RDMA/hns: Clean up unnecessary variable initialization

Here Clean up unnecessary initial value for some variable.
Signed-off-by: Lang Cheng <chenglang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/hns/hns_roce_cmd.c

@@ -161,7 +161,7 @@ static int hns_roce_cmd_mbox_wait(struct hns_roce_dev *hr_dev, u64 in_param,
 				  u64 out_param, unsigned long in_modifier,
 				  u8 op_modifier, u16 op, unsigned long timeout)
 {
-	int ret = 0;
+	int ret;
 
 	down(&hr_dev->cmd.event_sem);
 	ret = __hns_roce_cmd_mbox_wait(hr_dev, in_param, out_param,

drivers/infiniband/hw/hns/hns_roce_hw_v2.c

@@ -2018,7 +2018,7 @@ static int hns_roce_v2_chk_mbox(struct hns_roce_dev *hr_dev,
 				unsigned long timeout)
 {
 	struct device *dev = hr_dev->dev;
-	unsigned long end = 0;
+	unsigned long end;
 	u32 status;
 
 	end = msecs_to_jiffies(timeout) + jiffies;
@@ -3016,7 +3016,7 @@ static int hns_roce_v2_clear_hem(struct hns_roce_dev *hr_dev,
 {
 	struct device *dev = hr_dev->dev;
 	struct hns_roce_cmd_mailbox *mailbox;
-	int ret = 0;
+	int ret;
 	u16 op = 0xff;
 
 	if (!hns_roce_check_whether_mhop(hr_dev, table->type))

drivers/infiniband/hw/hns/hns_roce_main.c

@@ -309,7 +309,7 @@ static int hns_roce_modify_port(struct ib_device *ib_dev, u8 port_num, int mask,
 static int hns_roce_alloc_ucontext(struct ib_ucontext *uctx,
 				   struct ib_udata *udata)
 {
-	int ret = 0;
+	int ret;
 	struct hns_roce_ucontext *context = to_hr_ucontext(uctx);
 	struct hns_roce_ib_alloc_ucontext_resp resp = {};
 	struct hns_roce_dev *hr_dev = to_hr_dev(uctx->device);

drivers/infiniband/hw/hns/hns_roce_pd.c

@@ -92,7 +92,7 @@ void hns_roce_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
 int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
 {
 	struct resource *res;
-	int ret = 0;
+	int ret;
 
 	/* Using bitmap to manager UAR index */
 	ret = hns_roce_bitmap_alloc(&hr_dev->uar_table.bitmap, &uar->logic_idx);