[PATCH 15/15] Bluetooth: hci_event: Use of a function table to handle Command Status

Luiz Augusto von Dentz
2021-12-01T00:04:28Z

This change the use of switch statement to a function table which is
easier to extend.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
---
net/bluetooth/hci_event.c | 152 +++++++++++++++-----------------------
1 file changed, 59 insertions(+), 93 deletions(-)

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 0b69d527ca4e..3f485d181eb6 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -2195,7 +2195,7 @@ static u8 hci_cc_write_ssp_debug_mode(struct hci_dev *hdev, void *data,

static void hci_cs_inquiry(struct hci_dev *hdev, __u8 status)
{
- BT_DBG("%s status 0x%2.2x", hdev->name, status);
+ bt_dev_dbg(hdev, "status 0x%2.2x", status);

if (status) {
hci_conn_check_pending(hdev);
@@ -2210,7 +2210,7 @@ static void hci_cs_create_conn(struct hci_dev *hdev, __u8 status)
struct hci_cp_create_conn *cp;
struct hci_conn *conn;

- BT_DBG("%s status 0x%2.2x", hdev->name, status);
+ bt_dev_dbg(hdev, "status 0x%2.2x", status);

cp = hci_sent_cmd_data(hdev, HCI_OP_CREATE_CONN);
if (!cp)
@@ -2220,7 +2220,7 @@ static void hci_cs_create_conn(struct hci_dev *hdev, __u8 status)

conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);

- BT_DBG("%s bdaddr %pMR hcon %p", hdev->name, &cp->bdaddr, conn);
+ bt_dev_dbg(hdev, "bdaddr %pMR hcon %p", &cp->bdaddr, conn);

if (status) {
if (conn && conn->state == BT_CONNECT) {
@@ -2249,7 +2249,7 @@ static void hci_cs_add_sco(struct hci_dev *hdev, __u8 status)
struct hci_conn *acl, *sco;
__u16 handle;

- BT_DBG("%s status 0x%2.2x", hdev->name, status);
+ bt_dev_dbg(hdev, "status 0x%2.2x", status);

if (!status)
return;
@@ -2260,7 +2260,7 @@ static void hci_cs_add_sco(struct hci_dev *hdev, __u8 status)

handle = __le16_to_cpu(cp->handle);

- BT_DBG("%s handle 0x%4.4x", hdev->name, handle);
+ bt_dev_dbg(hdev, "handle 0x%4.4x", handle);

hci_dev_lock(hdev);

@@ -2283,7 +2283,7 @@ static void hci_cs_auth_requested(struct hci_dev *hdev, __u8 status)
struct hci_cp_auth_requested *cp;
struct hci_conn *conn;

- BT_DBG("%s status 0x%2.2x", hdev->name, status);
+ bt_dev_dbg(hdev, "status 0x%2.2x", status);

if (!status)
return;
@@ -2310,7 +2310,7 @@ static void hci_cs_set_conn_encrypt(struct hci_dev *hdev, __u8 status)
struct hci_cp_set_conn_encrypt *cp;
struct hci_conn *conn;

- BT_DBG("%s status 0x%2.2x", hdev->name, status);
+ bt_dev_dbg(hdev, "status 0x%2.2x", status);

if (!status)
return;
@@ -2446,7 +2446,7 @@ static void hci_cs_remote_name_req(struct hci_dev *hdev, __u8 status)
struct hci_cp_remote_name_req *cp;
struct hci_conn *conn;

- BT_DBG("%s status 0x%2.2x", hdev->name, status);
+ bt_dev_dbg(hdev, "status 0x%2.2x", status);

/* If successful wait for the name req complete event before
* checking for the need to do authentication */
@@ -2489,7 +2489,7 @@ static void hci_cs_read_remote_features(struct hci_dev *hdev, __u8 status)
struct hci_cp_read_remote_features *cp;
struct hci_conn *conn;

- BT_DBG("%s status 0x%2.2x", hdev->name, status);
+ bt_dev_dbg(hdev, "status 0x%2.2x", status);

if (!status)
return;
@@ -2516,7 +2516,7 @@ static void hci_cs_read_remote_ext_features(struct hci_dev *hdev, __u8 status)
struct hci_cp_read_remote_ext_features *cp;
struct hci_conn *conn;

- BT_DBG("%s status 0x%2.2x", hdev->name, status);
+ bt_dev_dbg(hdev, "status 0x%2.2x", status);

if (!status)
return;
@@ -2544,7 +2544,7 @@ static void hci_cs_setup_sync_conn(struct hci_dev *hdev, __u8 status)
struct hci_conn *acl, *sco;
__u16 handle;

