diff options
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/mei')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mei/main.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mei/main.c b/drivers/net/wireless/intel/iwlwifi/mei/main.c index 67dfb77fedf7..f1e0fe806a00 100644 --- a/drivers/net/wireless/intel/iwlwifi/mei/main.c +++ b/drivers/net/wireless/intel/iwlwifi/mei/main.c @@ -31,6 +31,11 @@ MODULE_LICENSE("GPL"); #define MEI_WLAN_UUID UUID_LE(0x13280904, 0x7792, 0x4fcb, \ 0xa1, 0xaa, 0x5e, 0x70, 0xcb, 0xb1, 0xe8, 0x65) +/* After CSME takes ownership, it won't release it for 60 seconds to avoid + * frequent ownership transitions. + */ +#define MEI_OWNERSHIP_RETAKE_TIMEOUT_MS msecs_to_jiffies(60000) + /* * Since iwlwifi calls iwlmei without any context, hold a pointer to the * mei_cl_device structure here. @@ -156,6 +161,8 @@ struct iwl_mei_filters { * accessed without the mutex. * @netdev_work: used to defer registering and unregistering of the netdev to * avoid taking the rtnl lock in the SAP messages handlers. + * @ownership_dwork: used to re-ask for NIC ownership after ownership was taken + * by CSME or when a previous ownership request failed. * @sap_seq_no: the sequence number for the SAP messages * @seq_no: the sequence number for the SAP messages * @dbgfs_dir: the debugfs dir entry @@ -179,6 +186,7 @@ struct iwl_mei { bool pldr_active; spinlock_t data_q_lock; struct work_struct netdev_work; + struct delayed_work ownership_dwork; atomic_t sap_seq_no; atomic_t seq_no; @@ -833,6 +841,8 @@ static void iwl_mei_handle_csme_taking_ownership(struct mei_cl_device *cldev, } else { iwl_mei_send_sap_msg(cldev, SAP_MSG_NOTIF_CSME_OWNERSHIP_CONFIRMED); + schedule_delayed_work(&mei->ownership_dwork, + MEI_OWNERSHIP_RETAKE_TIMEOUT_MS); } } @@ -1447,7 +1457,13 @@ int iwl_mei_get_ownership(void) ret = wait_event_timeout(mei->get_ownership_wq, mei->got_ownership, HZ / 2); - return (!ret) ? -ETIMEDOUT : 0; + if (!ret) { + schedule_delayed_work(&mei->ownership_dwork, + MEI_OWNERSHIP_RETAKE_TIMEOUT_MS); + return -ETIMEDOUT; + } + + return 0; out: mutex_unlock(&iwl_mei_mutex); return ret; @@ -1738,6 +1754,8 @@ void iwl_mei_device_state(bool up) iwl_mei_send_sap_msg(mei->cldev, SAP_MSG_NOTIF_CSME_OWNERSHIP_CONFIRMED); mei->csme_taking_ownership = false; + schedule_delayed_work(&mei->ownership_dwork, + MEI_OWNERSHIP_RETAKE_TIMEOUT_MS); out: mutex_unlock(&iwl_mei_mutex); } @@ -1894,6 +1912,11 @@ static void iwl_mei_dbgfs_unregister(struct iwl_mei *mei) {} #endif /* CONFIG_DEBUG_FS */ +static void iwl_mei_ownership_dwork(struct work_struct *wk) +{ + iwl_mei_get_ownership(); +} + #define ALLOC_SHARED_MEM_RETRY_MAX_NUM 3 /* @@ -1923,6 +1946,7 @@ static int iwl_mei_probe(struct mei_cl_device *cldev, init_waitqueue_head(&mei->pldr_wq); spin_lock_init(&mei->data_q_lock); INIT_WORK(&mei->netdev_work, iwl_mei_netdev_work); + INIT_DELAYED_WORK(&mei->ownership_dwork, iwl_mei_ownership_dwork); mei_cldev_set_drvdata(cldev, mei); mei->cldev = cldev; @@ -2105,6 +2129,7 @@ static void iwl_mei_remove(struct mei_cl_device *cldev) cancel_work_sync(&mei->send_csa_msg_wk); cancel_delayed_work_sync(&mei->csa_throttle_end_wk); cancel_work_sync(&mei->netdev_work); + cancel_delayed_work_sync(&mei->ownership_dwork); /* * If someone waits for the ownership, let him know that we are going |