devlink: remove reporter reference counting

As long as the reporter life time is protected by devlink instance
lock, the reference counting is no longer needed. Remove it.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 30 insertions, 83 deletions

diff --git a/net/devlink/leftover.c b/net/devlink/leftover.c
index d4e8c285b255..114baecebaeb 100644
--- a/net/devlink/leftover.c
+++ b/net/devlink/leftover.c
@@ -7269,7 +7269,6 @@ struct devlink_health_reporter {
 	u64 error_count;
 	u64 recovery_count;
 	u64 last_recovery_ts;
-	refcount_t refcount;
 };
 
 void *
@@ -7328,7 +7327,6 @@ __devlink_health_reporter_create(struct devlink *devlink,
 	reporter->auto_recover = !!ops->recover;
 	reporter->auto_dump = !!ops->dump;
 	mutex_init(&reporter->dump_lock);
-	refcount_set(&reporter->refcount, 1);
 	return reporter;
 }
 
@@ -7435,13 +7433,6 @@ devlink_health_reporter_free(struct devlink_health_reporter *reporter)
 	kfree(reporter);
 }
 
-static void
-devlink_health_reporter_put(struct devlink_health_reporter *reporter)
-{
-	if (refcount_dec_and_test(&reporter->refcount))
-		devlink_health_reporter_free(reporter);
-}
-
 /**
  *	devl_health_reporter_destroy - destroy devlink health reporter
  *
@@ -7453,7 +7444,7 @@ devl_health_reporter_destroy(struct devlink_health_reporter *reporter)
 	devl_assert_locked(reporter->devlink);
 
 	list_del(&reporter->list);
-	devlink_health_reporter_put(reporter);
+	devlink_health_reporter_free(reporter);
 }
 EXPORT_SYMBOL_GPL(devl_health_reporter_destroy);
 
@@ -7697,7 +7688,6 @@ static struct devlink_health_reporter *
 devlink_health_reporter_get_from_attrs(struct devlink *devlink,
 				       struct nlattr **attrs)
 {
-	struct devlink_health_reporter *reporter;
 	struct devlink_port *devlink_port;
 	char *reporter_name;
 
@@ -7706,17 +7696,12 @@ devlink_health_reporter_get_from_attrs(struct devlink *devlink,
 
 	reporter_name = nla_data(attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME]);
 	devlink_port = devlink_port_get_from_attrs(devlink, attrs);
-	if (IS_ERR(devlink_port)) {
-		reporter = devlink_health_reporter_find_by_name(devlink, reporter_name);
-		if (reporter)
-			refcount_inc(&reporter->refcount);
-	} else {
-		reporter = devlink_port_health_reporter_find_by_name(devlink_port, reporter_name);
-		if (reporter)
-			refcount_inc(&reporter->refcount);
-	}
-
-	return reporter;
+	if (IS_ERR(devlink_port))
+		return devlink_health_reporter_find_by_name(devlink,
+							    reporter_name);
+	else
+		return devlink_port_health_reporter_find_by_name(devlink_port,
+								 reporter_name);
 }
 
 static struct devlink_health_reporter *
@@ -7775,10 +7760,8 @@ static int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
 		return -EINVAL;
 
 	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
-	if (!msg) {
-		err = -ENOMEM;
-		goto out;
-	}
+	if (!msg)
+		return -ENOMEM;
 
 	err = devlink_nl_health_reporter_fill(msg, reporter,
 					      DEVLINK_CMD_HEALTH_REPORTER_GET,
@@ -7786,13 +7769,10 @@ static int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
 					      0);
 	if (err) {
 		nlmsg_free(msg);
-		goto out;
+		return err;
 	}
 
-	err = genlmsg_reply(msg, info);
-out:
-	devlink_health_reporter_put(reporter);
-	return err;
+	return genlmsg_reply(msg, info);
 }
 
 static int
@@ -7866,7 +7846,6 @@ devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
 {
 	struct devlink *devlink = info->user_ptr[0];
 	struct devlink_health_reporter *reporter;
-	int err;
 
 	reporter = devlink_health_reporter_get_from_info(devlink, info);
 	if (!reporter)
@@ -7874,15 +7853,12 @@ devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
 
 	if (!reporter->ops->recover &&
 	    (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] ||
-	     info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])) {
-		err = -EOPNOTSUPP;
-		goto out;
-	}
+	     info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]))
+		return -EOPNOTSUPP;
+
 	if (!reporter->ops->dump &&
-	    info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP]) {
-		err = -EOPNOTSUPP;
-		goto out;
-	}
+	    info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP])
+		return -EOPNOTSUPP;
 
 	if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD])
 		reporter->graceful_period =
@@ -7896,11 +7872,7 @@ devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
 		reporter->auto_dump =
 		nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP]);
 
