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Bluetooth: Use proper timer for hci command timout 

Use proper timer instead of hci command flow control to timeout
failed hci commands. Otherwise stack ends up sending commands
when flow control is used to block new commands.

2010-09-01 18:29:41.592132 < HCI Command: Remote Name Request (0x01|0x0019) plen 10
    bdaddr 00:16:CF:E1:C7:D7 mode 2 clkoffset 0x0000
2010-09-01 18:29:41.592681 > HCI Event: Command Status (0x0f) plen 4
    Remote Name Request (0x01|0x0019) status 0x00 ncmd 0
2010-09-01 18:29:51.022033 < HCI Command: Remote Name Request Cancel (0x01|0x001a) plen 6
    bdaddr 00:16:CF:E1:C7:D7

Signed-off-by: Ville Tervo <ville.tervo@nokia.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
This commit is contained in:
Ville Tervo 2011-02-16 16:32:41 +02:00 committed by Gustavo F. Padovan
parent 7f4b2b04c8
commit 6bd32326cd
4 changed files with 26 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/net/bluetooth/hci.h
View File

@ -119,6 +119,7 @@ enum {
#define HCI_PAIRING_TIMEOUT (60000) /* 60 seconds */
#define HCI_IDLE_TIMEOUT (6000) /* 6 seconds */
#define HCI_INIT_TIMEOUT (10000) /* 10 seconds */
#define HCI_CMD_TIMEOUT (1000) /* 1 seconds */
/* HCI data types */
#define HCI_COMMAND_PKT 0x01
@ -244,6 +245,8 @@ enum {
#define HCI_AT_GENERAL_BONDING_MITM 0x05
/* ----- HCI Commands ---- */
#define HCI_OP_NOP 0x0000
#define HCI_OP_INQUIRY 0x0401
struct hci_cp_inquiry {
__u8 lap[3];

2
include/net/bluetooth/hci_core.h
View File

@ -132,7 +132,6 @@ struct hci_dev {
unsigned int sco_pkts;
unsigned int le_pkts;
unsigned long cmd_last_tx;
unsigned long acl_last_tx;
unsigned long sco_last_tx;
unsigned long le_last_tx;
@ -143,6 +142,7 @@ struct hci_dev {
struct work_struct power_off;
struct timer_list off_timer;
struct timer_list cmd_timer;
struct tasklet_struct cmd_task;
struct tasklet_struct rx_task;
struct tasklet_struct tx_task;

22
net/bluetooth/hci_core.c
View File

@ -41,6 +41,7 @@
#include <linux/interrupt.h>
#include <linux/notifier.h>
#include <linux/rfkill.h>
#include <linux/timer.h>
#include <net/sock.h>
#include <asm/system.h>
@ -623,6 +624,7 @@ static int hci_dev_do_close(struct hci_dev *hdev)
/* Drop last sent command */
if (hdev->sent_cmd) {
del_timer_sync(&hdev->cmd_timer);
kfree_skb(hdev->sent_cmd);
hdev->sent_cmd = NULL;
}
@ -1066,6 +1068,16 @@ int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
return 0;
}
/* HCI command timer function */
static void hci_cmd_timer(unsigned long arg)
{
struct hci_dev *hdev = (void *) arg;
BT_ERR("%s command tx timeout", hdev->name);
atomic_set(&hdev->cmd_cnt, 1);
tasklet_schedule(&hdev->cmd_task);
}
/* Register HCI device */
int hci_register_dev(struct hci_dev *hdev)
{
@ -1112,6 +1124,8 @@ int hci_register_dev(struct hci_dev *hdev)
skb_queue_head_init(&hdev->cmd_q);
skb_queue_head_init(&hdev->raw_q);
setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev);
for (i = 0; i < NUM_REASSEMBLY; i++)
hdev->reassembly[i] = NULL;
@ -2004,11 +2018,6 @@ static void hci_cmd_task(unsigned long arg)
BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
if (!atomic_read(&hdev->cmd_cnt) && time_after(jiffies, hdev->cmd_last_tx + HZ)) {
BT_ERR("%s command tx timeout", hdev->name);
atomic_set(&hdev->cmd_cnt, 1);
}
/* Send queued commands */
if (atomic_read(&hdev->cmd_cnt)) {
skb = skb_dequeue(&hdev->cmd_q);
@ -2021,7 +2030,8 @@ static void hci_cmd_task(unsigned long arg)
if (hdev->sent_cmd) {
atomic_dec(&hdev->cmd_cnt);
hci_send_frame(skb);
hdev->cmd_last_tx = jiffies;
mod_timer(&hdev->cmd_timer,
jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT));
} else {
skb_queue_head(&hdev->cmd_q, skb);
tasklet_schedule(&hdev->cmd_task);

6
net/bluetooth/hci_event.c
View File

@ -1732,6 +1732,9 @@ static inline void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *sk
break;
}
if (ev->opcode != HCI_OP_NOP)
del_timer(&hdev->cmd_timer);
if (ev->ncmd) {
atomic_set(&hdev->cmd_cnt, 1);
if (!skb_queue_empty(&hdev->cmd_q))
@ -1807,6 +1810,9 @@ static inline void hci_cmd_status_evt(struct hci_dev *hdev, struct sk_buff *skb)
break;
}
if (ev->opcode != HCI_OP_NOP)
del_timer(&hdev->cmd_timer);
if (ev->ncmd) {
atomic_set(&hdev->cmd_cnt, 1);
if (!skb_queue_empty(&hdev->cmd_q))