- BT_DBG("%s status 0x%2.2x", hdev->name, status);
+ bt_dev_dbg(hdev, "status 0x%2.2x", status);

if (!status)
return;
@@ -2555,7 +2555,7 @@ static void hci_cs_setup_sync_conn(struct hci_dev *hdev, __u8 status)

handle = __le16_to_cpu(cp->handle);

- BT_DBG("%s handle 0x%4.4x", hdev->name, handle);
+ bt_dev_dbg(hdev, "handle 0x%4.4x", handle);

hci_dev_lock(hdev);

@@ -2613,7 +2613,7 @@ static void hci_cs_sniff_mode(struct hci_dev *hdev, __u8 status)
struct hci_cp_sniff_mode *cp;
struct hci_conn *conn;

- BT_DBG("%s status 0x%2.2x", hdev->name, status);
+ bt_dev_dbg(hdev, "status 0x%2.2x", status);

if (!status)
return;
@@ -2640,7 +2640,7 @@ static void hci_cs_exit_sniff_mode(struct hci_dev *hdev, __u8 status)
struct hci_cp_exit_sniff_mode *cp;
struct hci_conn *conn;

- BT_DBG("%s status 0x%2.2x", hdev->name, status);
+ bt_dev_dbg(hdev, "status 0x%2.2x", status);

if (!status)
return;
@@ -2669,6 +2669,8 @@ static void hci_cs_disconnect(struct hci_dev *hdev, u8 status)
struct hci_conn *conn;
bool mgmt_conn;

+ bt_dev_dbg(hdev, "status 0x%2.2x", status);
+
/* Wait for HCI_EV_DISCONN_COMPLETE if status 0x00 and not suspended
* otherwise cleanup the connection immediately.
*/
@@ -2802,7 +2804,7 @@ static void hci_cs_le_create_conn(struct hci_dev *hdev, u8 status)
{
struct hci_cp_le_create_conn *cp;

- BT_DBG("%s status 0x%2.2x", hdev->name, status);
+ bt_dev_dbg(hdev, "status 0x%2.2x", status);

/* All connection failure handling is taken care of by the
* hci_le_conn_failed function which is triggered by the HCI
@@ -2827,7 +2829,7 @@ static void hci_cs_le_ext_create_conn(struct hci_dev *hdev, u8 status)
{
struct hci_cp_le_ext_create_conn *cp;

- BT_DBG("%s status 0x%2.2x", hdev->name, status);
+ bt_dev_dbg(hdev, "status 0x%2.2x", status);

/* All connection failure handling is taken care of by the
* hci_le_conn_failed function which is triggered by the HCI
@@ -2853,7 +2855,7 @@ static void hci_cs_le_read_remote_features(struct hci_dev *hdev, u8 status)
struct hci_cp_le_read_remote_features *cp;
struct hci_conn *conn;

- BT_DBG("%s status 0x%2.2x", hdev->name, status);
+ bt_dev_dbg(hdev, "status 0x%2.2x", status);

if (!status)
return;
@@ -2880,7 +2882,7 @@ static void hci_cs_le_start_enc(struct hci_dev *hdev, u8 status)
struct hci_cp_le_start_enc *cp;
struct hci_conn *conn;

- BT_DBG("%s status 0x%2.2x", hdev->name, status);
+ bt_dev_dbg(hdev, "status 0x%2.2x", status);

if (!status)
return;
@@ -3948,92 +3950,56 @@ static void hci_cmd_complete_evt(struct hci_dev *hdev, void *data,
queue_work(hdev->workqueue, &hdev->cmd_work);
}

