RDMA/irdma: Split CQ handler into irdma_reg_user_mr_type_cq

Split the source codes related with CQ handling into a new function.
Reviewed-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Zhu Yanjun <yanjun.zhu@linux.dev>
Link: https://lore.kernel.org/r/20230116193502.66540-5-yanjun.zhu@intel.comSigned-off-by: Leon Romanovsky <leon@kernel.org>

drivers/infiniband/hw/irdma/verbs.c

@@ -2867,6 +2867,40 @@ static int irdma_reg_user_mr_type_qp(struct irdma_mem_reg_req req,
 	return 0;
 }
 
+static int irdma_reg_user_mr_type_cq(struct irdma_mem_reg_req req,
+				     struct ib_udata *udata,
+				     struct irdma_mr *iwmr)
+{
+	struct irdma_device *iwdev = to_iwdev(iwmr->ibmr.device);
+	struct irdma_pbl *iwpbl = &iwmr->iwpbl;
+	struct irdma_ucontext *ucontext = NULL;
+	u8 shadow_pgcnt = 1;
+	unsigned long flags;
+	bool use_pbles;
+	u32 total;
+	int err;
+
+	if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_CQ_RESIZE)
+		shadow_pgcnt = 0;
+	total = req.cq_pages + shadow_pgcnt;
+	if (total > iwmr->page_cnt)
+		return -EINVAL;
+
+	use_pbles = req.cq_pages > 1;
+	err = irdma_handle_q_mem(iwdev, &req, iwpbl, use_pbles);
+	if (err)
+		return err;
+
+	ucontext = rdma_udata_to_drv_context(udata, struct irdma_ucontext,
+					     ibucontext);
+	spin_lock_irqsave(&ucontext->cq_reg_mem_list_lock, flags);
+	list_add_tail(&iwpbl->list, &ucontext->cq_reg_mem_list);
+	iwpbl->on_list = true;
+	spin_unlock_irqrestore(&ucontext->cq_reg_mem_list_lock, flags);
+
+	return 0;
+}
+
 /**
  * irdma_reg_user_mr - Register a user memory region
  * @pd: ptr of pd
@@ -2882,16 +2916,10 @@ static struct ib_mr *irdma_reg_user_mr(struct ib_pd *pd, u64 start, u64 len,
 {
 #define IRDMA_MEM_REG_MIN_REQ_LEN offsetofend(struct irdma_mem_reg_req, sq_pages)
 	struct irdma_device *iwdev = to_iwdev(pd->device);
-	struct irdma_ucontext *ucontext;
-	struct irdma_pbl *iwpbl;
-	struct irdma_mr *iwmr;
-	struct ib_umem *region;
-	struct irdma_mem_reg_req req;
-	u32 total;
-	u8 shadow_pgcnt = 1;
-	bool use_pbles = false;
-	unsigned long flags;
-	int err = -EINVAL;
+	struct irdma_mem_reg_req req = {};
+	struct ib_umem *region = NULL;
+	struct irdma_mr *iwmr = NULL;
+	int err;
 
 	if (len > iwdev->rf->sc_dev.hw_attrs.max_mr_size)
 		return ERR_PTR(-EINVAL);
@@ -2918,8 +2946,6 @@ static struct ib_mr *irdma_reg_user_mr(struct ib_pd *pd, u64 start, u64 len,
 		return (struct ib_mr *)iwmr;
 	}
 
-	iwpbl = &iwmr->iwpbl;
-
 	switch (req.reg_type) {
 	case IRDMA_MEMREG_TYPE_QP:
 		err = irdma_reg_user_mr_type_qp(req, udata, iwmr);
@@ -2928,25 +2954,9 @@ static struct ib_mr *irdma_reg_user_mr(struct ib_pd *pd, u64 start, u64 len,
 
 		break;
 	case IRDMA_MEMREG_TYPE_CQ:
-		if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_CQ_RESIZE)
-			shadow_pgcnt = 0;
-		total = req.cq_pages + shadow_pgcnt;
-		if (total > iwmr->page_cnt) {
-			err = -EINVAL;
-			goto error;
-		}
-
-		use_pbles = (req.cq_pages > 1);
-		err = irdma_handle_q_mem(iwdev, &req, iwpbl, use_pbles);
+		err = irdma_reg_user_mr_type_cq(req, udata, iwmr);
 		if (err)
 			goto error;
-
-		ucontext = rdma_udata_to_drv_context(udata, struct irdma_ucontext,
-						     ibucontext);
-		spin_lock_irqsave(&ucontext->cq_reg_mem_list_lock, flags);
-		list_add_tail(&iwpbl->list, &ucontext->cq_reg_mem_list);
-		iwpbl->on_list = true;
-		spin_unlock_irqrestore(&ucontext->cq_reg_mem_list_lock, flags);
 		break;
 	case IRDMA_MEMREG_TYPE_MEM:
 		err = irdma_reg_user_mr_type_mem(iwmr, access);
@@ -2955,6 +2965,7 @@ static struct ib_mr *irdma_reg_user_mr(struct ib_pd *pd, u64 start, u64 len,
 
 		break;
 	default:
+		err = -EINVAL;
 		goto error;
 	}