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authorFlorian Westphal <fw@strlen.de>2016-04-24 21:38:14 +0200
committerDavid S. Miller <davem@davemloft.net>2016-04-26 15:53:05 -0400
commitf0cdf76c103ffa34ca5ac87dcdef7edffc722cbf (patch)
tree893afe6a3b448bfeb0dd36cae35a6ce844230852 /Documentation/networking/netdevices.txt
parentdrivers: net: remove NETDEV_TX_LOCKED (diff)
downloadlinux-dev-f0cdf76c103ffa34ca5ac87dcdef7edffc722cbf.tar.xz
linux-dev-f0cdf76c103ffa34ca5ac87dcdef7edffc722cbf.zip
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 <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
-rw-r--r--Documentation/networking/netdevices.txt9
1 files changed, 3 insertions, 6 deletions
diff --git a/Documentation/networking/netdevices.txt b/Documentation/networking/netdevices.txt
index 0b1cf6b2a592..7fec2061a334 100644
--- a/Documentation/networking/netdevices.txt
+++ b/Documentation/networking/netdevices.txt
@@ -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.
ndo_tx_timeout:
Synchronization: netif_tx_lock spinlock; all TX queues frozen.