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>

diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.h b/drivers/infiniband/ulp/iser/iscsi_iser.h
index 8a5663d..e34263c 100644 (file)
--- 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 a70fd9a..d832705 100644 (file)
--- 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 fb5ec35..ad493d2 100644 (file)
--- 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);