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[076/379,SRU,OEM-5.6] ath11k: fix duplication peer create on same radio

Message ID 20201223085152.554896-77-vicamo.yang@canonical.com
State Accepted
Headers show
Series Support Qualcomm QCA6390 via ath11k driver | expand

Commit Message

You-Sheng Yang Dec. 23, 2020, 8:46 a.m. UTC 
From: Karthikeyan Periyasamy <periyasa@codeaurora.org>

BugLink: https://bugs.launchpad.net/bugs/1879633

Add the pdev index information in the peer object to validate
the peer creation. Ignore the peer creation request, if the given
MAC address is already present in the peer list with same radio.
If we allow the peer creation in above scenario, FW assert will happen.
Above scenario occurred in two cases, where Multiple AP VAP created in
the same radio.

1. when testing tool sends association request to two AP with same
   MAC address
2. when a station do roaming from one AP VAP to another AP VAP.

Signed-off-by: Karthikeyan Periyasamy <periyasa@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1586343795-21422-1-git-send-email-periyasa@codeaurora.org
(cherry picked from commit 1e744bf218b54d2e241aa6107484828d4f4a9fdc)
Signed-off-by: You-Sheng Yang <vicamo.yang@canonical.com>
---
 drivers/net/wireless/ath/ath11k/peer.c | 35 ++++++++++++++++++++++++--
 drivers/net/wireless/ath/ath11k/peer.h |  1 +
 2 files changed, 34 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/wireless/ath/ath11k/peer.c b/drivers/net/wireless/ath/ath11k/peer.c
index f43deacc01bd..297172538620 100644
--- a/drivers/net/wireless/ath/ath11k/peer.c
+++ b/drivers/net/wireless/ath/ath11k/peer.c
@@ -17,7 +17,26 @@  struct ath11k_peer *ath11k_peer_find(struct ath11k_base *ab, int vdev_id,
 	list_for_each_entry(peer, &ab->peers, list) {
 		if (peer->vdev_id != vdev_id)
 			continue;
-		if (memcmp(peer->addr, addr, ETH_ALEN))
+		if (!ether_addr_equal(peer->addr, addr))
+			continue;
+
+		return peer;
+	}
+
+	return NULL;
+}
+
+static struct ath11k_peer *ath11k_peer_find_by_pdev_idx(struct ath11k_base *ab,
+							u8 pdev_idx, const u8 *addr)
+{
+	struct ath11k_peer *peer;
+
+	lockdep_assert_held(&ab->base_lock);
+
+	list_for_each_entry(peer, &ab->peers, list) {
+		if (peer->pdev_idx != pdev_idx)
+			continue;
+		if (!ether_addr_equal(peer->addr, addr))
 			continue;
 
 		return peer;
@@ -34,7 +53,7 @@  struct ath11k_peer *ath11k_peer_find_by_addr(struct ath11k_base *ab,
 	lockdep_assert_held(&ab->base_lock);
 
 	list_for_each_entry(peer, &ab->peers, list) {
-		if (memcmp(peer->addr, addr, ETH_ALEN))
+		if (!ether_addr_equal(peer->addr, addr))
 			continue;
 
 		return peer;
@@ -200,6 +219,17 @@  int ath11k_peer_create(struct ath11k *ar, struct ath11k_vif *arvif,
 		return -ENOBUFS;
 	}
 
+	spin_lock_bh(&ar->ab->base_lock);
+	peer = ath11k_peer_find_by_pdev_idx(ar->ab, ar->pdev_idx, param->peer_addr);
+	if (peer) {
+		spin_unlock_bh(&ar->ab->base_lock);
+		ath11k_info(ar->ab,
+			    "ignoring the peer %pM creation on same pdev idx %d\n",
+			    param->peer_addr, ar->pdev_idx);
+		return -EINVAL;
+	}
+	spin_unlock_bh(&ar->ab->base_lock);
+
 	ret = ath11k_wmi_send_peer_create_cmd(ar, param);
 	if (ret) {
 		ath11k_warn(ar->ab,
@@ -225,6 +255,7 @@  int ath11k_peer_create(struct ath11k *ar, struct ath11k_vif *arvif,
 		return -ENOENT;
 	}
 
+	peer->pdev_idx = ar->pdev_idx;
 	peer->sta = sta;
 	arvif->ast_hash = peer->ast_hash;
 
diff --git a/drivers/net/wireless/ath/ath11k/peer.h b/drivers/net/wireless/ath/ath11k/peer.h
index ccca1523a6ea..5d125ce8984e 100644
--- a/drivers/net/wireless/ath/ath11k/peer.h
+++ b/drivers/net/wireless/ath/ath11k/peer.h
@@ -13,6 +13,7 @@  struct ath11k_peer {
 	u8 addr[ETH_ALEN];
 	int peer_id;
 	u16 ast_hash;
+	u8 pdev_idx;
 
 	/* protected by ab->data_lock */
 	struct ieee80211_key_conf *keys[WMI_MAX_KEY_INDEX + 1];