From 7a9b3ec1e19f691f6e69429d851a4084b86e6219 Mon Sep 17 00:00:00 2001
From: Johannes Berg <johannes.berg@intel.com>
Date: Wed, 31 Jan 2018 23:07:06 +0100
Subject: [PATCH] nl80211: remove unnecessary genlmsg_cancel() calls
Git-commit: 7a9b3ec1e19f691f6e69429d851a4084b86e6219
Patch-mainline: v4.17-rc1
References: FATE#326294

If we free the message immediately, there's no reason to
trim it back to the previous size.

Done with spatch:

@@
identifier msg, hdr;
@@
-if (hdr)
-  genlmsg_cancel(msg, hdr);
... when != msg;
 nlmsg_free(msg);

@@
identifier msg, hdr;
@@
-genlmsg_cancel(msg, hdr);
... when != msg;
 nlmsg_free(msg);

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 net/wireless/nl80211.c | 28 ----------------------------
 1 file changed, 28 deletions(-)

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index cc6ec5bab676..412ed8676306 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -5847,7 +5847,6 @@ static int nl80211_get_mesh_config(struct sk_buff *skb,
 	return genlmsg_reply(msg, info);
 
  nla_put_failure:
-	genlmsg_cancel(msg, hdr);
  out:
 	nlmsg_free(msg);
 	return -ENOBUFS;
@@ -6328,7 +6327,6 @@ static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
 nla_put_failure_rcu:
 	rcu_read_unlock();
 nla_put_failure:
-	genlmsg_cancel(msg, hdr);
 put_failure:
 	nlmsg_free(msg);
 	return -EMSGSIZE;
@@ -13732,7 +13730,6 @@ void nl80211_common_reg_change_event(enum nl80211_commands cmd_id,
 	return;
 
 nla_put_failure:
-	genlmsg_cancel(msg, hdr);
 	nlmsg_free(msg);
 }
 
@@ -13780,7 +13777,6 @@ static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
 	return;
 
  nla_put_failure:
-	genlmsg_cancel(msg, hdr);
 	nlmsg_free(msg);
 }
 
@@ -13868,7 +13864,6 @@ static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
 	return;
 
  nla_put_failure:
-	genlmsg_cancel(msg, hdr);
 	nlmsg_free(msg);
 }
 
@@ -13944,7 +13939,6 @@ void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
 	return;
 
  nla_put_failure:
-	genlmsg_cancel(msg, hdr);
 	nlmsg_free(msg);
 }
 
@@ -13984,7 +13978,6 @@ void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
 	return;
 
  nla_put_failure:
-	genlmsg_cancel(msg, hdr);
 	nlmsg_free(msg);
 }
 
@@ -14014,7 +14007,6 @@ void nl80211_send_port_authorized(struct cfg80211_registered_device *rdev,
 	return;
 
  nla_put_failure:
-	genlmsg_cancel(msg, hdr);
 	nlmsg_free(msg);
 }
 
@@ -14051,7 +14043,6 @@ void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
 	return;
 
  nla_put_failure:
-	genlmsg_cancel(msg, hdr);
 	nlmsg_free(msg);
 }
 
@@ -14084,7 +14075,6 @@ void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
 	return;
 
  nla_put_failure:
-	genlmsg_cancel(msg, hdr);
 	nlmsg_free(msg);
 }
 
@@ -14125,7 +14115,6 @@ void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
 	return;
 
  nla_put_failure:
-	genlmsg_cancel(msg, hdr);
 	nlmsg_free(msg);
 }
 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
@@ -14164,7 +14153,6 @@ void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
 	return;
 
  nla_put_failure:
-	genlmsg_cancel(msg, hdr);
 	nlmsg_free(msg);
 }
 
@@ -14219,7 +14207,6 @@ void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
 	return;
 
 nla_put_failure:
-	genlmsg_cancel(msg, hdr);
 	nlmsg_free(msg);
 }
 
@@ -14265,7 +14252,6 @@ static void nl80211_send_remain_on_chan_event(
 	return;
 
  nla_put_failure:
-	genlmsg_cancel(msg, hdr);
 	nlmsg_free(msg);
 }
 
@@ -14379,7 +14365,6 @@ void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
 	return;
 
  nla_put_failure:
-	genlmsg_cancel(msg, hdr);
 	nlmsg_free(msg);
 }
 EXPORT_SYMBOL(cfg80211_conn_failed);
@@ -14416,7 +14401,6 @@ static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
 	return true;
 
  nla_put_failure:
-	genlmsg_cancel(msg, hdr);
 	nlmsg_free(msg);
 	return true;
 }
@@ -14500,7 +14484,6 @@ int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
 	return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
 
  nla_put_failure:
-	genlmsg_cancel(msg, hdr);
 	nlmsg_free(msg);
 	return -ENOBUFS;
 }
@@ -14544,7 +14527,6 @@ void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
 	return;
 
  nla_put_failure:
-	genlmsg_cancel(msg, hdr);
 	nlmsg_free(msg);
 }
 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
@@ -14753,7 +14735,6 @@ static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
 	return;
 
  nla_put_failure:
-	genlmsg_cancel(msg, hdr);
 	nlmsg_free(msg);
 }
 
@@ -14811,7 +14792,6 @@ nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
 	return;
 
  nla_put_failure:
-	genlmsg_cancel(msg, hdr);
 	nlmsg_free(msg);
 }
 
@@ -14864,7 +14844,6 @@ static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
 	return;
 
  nla_put_failure:
-	genlmsg_cancel(msg, hdr);
 	nlmsg_free(msg);
 }
 
@@ -14946,7 +14925,6 @@ nl80211_radar_notify(struct cfg80211_registered_device *rdev,
 	return;
 
  nla_put_failure:
-	genlmsg_cancel(msg, hdr);
 	nlmsg_free(msg);
 }
 
@@ -15041,7 +15019,6 @@ void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
 	return;
 
  nla_put_failure:
-	genlmsg_cancel(msg, hdr);
 	nlmsg_free(msg);
 }
 EXPORT_SYMBOL(cfg80211_probe_status);
@@ -15086,8 +15063,6 @@ void cfg80211_report_obss_beacon(struct wiphy *wiphy,
 
  nla_put_failure:
 	spin_unlock_bh(&rdev->beacon_registrations_lock);
-	if (hdr)
-		genlmsg_cancel(msg, hdr);
 	nlmsg_free(msg);
 }
 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
@@ -15303,7 +15278,6 @@ void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
 	return;
 
  nla_put_failure:
-	genlmsg_cancel(msg, hdr);
 	nlmsg_free(msg);
 }
 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
@@ -15448,8 +15422,6 @@ void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
 	return;
 
  nla_put_failure:
-	if (hdr)
-		genlmsg_cancel(msg, hdr);
 	nlmsg_free(msg);
 }
 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
-- 
2.19.2