-	devlink_health_reporter_put(reporter);
 	return 0;
-out:
-	devlink_health_reporter_put(reporter);
-	return err;
 }
 
 static int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
@@ -7908,16 +7880,12 @@ static int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
 {
 	struct devlink *devlink = info->user_ptr[0];
 	struct devlink_health_reporter *reporter;
-	int err;
 
 	reporter = devlink_health_reporter_get_from_info(devlink, info);
 	if (!reporter)
 		return -EINVAL;
 
-	err = devlink_health_reporter_recover(reporter, NULL, info->extack);
-
-	devlink_health_reporter_put(reporter);
-	return err;
+	return devlink_health_reporter_recover(reporter, NULL, info->extack);
 }
 
 static int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
@@ -7932,36 +7900,27 @@ static int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
 	if (!reporter)
 		return -EINVAL;
 
-	if (!reporter->ops->diagnose) {
-		devlink_health_reporter_put(reporter);
+	if (!reporter->ops->diagnose)
 		return -EOPNOTSUPP;
-	}
 
 	fmsg = devlink_fmsg_alloc();
-	if (!fmsg) {
-		devlink_health_reporter_put(reporter);
+	if (!fmsg)
 		return -ENOMEM;
-	}
 
 	err = devlink_fmsg_obj_nest_start(fmsg);
 	if (err)
-		goto out;
+		return err;
 
 	err = reporter->ops->diagnose(reporter, fmsg, info->extack);
 	if (err)
-		goto out;
+		return err;
 
 	err = devlink_fmsg_obj_nest_end(fmsg);
 	if (err)
-		goto out;
-
-	err = devlink_fmsg_snd(fmsg, info,
-			       DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, 0);
+		return err;
 
-out:
-	devlink_fmsg_free(fmsg);
-	devlink_health_reporter_put(reporter);
-	return err;
+	return devlink_fmsg_snd(fmsg, info,
+				DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, 0);
 }
 
 static int
@@ -7976,10 +7935,9 @@ devlink_nl_cmd_health_reporter_dump_get_dumpit(struct sk_buff *skb,
 	if (!reporter)
 		return -EINVAL;
 
-	if (!reporter->ops->dump) {
-		err = -EOPNOTSUPP;
-		goto out;
-	}
+	if (!reporter->ops->dump)
+		return -EOPNOTSUPP;
+
 	mutex_lock(&reporter->dump_lock);
 	if (!state->idx) {
 		err = devlink_health_do_dump(reporter, NULL, cb->extack);
@@ -7997,8 +7955,6 @@ devlink_nl_cmd_health_reporter_dump_get_dumpit(struct sk_buff *skb,
 				  DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET);
 unlock:
 	mutex_unlock(&reporter->dump_lock);
-out:
-	devlink_health_reporter_put(reporter);
 	return err;
 }
 
@@ -8013,15 +7969,12 @@ devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
 	if (!reporter)
 		return -EINVAL;
 
-	if (!reporter->ops->dump) {
-		devlink_health_reporter_put(reporter);
+	if (!reporter->ops->dump)
 		return -EOPNOTSUPP;
-	}
 
 	mutex_lock(&reporter->dump_lock);
 	devlink_health_dump_clear(reporter);
 	mutex_unlock(&reporter->dump_lock);
-	devlink_health_reporter_put(reporter);
 	return 0;
 }
 
@@ -8030,21 +7983,15 @@ static int devlink_nl_cmd_health_reporter_test_doit(struct sk_buff *skb,
 {
 	struct devlink *devlink = info->user_ptr[0];
 	struct devlink_health_reporter *reporter;
-	int err;
 
 	reporter = devlink_health_reporter_get_from_info(devlink, info);
 	if (!reporter)
 		return -EINVAL;
 
-	if (!reporter->ops->test) {
-		devlink_health_reporter_put(reporter);
+	if (!reporter->ops->test)
 		return -EOPNOTSUPP;
-	}
-
-	err = reporter->ops->test(reporter, info->extack);
 
-	devlink_health_reporter_put(reporter);
-	return err;
+	return reporter->ops->test(reporter, info->extack);
 }
 
 struct devlink_stats {