abc 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -1321,6 +1321,14 @@ struct rpcrdma_mr *
return NULL;
}
+static void
+__rpcrdma_mr_put(struct rpcrdma_buffer *buf, struct rpcrdma_mr *mr)
+{
+ spin_lock(&buf->rb_mrlock);
+ rpcrdma_mr_push(mr, &buf->rb_mrs);
+ spin_unlock(&buf->rb_mrlock);
+}
+
/**
* rpcrdma_mr_put - Release an rpcrdma_mr object
* @mr: object to release
@@ -1329,12 +1337,22 @@ struct rpcrdma_mr *
void
rpcrdma_mr_put(struct rpcrdma_mr *mr)
{
+ __rpcrdma_mr_put(&mr->mr_xprt->rx_buf, mr);
+}
+
+/**
+ * rpcrdma_mr_unmap_and_put - DMA unmap an MR and release it
+ * @mr: object to release
+ *
+ */
+void
+rpcrdma_mr_unmap_and_put(struct rpcrdma_mr *mr)
+{
struct rpcrdma_xprt *r_xprt = mr->mr_xprt;
- struct rpcrdma_buffer *buf = &r_xprt->rx_buf;
- spin_lock(&buf->rb_mrlock);
- rpcrdma_mr_push(mr, &buf->rb_mrs);
- spin_unlock(&buf->rb_mrlock);
+ ib_dma_unmap_sg(r_xprt->rx_ia.ri_device,
+ mr->mr_sg, mr->mr_nents, mr->mr_dir);
+ __rpcrdma_mr_put(&r_xprt->rx_buf, mr);
}
static struct rpcrdma_rep *
diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h
index 530ace6..28ae1fb 100644
--- a/net/sunrpc/xprtrdma/xprt_rdma.h
+++ b/net/sunrpc/xprtrdma/xprt_rdma.h
@@ -576,6 +576,7 @@ int rpcrdma_ep_post(struct rpcrdma_ia *, struct rpcrdma_ep *,
struct rpcrdma_mr *rpcrdma_mr_get(struct rpcrdma_xprt *r_xprt);
void rpcrdma_mr_put(struct rpcrdma_mr *mr);
+void rpcrdma_mr_unmap_and_put(struct rpcrdma_mr *mr);
void rpcrdma_mr_defer_recovery(struct rpcrdma_mr *mr);
struct rpcrdma_req *rpcrdma_buffer_get(struct rpcrdma_buffer *);
--
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