From:   Luiz Augusto von Dentz <luiz.dentz@gmail.com>
To:     linux-bluetooth@vger.kernel.org
Subject: [RFC] Bluetooth: hci_event: Rework hci_inquiry_result_with_rssi_evt
Date:   Tue,  4 Jan 2022 13:00:51 -0800
Message-Id: <20220104210051.2982871-1-luiz.dentz@gmail.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
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From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

This rework the handling of hci_inquiry_result_with_rssi_evt to not use
a union to represent the different inquiry responses.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
---
 include/net/bluetooth/hci.h |  6 +-----
 net/bluetooth/hci_event.c   | 19 +++++++++----------
 2 files changed, 10 insertions(+), 15 deletions(-)

diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index e2b06bb79e2e..35c073d44ec5 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -2233,11 +2233,7 @@ struct inquiry_info_rssi_pscan {
 } __packed;
 struct hci_ev_inquiry_result_rssi {
 	__u8     num;
-	struct inquiry_info_rssi info[];
-} __packed;
-struct hci_ev_inquiry_result_rssi_pscan {
-	__u8     num;
-	struct inquiry_info_rssi_pscan info[];
+	__u8     data[];
 } __packed;
 
 #define HCI_EV_REMOTE_EXT_FEATURES	0x23
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index f1082b7c0218..fc30f4c03d29 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -4507,16 +4507,13 @@ static void hci_pscan_rep_mode_evt(struct hci_dev *hdev, void *data,
 static void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, void *edata,
 					     struct sk_buff *skb)
 {
-	union {
-		struct hci_ev_inquiry_result_rssi *res1;
-		struct hci_ev_inquiry_result_rssi_pscan *res2;
-	} *ev = edata;
+	struct hci_ev_inquiry_result_rssi *ev = edata;
 	struct inquiry_data data;
 	int i;
 
-	bt_dev_dbg(hdev, "num_rsp %d", ev->res1->num);
+	bt_dev_dbg(hdev, "num_rsp %d", ev->num);
 
-	if (!ev->res1->num)
+	if (!ev->num)
 		return;
 
 	if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
@@ -4524,10 +4521,11 @@ static void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, void *edata,
 
 	hci_dev_lock(hdev);
 
-	if (skb->len == flex_array_size(ev, res2->info, ev->res2->num)) {
+	if (skb->len == array_size(ev->num,
+				   sizeof(struct inquiry_info_rssi_pscan))) {
 		struct inquiry_info_rssi_pscan *info;
 
-		for (i = 0; i < ev->res2->num; i++) {
+		for (i = 0; i < ev->num; i++) {
 			u32 flags;
 
 			info = hci_ev_skb_pull(hdev, skb,
@@ -4554,10 +4552,11 @@ static void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, void *edata,
 					  info->dev_class, info->rssi,
 					  flags, NULL, 0, NULL, 0);
 		}
-	} else if (skb->len == flex_array_size(ev, res1->info, ev->res1->num)) {
+	} else if (skb->len == array_size(ev->num,
+					  sizeof(struct inquiry_info_rssi))) {
 		struct inquiry_info_rssi *info;
 
-		for (i = 0; i < ev->res1->num; i++) {
+		for (i = 0; i < ev->num; i++) {
 			u32 flags;
 
 			info = hci_ev_skb_pull(hdev, skb,
-- 
2.33.1