diff options
Diffstat (limited to 'drivers/net/mctp/mctp-i2c.c')
| -rw-r--r-- | drivers/net/mctp/mctp-i2c.c | 47 |
1 files changed, 32 insertions, 15 deletions
diff --git a/drivers/net/mctp/mctp-i2c.c b/drivers/net/mctp/mctp-i2c.c index 0762c735dd8a..1d67a3ca1fd1 100644 --- a/drivers/net/mctp/mctp-i2c.c +++ b/drivers/net/mctp/mctp-i2c.c @@ -43,6 +43,7 @@ enum { MCTP_I2C_FLOW_STATE_NEW = 0, MCTP_I2C_FLOW_STATE_ACTIVE, + MCTP_I2C_FLOW_STATE_INVALID, }; /* List of all struct mctp_i2c_client @@ -374,12 +375,18 @@ mctp_i2c_get_tx_flow_state(struct mctp_i2c_dev *midev, struct sk_buff *skb) */ if (!key->valid) { state = MCTP_I2C_TX_FLOW_INVALID; - - } else if (key->dev_flow_state == MCTP_I2C_FLOW_STATE_NEW) { - key->dev_flow_state = MCTP_I2C_FLOW_STATE_ACTIVE; - state = MCTP_I2C_TX_FLOW_NEW; } else { - state = MCTP_I2C_TX_FLOW_EXISTING; + switch (key->dev_flow_state) { + case MCTP_I2C_FLOW_STATE_NEW: + key->dev_flow_state = MCTP_I2C_FLOW_STATE_ACTIVE; + state = MCTP_I2C_TX_FLOW_NEW; + break; + case MCTP_I2C_FLOW_STATE_ACTIVE: + state = MCTP_I2C_TX_FLOW_EXISTING; + break; + default: + state = MCTP_I2C_TX_FLOW_INVALID; + } } spin_unlock_irqrestore(&key->lock, flags); @@ -617,21 +624,31 @@ static void mctp_i2c_release_flow(struct mctp_dev *mdev, { struct mctp_i2c_dev *midev = netdev_priv(mdev->dev); + bool queue_release = false; unsigned long flags; spin_lock_irqsave(&midev->lock, flags); - midev->release_count++; - spin_unlock_irqrestore(&midev->lock, flags); - - /* Ensure we have a release operation queued, through the fake - * marker skb + /* if we have seen the flow/key previously, we need to pair the + * original lock with a release */ - spin_lock(&midev->tx_queue.lock); - if (!midev->unlock_marker.next) - __skb_queue_tail(&midev->tx_queue, &midev->unlock_marker); - spin_unlock(&midev->tx_queue.lock); + if (key->dev_flow_state == MCTP_I2C_FLOW_STATE_ACTIVE) { + midev->release_count++; + queue_release = true; + } + key->dev_flow_state = MCTP_I2C_FLOW_STATE_INVALID; + spin_unlock_irqrestore(&midev->lock, flags); - wake_up(&midev->tx_wq); + if (queue_release) { + /* Ensure we have a release operation queued, through the fake + * marker skb + */ + spin_lock(&midev->tx_queue.lock); + if (!midev->unlock_marker.next) + __skb_queue_tail(&midev->tx_queue, + &midev->unlock_marker); + spin_unlock(&midev->tx_queue.lock); + wake_up(&midev->tx_wq); + } } static const struct net_device_ops mctp_i2c_ops = { |