block/rnbd-clt: Replace {NO_WAIT,WAIT} with RTRS_PERMIT_{WAIT,NOWAIT}

They are defined with the same value and similar meaning, let's remove
one of them, then we can remove {WAIT,NOWAIT}.

Also change the type of 'wait' from 'int' to 'enum wait_type' to make
it clear.

Cc: Leon Romanovsky <leonro@nvidia.com>
Cc: linux-rdma@vger.kernel.org
Signed-off-by: Guoqing Jiang <guoqing.jiang@ionos.com>
Reviewed-by: Md Haris Iqbal <haris.iqbal@ionos.com>
Signed-off-by: Gioh Kim <gi-oh.kim@ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Acked-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Link: https://lore.kernel.org/r/20210419073722.15351-9-gi-oh.kim@ionos.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

drivers/block/rnbd/rnbd-clt.c

@@ -312,13 +312,11 @@ static void rnbd_rerun_all_if_idle(struct rnbd_clt_session *sess)
 
 static struct rtrs_permit *rnbd_get_permit(struct rnbd_clt_session *sess,
 					     enum rtrs_clt_con_type con_type,
-					     int wait)
+					     enum wait_type wait)
 {
 	struct rtrs_permit *permit;
 
-	permit = rtrs_clt_get_permit(sess->rtrs, con_type,
-				      wait ? RTRS_PERMIT_WAIT :
-				      RTRS_PERMIT_NOWAIT);
+	permit = rtrs_clt_get_permit(sess->rtrs, con_type, wait);
 	if (likely(permit))
 		/* We have a subtle rare case here, when all permits can be
 		 * consumed before busy counter increased.  This is safe,
@@ -344,7 +342,7 @@ static void rnbd_put_permit(struct rnbd_clt_session *sess,
 
 static struct rnbd_iu *rnbd_get_iu(struct rnbd_clt_session *sess,
 				     enum rtrs_clt_con_type con_type,
-				     int wait)
+				     enum wait_type wait)
 {
 	struct rnbd_iu *iu;
 	struct rtrs_permit *permit;
@@ -354,9 +352,7 @@ static struct rnbd_iu *rnbd_get_iu(struct rnbd_clt_session *sess,
 		return NULL;
 	}
 
-	permit = rnbd_get_permit(sess, con_type,
-				  wait ? RTRS_PERMIT_WAIT :
-				  RTRS_PERMIT_NOWAIT);
+	permit = rnbd_get_permit(sess, con_type, wait);
 	if (unlikely(!permit)) {
 		kfree(iu);
 		return NULL;
@@ -435,16 +431,11 @@ static void msg_conf(void *priv, int errno)
 	schedule_work(&iu->work);
 }
 
-enum wait_type {
-	NO_WAIT = 0,
-	WAIT    = 1
-};
-
 static int send_usr_msg(struct rtrs_clt *rtrs, int dir,
 			struct rnbd_iu *iu, struct kvec *vec,
 			size_t len, struct scatterlist *sg, unsigned int sg_len,
 			void (*conf)(struct work_struct *work),
-			int *errno, enum wait_type wait)
+			int *errno, int wait)
 {
 	int err;
 	struct rtrs_clt_req_ops req_ops;
@@ -476,7 +467,8 @@ static void msg_close_conf(struct work_struct *work)
 	rnbd_clt_put_dev(dev);
 }
 
-static int send_msg_close(struct rnbd_clt_dev *dev, u32 device_id, bool wait)
+static int send_msg_close(struct rnbd_clt_dev *dev, u32 device_id,
+			  enum wait_type wait)
 {
 	struct rnbd_clt_session *sess = dev->sess;
 	struct rnbd_msg_close msg;
@@ -530,7 +522,7 @@ static void msg_open_conf(struct work_struct *work)
 			 * If server thinks its fine, but we fail to process
 			 * then be nice and send a close to server.
 			 */
-			(void)send_msg_close(dev, device_id, NO_WAIT);
+			send_msg_close(dev, device_id, RTRS_PERMIT_NOWAIT);
 		}
 	}
 	kfree(rsp);
@@ -554,7 +546,7 @@ static void msg_sess_info_conf(struct work_struct *work)
 	rnbd_clt_put_sess(sess);
 }
 
-static int send_msg_open(struct rnbd_clt_dev *dev, bool wait)
+static int send_msg_open(struct rnbd_clt_dev *dev, enum wait_type wait)
 {
 	struct rnbd_clt_session *sess = dev->sess;
 	struct rnbd_msg_open_rsp *rsp;
@@ -601,7 +593,7 @@ static int send_msg_open(struct rnbd_clt_dev *dev, bool wait)
 	return err;
 }
 
