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From:   Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>
To:     linux-wireless@vger.kernel.org
CC:     Tamizh Chelvam <tamizhr@codeaurora.org>,
        Johannes Berg <johannes@sipsolutions.net>,
        Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>
Subject: [RFC PATCH 4/4] nl80211: simplify peer specific TID configuration
Date:   Mon, 20 Apr 2020 14:34:37 +0300
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Current rule for applying TID configuration for specific peer looks overly
complicated. No need to reject new TID configuration when override flag is
specified. Another call with the same TID configuration, but without
override flag, allows to apply new configuration anyway.

Use the same approach as for the 'all peers' case: if override flag is
specified, then reset existing TID configuration and immediately
apply a new one.

Signed-off-by: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>
---
 include/uapi/linux/nl80211.h | 10 ++++------
 net/wireless/nl80211.c       |  5 +----
 2 files changed, 5 insertions(+), 10 deletions(-)

diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index 1bf34a39c776..003e25ce3899 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -4807,12 +4807,10 @@ enum nl80211_tid_config {
  *	(%NL80211_TID_CONFIG_ATTR_TIDS, %NL80211_TID_CONFIG_ATTR_OVERRIDE).
  * @NL80211_TID_CONFIG_ATTR_PEER_SUPP: same as the previous per-vif one, but
  *	per peer instead.
- * @NL80211_TID_CONFIG_ATTR_OVERRIDE: flag attribue, if no peer
- *	is selected, if set indicates that the new configuration overrides
- *	all previous peer configurations, otherwise previous peer specific
- *	configurations should be left untouched. If peer is selected then
- *	it will reset particular TID configuration of that peer and it will
- *	not accept other TID config attributes along with peer.
+ * @NL80211_TID_CONFIG_ATTR_OVERRIDE: flag attribue, if set indicates
+ *	that the new configuration overrides all previous peer
+ *	configurations, otherwise previous peer specific configurations
+ *	should be left untouched.
  * @NL80211_TID_CONFIG_ATTR_TIDS: a bitmask value of TIDs (bit 0 to 7)
  *	Its type is u16.
  * @NL80211_TID_CONFIG_ATTR_NOACK: Configure ack policy for the TID.
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index ea0e588b6f6a..03f7870875a0 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -14058,10 +14058,7 @@ static int parse_tid_conf(struct cfg80211_registered_device *rdev,
 		if (rdev->ops->reset_tid_config) {
 			err = rdev_reset_tid_config(rdev, dev, peer,
 						    tid_conf->tids);
-			/* If peer is there no other configuration will be
-			 * allowed
-			 */
-			if (err || peer)
+			if (err)
 				return err;
 		} else {
 			return -EINVAL;
-- 
2.11.0