IB/srp: Fix srp_map_sg_dma()

Because patch "IB/srp: Move common code into the caller" was applied
partially srp_map_sg_dma() doesn't work properly. Fix this by
applying the remainder of that patch. See also
http://thread.gmane.org/gmane.linux.drivers.rdma/35803/focus=35811.

Fixes: 3849e44d1c4b ("IB/srp: Move common code into the caller")
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Mike Marciniszyn <mike.marciniszyn@intel.com>
Cc: Sagi Grimberg <sai@grimberg.me>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Laurence Oberman <loberman@redhat.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index bc24b8d..3322ed7 100644 (file)
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -1457,7 +1457,6 @@ static int srp_map_sg_fr(struct srp_map_state *state, struct srp_rdma_ch *ch,
 {
        unsigned int sg_offset = 0;
 
-       state->desc = req->indirect_desc;
        state->fr.next = req->fr_list;
        state->fr.end = req->fr_list + ch->target->mr_per_cmd;
        state->sg = scat;
@@ -1489,7 +1488,6 @@ static int srp_map_sg_dma(struct srp_map_state *state, struct srp_rdma_ch *ch,
        struct scatterlist *sg;
        int i;
 
-       state->desc = req->indirect_desc;
        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),
@@ -1655,6 +1653,7 @@ static int srp_map_data(struct scsi_cmnd *scmnd, struct srp_rdma_ch *ch,
                                   target->indirect_size, DMA_TO_DEVICE);
 
        memset(&state, 0, sizeof(state));
+       state.desc = req->indirect_desc;
        if (dev->use_fast_reg)
                ret = srp_map_sg_fr(&state, ch, req, scat, count);
        else if (dev->use_fmr)