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From:   Alain Michaud <alainm@chromium.org>
To:     linux-bluetooth@vger.kernel.org
Cc:     Alain Michaud <alainm@chromium.org>,
        Abhishek Pandit-Subedi <abhishekpandit@chromium.org>,
        Daniel Winkler <danielwinkler@google.com>
Subject: [PATCH v3] Bluetooth: use configured params for ext adv
Date:   Mon, 22 Jun 2020 13:30:28 +0000
Message-Id: <20200622133028.26882-1-alainm@chromium.org>
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Sender: linux-bluetooth-owner@vger.kernel.org
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When the extended advertisement feature is enabled, a hardcoded min and
max interval of 0x8000 is used.  This patch fixes this issue by using
the configured min/max value.

This was validated by setting min/max in main.conf and making sure the
right setting is applied:

< HCI Command: LE Set Extended Advertising Parameters (0x08|0x0036) plen
25                                          #93 [hci0] 10.953011
…
Min advertising interval: 181.250 msec (0x0122)
Max advertising interval: 181.250 msec (0x0122)
…

Signed-off-by: Alain Michaud <alainm@chromium.org>
Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Reviewed-by: Daniel Winkler <danielwinkler@google.com>

---

Changes in v3:
-adding 3 octet comment back per Marcel's suggestion

Changes in v2:
-fix commit title and typo in description.
-Moved le24 convertion to  hci_cpu_to_le24

 include/net/bluetooth/hci.h | 8 ++++++++
 net/bluetooth/hci_request.c | 7 +++----
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 16ab6ce87883..1f18f71363e9 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -2516,4 +2516,12 @@ static inline struct hci_sco_hdr *hci_sco_hdr(const struct sk_buff *skb)
 #define hci_iso_data_len(h)		((h) & 0x3fff)
 #define hci_iso_data_flags(h)		((h) >> 14)
 
+/* le24 support */
+static inline void hci_cpu_to_le24(__u32 val, __u8 dst[3])
+{
+	dst[0] = val & 0xff;
+	dst[1] = (val & 0xff00) >> 8;
+	dst[2] = (val & 0xff0000) >> 16;
+}
+
 #endif /* __HCI_H */
diff --git a/net/bluetooth/hci_request.c b/net/bluetooth/hci_request.c
index 29decd7e8051..86ae4b953a01 100644
--- a/net/bluetooth/hci_request.c
+++ b/net/bluetooth/hci_request.c
@@ -1799,8 +1799,6 @@ int __hci_req_setup_ext_adv_instance(struct hci_request *req, u8 instance)
 	int err;
 	struct adv_info *adv_instance;
 	bool secondary_adv;
-	/* In ext adv set param interval is 3 octets */
-	const u8 adv_interval[3] = { 0x00, 0x08, 0x00 };
 
 	if (instance > 0) {
 		adv_instance = hci_find_adv_instance(hdev, instance);
@@ -1833,8 +1831,9 @@ int __hci_req_setup_ext_adv_instance(struct hci_request *req, u8 instance)
 
 	memset(&cp, 0, sizeof(cp));
 
-	memcpy(cp.min_interval, adv_interval, sizeof(cp.min_interval));
-	memcpy(cp.max_interval, adv_interval, sizeof(cp.max_interval));
+	/* In ext adv set param interval is 3 octets */
+	hci_cpu_to_le24(hdev->le_adv_min_interval, cp.min_interval);
+	hci_cpu_to_le24(hdev->le_adv_max_interval, cp.max_interval);
 
 	secondary_adv = (flags & MGMT_ADV_FLAG_SEC_MASK);
 
-- 
2.27.0.111.gc72c7da667-goog