IB/iser: Remove redundant is_mr indicator

It is enough to check mem_h pointer assignment, mem_h == NULL will
indicate that buffer is not registered using mr.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

3 files changed, 4 insertions, 13 deletions

diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.h b/drivers/infiniband/ulp/iser/iscsi_iser.h
index 8a5663dae87a..e34263cbecc3 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.h
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.h
@@ -252,7 +252,6 @@ struct iscsi_endpoint;
  * @va:           MR start address (buffer va)
  * @len:          MR length
  * @mem_h:        pointer to registration context (FMR/Fastreg)
- * @is_mr:        indicates weather we registered the buffer
  */
 struct iser_mem_reg {
         u32  lkey;
@@ -260,7 +259,6 @@ struct iser_mem_reg {
         u64  va;
         u64  len;
         void *mem_h;
-        int  is_mr;
 };
 
 /**
diff --git a/drivers/infiniband/ulp/iser/iser_memory.c b/drivers/infiniband/ulp/iser/iser_memory.c
index a70fd9ae7567..d83270511079 100644
--- a/drivers/infiniband/ulp/iser/iser_memory.c
+++ b/drivers/infiniband/ulp/iser/iser_memory.c
@@ -408,7 +408,6 @@ int iser_reg_rdma_mem_fmr(struct iscsi_iser_task *iser_task,
                 regd_buf->reg.rkey = device->mr->rkey;
                 regd_buf->reg.len  = ib_sg_dma_len(ibdev, &sg[0]);
                 regd_buf->reg.va   = ib_sg_dma_address(ibdev, &sg[0]);
-                regd_buf->reg.is_mr = 0;
 
                 iser_dbg("PHYSICAL Mem.register: lkey: 0x%08X rkey: 0x%08X  "
                          "va: 0x%08lX sz: %ld]\n",
@@ -769,15 +768,11 @@ int iser_reg_rdma_mem_fastreg(struct iscsi_iser_task *iser_task,
                 regd_buf->reg.rkey = desc->pi_ctx->sig_mr->rkey;
                 regd_buf->reg.va = sig_sge.addr;
                 regd_buf->reg.len = sig_sge.length;
-                regd_buf->reg.is_mr = 1;
         } else {
-                if (desc) {
+                if (desc)
                         regd_buf->reg.rkey = desc->data_mr->rkey;
-                        regd_buf->reg.is_mr = 1;
-                } else {
+                else
                         regd_buf->reg.rkey = device->mr->rkey;
-                        regd_buf->reg.is_mr = 0;
-                }
 
                 regd_buf->reg.lkey = data_sge.lkey;
                 regd_buf->reg.va = data_sge.addr;
diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c
index fb5ec3553de8..ad493d285be1 100644
--- a/drivers/infiniband/ulp/iser/iser_verbs.c
+++ b/drivers/infiniband/ulp/iser/iser_verbs.c
@@ -1009,7 +1009,6 @@ int iser_reg_page_vec(struct ib_conn *ib_conn,
         mem_reg->rkey  = mem->fmr->rkey;
         mem_reg->len   = page_vec->length * SIZE_4K;
         mem_reg->va    = io_addr;
-        mem_reg->is_mr = 1;
         mem_reg->mem_h = (void *)mem;
 
         mem_reg->va   += page_vec->offset;
@@ -1036,7 +1035,7 @@ void iser_unreg_mem_fmr(struct iscsi_iser_task *iser_task,
         struct iser_mem_reg *reg = &iser_task->rdma_regd[cmd_dir].reg;
         int ret;
 
-        if (!reg->is_mr)
+        if (!reg->mem_h)
                 return;
 
         iser_dbg("PHYSICAL Mem.Unregister mem_h %p\n",reg->mem_h);
@@ -1056,11 +1055,10 @@ void iser_unreg_mem_fastreg(struct iscsi_iser_task *iser_task,
         struct ib_conn *ib_conn = &iser_conn->ib_conn;
         struct fast_reg_descriptor *desc = reg->mem_h;
 
-        if (!reg->is_mr)
+        if (!desc)
                 return;
 
         reg->mem_h = NULL;
-        reg->is_mr = 0;
         spin_lock_bh(&ib_conn->lock);
         list_add_tail(&desc->list, &ib_conn->fastreg.pool);
         spin_unlock_bh(&ib_conn->lock);