linux-kernel - [PATCH 1/2] Bluetooth: Use ext adv handle from requests in CCs

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Date:   Mon,  5 Apr 2021 16:33:04 -0700
From:   Daniel Winkler <danielwinkler@...gle.com>
To:     marcel@...tmann.org, linux-bluetooth@...r.kernel.org
Cc:     chromeos-bluetooth-upstreaming@...omium.org,
        Daniel Winkler <danielwinkler@...gle.com>,
        Miao-chen Chou <mcchou@...omium.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        Luiz Augusto von Dentz <luiz.dentz@...il.com>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH 1/2] Bluetooth: Use ext adv handle from requests in CCs

Some extended advertising hci command complete events are still using
hdev->cur_adv_instance to map the request to the correct advertisement
handle. However, with extended advertising, "current instance" doesn't
make sense as we can have multiple concurrent advertisements. This
change switches these command complete handlers to use the advertising
handle from the request/event, to ensure we will always use the correct
advertising handle regardless of the state of hdev->cur_adv_instance.

This change is tested on hatch and kefka chromebooks and run through
single- and multi-advertising automated tests to confirm callbacks
report tx power to the correct advertising handle, etc.

Reviewed-by: Miao-chen Chou <mcchou@...omium.org>
Signed-off-by: Daniel Winkler <danielwinkler@...gle.com>
---

 net/bluetooth/hci_event.c | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 593eafa282e31a..016b2999f21957 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -1212,12 +1212,11 @@ static void hci_cc_le_set_adv_set_random_addr(struct hci_dev *hdev,
 
 	hci_dev_lock(hdev);
 
-	if (!hdev->cur_adv_instance) {
+	if (!cp->handle) {
 		/* Store in hdev for instance 0 (Set adv and Directed advs) */
 		bacpy(&hdev->random_addr, &cp->bdaddr);
 	} else {
-		adv_instance = hci_find_adv_instance(hdev,
-						     hdev->cur_adv_instance);
+		adv_instance = hci_find_adv_instance(hdev, cp->handle);
 		if (adv_instance)
 			bacpy(&adv_instance->random_addr, &cp->bdaddr);
 	}
@@ -1778,17 +1777,16 @@ static void hci_cc_set_ext_adv_param(struct hci_dev *hdev, struct sk_buff *skb)
 
 	hci_dev_lock(hdev);
 	hdev->adv_addr_type = cp->own_addr_type;
-	if (!hdev->cur_adv_instance) {
+	if (!cp->handle) {
 		/* Store in hdev for instance 0 */
 		hdev->adv_tx_power = rp->tx_power;
 	} else {
-		adv_instance = hci_find_adv_instance(hdev,
-						     hdev->cur_adv_instance);
+		adv_instance = hci_find_adv_instance(hdev, cp->handle);
 		if (adv_instance)
 			adv_instance->tx_power = rp->tx_power;
 	}
 	/* Update adv data as tx power is known now */
-	hci_req_update_adv_data(hdev, hdev->cur_adv_instance);
+	hci_req_update_adv_data(hdev, cp->handle);
 
 	hci_dev_unlock(hdev);
 }
@@ -5308,12 +5306,12 @@ static void hci_le_ext_adv_term_evt(struct hci_dev *hdev, struct sk_buff *skb)
 		if (hdev->adv_addr_type != ADDR_LE_DEV_RANDOM)
 			return;
 
-		if (!hdev->cur_adv_instance) {
+		if (!ev->handle) {
 			bacpy(&conn->resp_addr, &hdev->random_addr);
 			return;
 		}
 
-		adv_instance = hci_find_adv_instance(hdev, hdev->cur_adv_instance);
+		adv_instance = hci_find_adv_instance(hdev, ev->handle);
 		if (adv_instance)
 			bacpy(&conn->resp_addr, &adv_instance->random_addr);
 	}
-- 
2.31.0.208.g409f899ff0-goog