|author||Florian Westphal <firstname.lastname@example.org>||2016-04-24 21:38:14 +0200|
|committer||David S. Miller <email@example.com>||2016-04-26 15:53:05 -0400|
|parent||drivers: net: remove NETDEV_TX_LOCKED (diff)|
net: remove NETDEV_TX_LOCKED support
No more users in the tree, remove NETDEV_TX_LOCKED support. Adds another hole in softnet_stats struct, but better than keeping the unused collision counter around. Signed-off-by: Florian Westphal <firstname.lastname@example.org> Signed-off-by: David S. Miller <email@example.com>
Diffstat (limited to '')
1 files changed, 3 insertions, 6 deletions
diff --git a/Documentation/networking/netdevices.txt b/Documentation/networking/netdevices.txt
index 0b1cf6b2a592..7fec2061a334 100644
@@ -69,10 +69,9 @@ ndo_start_xmit:
When the driver sets NETIF_F_LLTX in dev->features this will be
called without holding netif_tx_lock. In this case the driver
- has to lock by itself when needed. It is recommended to use a try lock
- for this and return NETDEV_TX_LOCKED when the spin lock fails.
- The locking there should also properly protect against
- set_rx_mode. Note that the use of NETIF_F_LLTX is deprecated.
+ has to lock by itself when needed.
+ The locking there should also properly protect against
+ set_rx_mode. WARNING: use of NETIF_F_LLTX is deprecated.
Don't use it for new drivers.
Context: Process with BHs disabled or BH (timer),
@@ -83,8 +82,6 @@ ndo_start_xmit:
o NETDEV_TX_BUSY Cannot transmit packet, try later
Usually a bug, means queue start/stop flow control is broken in
the driver. Note: the driver must NOT put the skb in its DMA ring.
- o NETDEV_TX_LOCKED Locking failed, please retry quickly.
- Only valid when NETIF_F_LLTX is set.
Synchronization: netif_tx_lock spinlock; all TX queues frozen.