diff options
| author | Chin-Ran Lo <crlo@marvell.com> | 2014-07-02 01:00:14 +0400 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2014-07-03 19:42:54 +0400 |
| commit | 396e04f4bb9afefb0744715dc76d9abe18ee5fb0 (patch) | |
| tree | 0492fff5438d6a4b094489e8faa4536cb5d46689 | |
| parent | 4df82b5911c0e380d8b308958f158c3e7b365467 (diff) | |
| download | linux-396e04f4bb9afefb0744715dc76d9abe18ee5fb0.tar.xz | |
Bluetooth: btmrvl: wait for HOST_SLEEP_ENABLE event in suspend
After BT_CMD_HOST_SLEEP_ENABLE command finishes, driver should
wait until getting BT_EVENT_HOST_SLEEP_ENABLE event to complete
suspend procedure.
Without this patch the suspend handler would return success
earlier. By the time when the BT_EVENT_HOST_SLEEP_ENABLE event
comes in the controller driver could have already turned off the
bus clock. This causes kernel crash or system reboot eventually.
Cc: <stable@vger.kernel.org> # 3.13+
Signed-off-by: Chin-Ran Lo <crlo@marvell.com>
Signed-off-by: Jeff CF Chen <jeffc@marvell.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
| -rw-r--r-- | drivers/bluetooth/btmrvl_drv.h | 1 | ||||
| -rw-r--r-- | drivers/bluetooth/btmrvl_main.c | 25 |
2 files changed, 25 insertions, 1 deletions
diff --git a/drivers/bluetooth/btmrvl_drv.h b/drivers/bluetooth/btmrvl_drv.h index 4c313e73df83..a8a9d3380e59 100644 --- a/drivers/bluetooth/btmrvl_drv.h +++ b/drivers/bluetooth/btmrvl_drv.h @@ -68,6 +68,7 @@ struct btmrvl_adapter { u8 hs_state; u8 wakeup_tries; wait_queue_head_t cmd_wait_q; + wait_queue_head_t event_hs_wait_q; u8 cmd_complete; bool is_suspended; }; diff --git a/drivers/bluetooth/btmrvl_main.c b/drivers/bluetooth/btmrvl_main.c index d35f2e189a6d..cc65fd2fe856 100644 --- a/drivers/bluetooth/btmrvl_main.c +++ b/drivers/bluetooth/btmrvl_main.c @@ -114,6 +114,7 @@ int btmrvl_process_event(struct btmrvl_private *priv, struct sk_buff *skb) adapter->hs_state = HS_ACTIVATED; if (adapter->psmode) adapter->ps_state = PS_SLEEP; + wake_up_interruptible(&adapter->event_hs_wait_q); BT_DBG("HS ACTIVATED!"); } else { BT_DBG("HS Enable failed"); @@ -270,11 +271,31 @@ EXPORT_SYMBOL_GPL(btmrvl_enable_ps); int btmrvl_enable_hs(struct btmrvl_private *priv) { + struct btmrvl_adapter *adapter = priv->adapter; int ret; ret = btmrvl_send_sync_cmd(priv, BT_CMD_HOST_SLEEP_ENABLE, NULL, 0); - if (ret) + if (ret) { BT_ERR("Host sleep enable command failed\n"); + return ret; + } + + ret = wait_event_interruptible_timeout(adapter->event_hs_wait_q, + adapter->hs_state, + msecs_to_jiffies(WAIT_UNTIL_HS_STATE_CHANGED)); + if (ret < 0) { + BT_ERR("event_hs_wait_q terminated (%d): %d,%d,%d", + ret, adapter->hs_state, adapter->ps_state, + adapter->wakeup_tries); + } else if (!ret) { + BT_ERR("hs_enable timeout: %d,%d,%d", adapter->hs_state, + adapter->ps_state, adapter->wakeup_tries); + ret = -ETIMEDOUT; + } else { + BT_DBG("host sleep enabled: %d,%d,%d", adapter->hs_state, + adapter->ps_state, adapter->wakeup_tries); + ret = 0; + } return ret; } @@ -375,6 +396,7 @@ static void btmrvl_init_adapter(struct btmrvl_private *priv) } init_waitqueue_head(&priv->adapter->cmd_wait_q); + init_waitqueue_head(&priv->adapter->event_hs_wait_q); } static void btmrvl_free_adapter(struct btmrvl_private *priv) @@ -685,6 +707,7 @@ int btmrvl_remove_card(struct btmrvl_private *priv) hdev = priv->btmrvl_dev.hcidev; wake_up_interruptible(&priv->adapter->cmd_wait_q); + wake_up_interruptible(&priv->adapter->event_hs_wait_q); kthread_stop(priv->main_thread.task); |