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Bluetooth: Handle PM_SUSPEND_PREPARE and PM_POST_SUSPEND

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Register for PM_SUSPEND_PREPARE and PM_POST_SUSPEND to make sure the
Bluetooth controller is prepared correctly for suspend/resume. Implement
the registration, scheduling and task handling portions only in this
patch.

Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Abhishek Pandit-Subedi
2020-03-11 08:54:00 -07:00
committed by Marcel Holtmann
parent 72da7b2cca
commit 9952d90ea2
4 changed files with 126 additions and 0 deletions
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23
include/net/bluetooth/hci_core.h
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@@ -88,6 +88,20 @@ struct discovery_state {
unsigned long scan_duration;
};
#define SUSPEND_NOTIFIER_TIMEOUT msecs_to_jiffies(2000) /* 2 seconds */
enum suspend_tasks {
SUSPEND_POWERING_DOWN,
SUSPEND_PREPARE_NOTIFIER,
__SUSPEND_NUM_TASKS
};
enum suspended_state {
BT_RUNNING = 0,
BT_SUSPENDED,
};
struct hci_conn_hash {
struct list_head list;
unsigned int acl_num;
@@ -390,6 +404,15 @@ struct hci_dev {
void *smp_bredr_data;
struct discovery_state discovery;
struct notifier_block suspend_notifier;
struct work_struct suspend_prepare;
enum suspended_state suspend_state_next;
enum suspended_state suspend_state;
wait_queue_head_t suspend_wait_q;
DECLARE_BITMAP(suspend_tasks, __SUSPEND_NUM_TASKS);
struct hci_conn_hash conn_hash;
struct list_head mgmt_pending;