Move the srp_map_desc() call from inside srp_map_sg_entry() to
srp_map_sg() such that the use_mr argument can be removed from
srp_map_sg_entry().
Signed-off-by: Bart Van Assche <bart.vanassche@xxxxxxxxxxx>
---
drivers/infiniband/ulp/srp/ib_srp.c | 36 +++++++++++++++---------------------
1 file changed, 15 insertions(+), 21 deletions(-)
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index 660a4a4..b8fc35b 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -1260,6 +1260,8 @@ static void srp_map_desc(struct srp_map_state *state, dma_addr_t dma_addr,
{
struct srp_direct_buf *desc = state->desc;
+ WARN_ON_ONCE(!dma_len);
+
desc->va = cpu_to_be64(dma_addr);
desc->key = cpu_to_be32(rkey);
desc->len = cpu_to_be32(dma_len);
@@ -1366,29 +1368,17 @@ static int srp_finish_mapping(struct srp_map_state *state,
static int srp_map_sg_entry(struct srp_map_state *state,
struct srp_rdma_ch *ch,
- struct scatterlist *sg, int sg_index,
- bool use_mr)
+ struct scatterlist *sg, int sg_index)
{
struct srp_target_port *target = ch->target;
struct srp_device *dev = target->srp_host->srp_dev;
struct ib_device *ibdev = dev->dev;
dma_addr_t dma_addr = ib_sg_dma_address(ibdev, sg);
unsigned int dma_len = ib_sg_dma_len(ibdev, sg);
- unsigned int len;
+ unsigned int len = 0;
int ret;
- if (!dma_len)
- return 0;
-
- if (!use_mr) {
- /*
- * Once we're in direct map mode for a request, we don't
- * go back to FMR or FR mode, so no need to update anything
- * other than the descriptor.
- */
- srp_map_desc(state, dma_addr, dma_len, target->rkey);
- return 0;
- }
+ WARN_ON_ONCE(!dma_len);
while (dma_len) {
unsigned offset = dma_addr & ~dev->mr_page_mask;
@@ -1441,16 +1431,20 @@ static int srp_map_sg(struct srp_map_state *state, struct srp_rdma_ch *ch,
use_mr = !!ch->fmr_pool;
}
- for_each_sg(scat, sg, count, i) {
- ret = srp_map_sg_entry(state, ch, sg, i, use_mr);
- if (ret)
- goto out;
- }
-
if (use_mr) {
+ for_each_sg(scat, sg, count, i) {
+ ret = srp_map_sg_entry(state, ch, sg, i);
+ if (ret)
+ goto out;
+ }
ret = srp_finish_mapping(state, ch);
if (ret)
goto out;
+ } else {
+ for_each_sg(scat, sg, count, i) {
+ srp_map_desc(state, ib_sg_dma_address(dev->dev, sg),
+ ib_sg_dma_len(dev->dev, sg), target->rkey);
+ }
}
req->nmdesc = state->nmdesc;
--
2.1.4
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