+#define HCI_CS(_op, _func) \
+{ \
+ .op = _op, \
+ .func = _func, \
+}
+
+static const struct hci_cs {
+ u16 op;
+ void (*func)(struct hci_dev *hdev, __u8 status);
+} hci_cs_table[] = {
+ HCI_CS(HCI_OP_INQUIRY, hci_cs_inquiry),
+ HCI_CS(HCI_OP_CREATE_CONN, hci_cs_create_conn),
+ HCI_CS(HCI_OP_DISCONNECT, hci_cs_disconnect),
+ HCI_CS(HCI_OP_ADD_SCO, hci_cs_add_sco),
+ HCI_CS(HCI_OP_AUTH_REQUESTED, hci_cs_auth_requested),
+ HCI_CS(HCI_OP_SET_CONN_ENCRYPT, hci_cs_set_conn_encrypt),
+ HCI_CS(HCI_OP_REMOTE_NAME_REQ, hci_cs_remote_name_req),
+ HCI_CS(HCI_OP_READ_REMOTE_FEATURES, hci_cs_read_remote_features),
+ HCI_CS(HCI_OP_READ_REMOTE_EXT_FEATURES,
+ hci_cs_read_remote_ext_features),
+ HCI_CS(HCI_OP_SETUP_SYNC_CONN, hci_cs_setup_sync_conn),
+ HCI_CS(HCI_OP_ENHANCED_SETUP_SYNC_CONN,
+ hci_cs_enhanced_setup_sync_conn),
+ HCI_CS(HCI_OP_SNIFF_MODE, hci_cs_sniff_mode),
+ HCI_CS(HCI_OP_EXIT_SNIFF_MODE, hci_cs_exit_sniff_mode),
+ HCI_CS(HCI_OP_SWITCH_ROLE, hci_cs_switch_role),
+ HCI_CS(HCI_OP_LE_CREATE_CONN, hci_cs_le_create_conn),
+ HCI_CS(HCI_OP_LE_READ_REMOTE_FEATURES, hci_cs_le_read_remote_features),
+ HCI_CS(HCI_OP_LE_START_ENC, hci_cs_le_start_enc),
+ HCI_CS(HCI_OP_LE_EXT_CREATE_CONN, hci_cs_le_ext_create_conn)
+};
+
static void hci_cmd_status_evt(struct hci_dev *hdev, void *data,
struct sk_buff *skb, u16 *opcode, u8 *status,
hci_req_complete_t *req_complete,
hci_req_complete_skb_t *req_complete_skb)
{
struct hci_ev_cmd_status *ev = data;
+ int i;

*opcode = __le16_to_cpu(ev->opcode);
*status = ev->status;

- switch (*opcode) {
- case HCI_OP_INQUIRY:
- hci_cs_inquiry(hdev, ev->status);
- break;
-
- case HCI_OP_CREATE_CONN:
- hci_cs_create_conn(hdev, ev->status);
- break;
-
- case HCI_OP_DISCONNECT:
- hci_cs_disconnect(hdev, ev->status);
- break;
-
- case HCI_OP_ADD_SCO:
- hci_cs_add_sco(hdev, ev->status);
- break;
-
- case HCI_OP_AUTH_REQUESTED:
- hci_cs_auth_requested(hdev, ev->status);
- break;
-
- case HCI_OP_SET_CONN_ENCRYPT:
- hci_cs_set_conn_encrypt(hdev, ev->status);
- break;
-
- case HCI_OP_REMOTE_NAME_REQ:
- hci_cs_remote_name_req(hdev, ev->status);
- break;
-
- case HCI_OP_READ_REMOTE_FEATURES:
- hci_cs_read_remote_features(hdev, ev->status);
- break;
-
- case HCI_OP_READ_REMOTE_EXT_FEATURES:
- hci_cs_read_remote_ext_features(hdev, ev->status);
- break;
-
- case HCI_OP_SETUP_SYNC_CONN:
- hci_cs_setup_sync_conn(hdev, ev->status);
- break;
-
- case HCI_OP_ENHANCED_SETUP_SYNC_CONN:
- hci_cs_enhanced_setup_sync_conn(hdev, ev->status);
- break;
-
- case HCI_OP_SNIFF_MODE:
- hci_cs_sniff_mode(hdev, ev->status);
- break;
-
- case HCI_OP_EXIT_SNIFF_MODE:
- hci_cs_exit_sniff_mode(hdev, ev->status);
- break;
-
- case HCI_OP_SWITCH_ROLE:
- hci_cs_switch_role(hdev, ev->status);
- break;
-
- case HCI_OP_LE_CREATE_CONN:
- hci_cs_le_create_conn(hdev, ev->status);
- break;
-
- case HCI_OP_LE_READ_REMOTE_FEATURES:
- hci_cs_le_read_remote_features(hdev, ev->status);
- break;
-
- case HCI_OP_LE_START_ENC:
- hci_cs_le_start_enc(hdev, ev->status);
- break;
-
- case HCI_OP_LE_EXT_CREATE_CONN:
- hci_cs_le_ext_create_conn(hdev, ev->status);
- break;
+ bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode);

- default:
- BT_DBG("%s opcode 0x%4.4x", hdev->name, *opcode);
- break;
+ for (i = 0; i < ARRAY_SIZE(hci_cs_table); i++) {
+ if (hci_cs_table[i].op == *opcode) {
+ hci_cs_table[i].func(hdev, ev->status);
+ break;
+ }
}

handle_cmd_cnt_and_timer(hdev, ev->ncmd);
--
2.33.1