-static int send_msg_sess_info(struct rnbd_clt_session *sess, bool wait)
+static int send_msg_sess_info(struct rnbd_clt_session *sess, enum wait_type wait)
 {
 	struct rnbd_msg_sess_info_rsp *rsp;
 	struct rnbd_msg_sess_info msg;
@@ -687,7 +679,7 @@ static void remap_devs(struct rnbd_clt_session *sess)
 	 * be asynchronous.
 	 */
 
-	err = send_msg_sess_info(sess, NO_WAIT);
+	err = send_msg_sess_info(sess, RTRS_PERMIT_NOWAIT);
 	if (err) {
 		pr_err("send_msg_sess_info(\"%s\"): %d\n", sess->sessname, err);
 		return;
@@ -711,7 +703,7 @@ static void remap_devs(struct rnbd_clt_session *sess)
 			continue;
 
 		rnbd_clt_info(dev, "session reconnected, remapping device\n");
-		err = send_msg_open(dev, NO_WAIT);
+		err = send_msg_open(dev, RTRS_PERMIT_NOWAIT);
 		if (err) {
 			rnbd_clt_err(dev, "send_msg_open(): %d\n", err);
 			break;
@@ -1242,7 +1234,7 @@ find_and_get_or_create_sess(const char *sessname,
 	if (err)
 		goto close_rtrs;
 
-	err = send_msg_sess_info(sess, WAIT);
+	err = send_msg_sess_info(sess, RTRS_PERMIT_WAIT);
 	if (err)
 		goto close_rtrs;
 
@@ -1525,7 +1517,7 @@ struct rnbd_clt_dev *rnbd_clt_map_device(const char *sessname,
 		ret = -EEXIST;
 		goto put_dev;
 	}
-	ret = send_msg_open(dev, WAIT);
+	ret = send_msg_open(dev, RTRS_PERMIT_WAIT);
 	if (ret) {
 		rnbd_clt_err(dev,
 			      "map_device: failed, can't open remote device, err: %d\n",
@@ -1559,7 +1551,7 @@ struct rnbd_clt_dev *rnbd_clt_map_device(const char *sessname,
 	return dev;
 
 send_close:
-	send_msg_close(dev, dev->device_id, WAIT);
+	send_msg_close(dev, dev->device_id, RTRS_PERMIT_WAIT);
 del_dev:
 	delete_dev(dev);
 put_dev:
@@ -1619,7 +1611,7 @@ int rnbd_clt_unmap_device(struct rnbd_clt_dev *dev, bool force,
 	destroy_sysfs(dev, sysfs_self);
 	destroy_gen_disk(dev);
 	if (was_mapped && sess->rtrs)
-		send_msg_close(dev, dev->device_id, WAIT);
+		send_msg_close(dev, dev->device_id, RTRS_PERMIT_WAIT);
 
 	rnbd_clt_info(dev, "Device is unmapped\n");
 
@@ -1653,7 +1645,7 @@ int rnbd_clt_remap_device(struct rnbd_clt_dev *dev)
 	mutex_unlock(&dev->lock);
 	if (!err) {
 		rnbd_clt_info(dev, "Remapping device.\n");
-		err = send_msg_open(dev, WAIT);
+		err = send_msg_open(dev, RTRS_PERMIT_WAIT);
 		if (err)
 			rnbd_clt_err(dev, "remap_device: %d\n", err);
 	}

drivers/infiniband/ulp/rtrs/rtrs-clt.c

@@ -103,11 +103,11 @@ static inline void __rtrs_put_permit(struct rtrs_clt *clt,
  *    up earlier.
  *
  * Context:
- *    Can sleep if @wait == RTRS_TAG_WAIT
+ *    Can sleep if @wait == RTRS_PERMIT_WAIT
  */
 struct rtrs_permit *rtrs_clt_get_permit(struct rtrs_clt *clt,
 					  enum rtrs_clt_con_type con_type,
-					  int can_wait)
+					  enum wait_type can_wait)
 {
 	struct rtrs_permit *permit;
 	DEFINE_WAIT(wait);

drivers/infiniband/ulp/rtrs/rtrs.h

@@ -63,9 +63,9 @@ struct rtrs_clt *rtrs_clt_open(struct rtrs_clt_ops *ops,
 
 void rtrs_clt_close(struct rtrs_clt *sess);
 
-enum {
+enum wait_type {
 	RTRS_PERMIT_NOWAIT = 0,
-	RTRS_PERMIT_WAIT   = 1,
+	RTRS_PERMIT_WAIT   = 1
 };
 
 /**
@@ -81,7 +81,7 @@ enum rtrs_clt_con_type {
 
 struct rtrs_permit *rtrs_clt_get_permit(struct rtrs_clt *sess,
 				    enum rtrs_clt_con_type con_type,
-				    int wait);
+				    enum wait_type wait);
 
 void rtrs_clt_put_permit(struct rtrs_clt *sess, struct rtrs_permit *permit);