[PATCH 5/9] IB/srp: Introduce srp_finish_mapping()

[Bart Van Assche <bvanassche-HInyCGIudOg@public.gmane.org>]

This patch does not change any functionality.

Signed-off-by: Bart Van Assche <bvanassche-HInyCGIudOg@public.gmane.org>
Cc: Roland Dreier <roland-BHEL68pLQRGGvPXPguhicg@public.gmane.org>
Cc: David Dillow <dave-i1Mk8JYDVaaSihdK6806/g@public.gmane.org>
Cc: Sagi Grimberg <sagig-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Cc: Vu Pham <vu-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Cc: Sebastian Parschauer <sebastian.riemer-EIkl63zCoXaH+58JC4qpiA@public.gmane.org>
---
 drivers/infiniband/ulp/srp/ib_srp.c | 37 +++++++++++++++++++++++++------------
 1 file changed, 25 insertions(+), 12 deletions(-)

diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index 5fb607b..ba434d6 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -935,16 +935,6 @@ static int srp_map_finish_fmr(struct srp_map_state *state,
 	struct ib_pool_fmr *fmr;
 	u64 io_addr = 0;
 
-	if (!state->npages)
-		return 0;
-
-	if (state->npages == 1) {
-		srp_map_desc(state, state->base_dma_addr, state->fmr_len,
-			     target->rkey);
-		state->npages = state->fmr_len = 0;
-		return 0;
-	}
-
 	fmr = ib_fmr_pool_map_phys(dev->fmr_pool, state->pages,
 				   state->npages, io_addr);
 	if (IS_ERR(fmr))
@@ -954,10 +944,33 @@ static int srp_map_finish_fmr(struct srp_map_state *state,
 	state->nfmr++;
 
 	srp_map_desc(state, 0, state->fmr_len, fmr->fmr->rkey);
-	state->npages = state->fmr_len = 0;
+
 	return 0;
 }
 
+static int srp_finish_mapping(struct srp_map_state *state,
+			      struct srp_target_port *target)
+{
+	int ret = 0;
+
+	if (state->npages == 0)
+		return 0;
+
+	if (state->npages == 1) {
+		srp_map_desc(state, state->base_dma_addr, state->fmr_len,
+			     target->rkey);
+	} else {
+		ret = srp_map_finish_fmr(state, target);
+	}
+
+	if (ret == 0) {
+		state->npages = 0;
+		state->fmr_len = 0;
+	}
+
+	return ret;
+}
+
 static void srp_map_update_start(struct srp_map_state *state,
 				 struct scatterlist *sg, int sg_index,
 				 dma_addr_t dma_addr)
@@ -998,7 +1011,7 @@ static int srp_map_sg_entry(struct srp_map_state *state,
 	 * avoided using FMR on such page fragments.
 	 */
 	if (dma_addr & ~dev->fmr_page_mask || dma_len > dev->fmr_max_size) {
-		ret = srp_map_finish_fmr(state, target);
+		ret = srp_finish_mapping(state, target);
 		if (ret)
 			return ret;
 
-- 
1.8.4.5

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