diff options
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mei/main.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mei/main.c b/drivers/net/wireless/intel/iwlwifi/mei/main.c index 9a49361cd059..b89989b6399a 100644 --- a/drivers/net/wireless/intel/iwlwifi/mei/main.c +++ b/drivers/net/wireless/intel/iwlwifi/mei/main.c @@ -1990,6 +1990,7 @@ free: } #define SEND_SAP_MAX_WAIT_ITERATION 10 +#define IWLMEI_DEVICE_DOWN_WAIT_ITERATION 50 static void iwl_mei_remove(struct mei_cl_device *cldev) { @@ -2000,8 +2001,26 @@ static void iwl_mei_remove(struct mei_cl_device *cldev) * We are being removed while the bus is active, it means we are * going to suspend/ shutdown, so the NIC will disappear. */ - if (mei_cldev_enabled(cldev) && iwl_mei_cache.ops) - iwl_mei_cache.ops->nic_stolen(iwl_mei_cache.priv); + if (mei_cldev_enabled(cldev) && iwl_mei_cache.ops) { + unsigned int iter = IWLMEI_DEVICE_DOWN_WAIT_ITERATION; + bool down = false; + + /* + * In case of suspend, wait for the mac to stop and don't remove + * the interface. This will allow the interface to come back + * on resume. + */ + while (!down && iter--) { + mdelay(1); + + mutex_lock(&iwl_mei_mutex); + down = mei->device_down; + mutex_unlock(&iwl_mei_mutex); + } + + if (!down) + iwl_mei_cache.ops->nic_stolen(iwl_mei_cache.priv); + } if (rcu_access_pointer(iwl_mei_cache.netdev)) { struct net_device *dev; |