diff mbox series

[v3] Bluetooth: Skip eSCO 2M params when not supported

Message ID 20210129135322.v3.1.I7d3819e3c406b20307a56fe96159e8f842f72d89@changeid (mailing list archive)
State Awaiting Upstream
Delegated to: Netdev Maintainers
Headers show
Series [v3] Bluetooth: Skip eSCO 2M params when not supported | expand

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Context Check Description
netdev/cover_letter success Link
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netdev/tree_selection success Guessed tree name to be net-next
netdev/subject_prefix warning Target tree name not specified in the subject
netdev/cc_maintainers warning 1 maintainers not CCed: luiz.dentz@gmail.com
netdev/source_inline success Was 0 now: 0
netdev/verify_signedoff success Link
netdev/module_param success Was 0 now: 0
netdev/build_32bit success Errors and warnings before: 32 this patch: 32
netdev/kdoc success Errors and warnings before: 0 this patch: 0
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netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 44 lines checked
netdev/build_allmodconfig_warn success Errors and warnings before: 32 this patch: 32
netdev/header_inline success Link
netdev/stable success Stable not CCed

Commit Message

Yu Liu Jan. 29, 2021, 9:53 p.m. UTC 
If a peer device doesn't support eSCO 2M we should skip the params that
use it when setting up sync connection since they will always fail.

Signed-off-by: Yu Liu <yudiliu@google.com>
Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
---

Changes in v3:
- Use pkt_type instead of adding new field

Changes in v2:
- Fix title

Changes in v1:
- Initial change

 include/net/bluetooth/hci_core.h |  1 +
 net/bluetooth/hci_conn.c         | 20 ++++++++++++++++++--
 2 files changed, 19 insertions(+), 2 deletions(-)

Comments

Marcel Holtmann Feb. 1, 2021, 4:05 p.m. UTC | #1 
Hi Yu,

> If a peer device doesn't support eSCO 2M we should skip the params that
> use it when setting up sync connection since they will always fail.
> 
> Signed-off-by: Yu Liu <yudiliu@google.com>
> Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
> ---
> 
> Changes in v3:
> - Use pkt_type instead of adding new field
> 
> Changes in v2:
> - Fix title
> 
> Changes in v1:
> - Initial change
> 
> include/net/bluetooth/hci_core.h |  1 +
> net/bluetooth/hci_conn.c         | 20 ++++++++++++++++++--
> 2 files changed, 19 insertions(+), 2 deletions(-)

patch has been applied to bluetooth-next tree.

Regards

Marcel
diff mbox series

Patch

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 239ab72f16c6e..71468a9ea798a 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1237,6 +1237,7 @@  void hci_conn_del_sysfs(struct hci_conn *conn);
 #define lmp_le_capable(dev)        ((dev)->features[0][4] & LMP_LE)
 #define lmp_sniffsubr_capable(dev) ((dev)->features[0][5] & LMP_SNIFF_SUBR)
 #define lmp_pause_enc_capable(dev) ((dev)->features[0][5] & LMP_PAUSE_ENC)
+#define lmp_esco_2m_capable(dev)   ((dev)->features[0][5] & LMP_EDR_ESCO_2M)
 #define lmp_ext_inq_capable(dev)   ((dev)->features[0][6] & LMP_EXT_INQ)
 #define lmp_le_br_capable(dev)     (!!((dev)->features[0][6] & LMP_SIMUL_LE_BR))
 #define lmp_ssp_capable(dev)       ((dev)->features[0][6] & LMP_SIMPLE_PAIR)
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 07c34c55fc508..357ce0cfbc5c9 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -278,6 +278,20 @@  static void hci_add_sco(struct hci_conn *conn, __u16 handle)
 	hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp);
 }
 
+static bool find_next_esco_param(struct hci_conn *conn,
+				 const struct sco_param *esco_param, int size)
+{
+	for (; conn->attempt <= size; conn->attempt++) {
+		if (lmp_esco_2m_capable(conn->link) ||
+		    (esco_param[conn->attempt - 1].pkt_type & ESCO_2EV3))
+			break;
+		BT_DBG("hcon %p skipped attempt %d, eSCO 2M not supported",
+		       conn, conn->attempt);
+	}
+
+	return conn->attempt <= size;
+}
+
 bool hci_setup_sync(struct hci_conn *conn, __u16 handle)
 {
 	struct hci_dev *hdev = conn->hdev;
@@ -299,13 +313,15 @@  bool hci_setup_sync(struct hci_conn *conn, __u16 handle)
 
 	switch (conn->setting & SCO_AIRMODE_MASK) {
 	case SCO_AIRMODE_TRANSP:
-		if (conn->attempt > ARRAY_SIZE(esco_param_msbc))
+		if (!find_next_esco_param(conn, esco_param_msbc,
+					  ARRAY_SIZE(esco_param_msbc)))
 			return false;
 		param = &esco_param_msbc[conn->attempt - 1];
 		break;
 	case SCO_AIRMODE_CVSD:
 		if (lmp_esco_capable(conn->link)) {
-			if (conn->attempt > ARRAY_SIZE(esco_param_cvsd))
+			if (!find_next_esco_param(conn, esco_param_cvsd,
+						  ARRAY_SIZE(esco_param_cvsd)))
 				return false;
 			param = &esco_param_cvsd[conn->attempt - 1];
 		} else {