user/sven/linux.git/net/caif/caif_dev.c, branch v3.3.4

net caif: Register properly as a pernet subsystem.

2012-01-28T02:06:03Z

caif is a subsystem and as such it needs to register with register_pernet_subsys instead of register_pernet_device. Among other problems using register_pernet_device was resulting in net_generic being called before the caif_net structure was allocated. Which has been causing net_generic to fail with either BUG_ON's or by return NULL pointers. A more ugly problem that could be caused is packets in flight why the subsystem is shutting down. To remove confusion also remove the cruft cause by inappropriately trying to fix this bug. With the aid of the previous patch I have tested this patch and confirmed that using register_pernet_subsys makes the failure go away as it should. Signed-off-by: Eric W. Biederman Acked-by: Sjur Brændeland Tested-by: Sasha Levin Signed-off-by: David S. Miller

caif: Remove bad WARN_ON in caif_dev

2012-01-17T15:46:55Z

Remove WARN_ON and bad handling of SKB without destructor callback in caif_flow_cb. SKB without destructor cannot be handled as an error case. Signed-off-by: Sjur Brændeland Signed-off-by: David S. Miller

Merge branch 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu

2012-01-09T21:08:28Z

* 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: percpu: Remove irqsafe_cpu_xxx variants Fix up conflict in arch/x86/include/asm/percpu.h due to clash with cebef5beed3d ("x86: Fix and improve percpu_cmpxchg{8,16}b_double()") which edited the (now removed) irqsafe_cpu_cmpxchg*_double code.

percpu: Remove irqsafe_cpu_xxx variants

2011-12-22T18:40:20Z

We simply say that regular this_cpu use must be safe regardless of preemption and interrupt state. That has no material change for x86 and s390 implementations of this_cpu operations. However, arches that do not provide their own implementation for this_cpu operations will now get code generated that disables interrupts instead of preemption. -tj: This is part of on-going percpu API cleanup. For detailed discussion of the subject, please refer to the following thread. http://thread.gmane.org/gmane.linux.kernel/1222078 Signed-off-by: Christoph Lameter Signed-off-by: Tejun Heo LKML-Reference:

caif: Replace BUG_ON with WARN_ON.

2011-12-06T22:21:47Z

BUG_ON is too strict in a number of circumstances, use WARN_ON instead. Protocol errors should not halt the system. Signed-off-by: Sjur Brændeland Signed-off-by: David S. Miller

caif: Stash away hijacked skb destructor and call it later

2011-12-05T23:27:56Z

This patch adds functionality for avoiding orphaning SKB too early. The original skb is stashed away and the original destructor is called from the hi-jacked flow-on callback. If CAIF interface goes down and a hi-jacked SKB exists, the original skb->destructor is restored. Signed-off-by: Sjur Brændeland Signed-off-by: David S. Miller

caif: Add support for flow-control on device's tx-queue

2011-12-05T23:27:56Z

Flow control is implemented by inspecting the qdisc queue length in order to detect potential overflow on the TX queue. When a threshold is reached flow-off is sent upwards in the CAIF stack. At the same time the skb->destructor is hi-jacked by orphaning the SKB and the original destructor is replaced with a "flow-on" callback. When the "hi-jacked" SKB is consumed the queue should be empty, and the "flow-on" callback is called and xon is sent upwards in the CAIF stack. Signed-off-by: Sjur Brændeland Signed-off-by: David S. Miller

caif: Add support for CAIF over CDC NCM USB interface

2011-12-05T23:27:56Z

NCM 1.0 does not support anything but Ethernet framing, hence CAIF payload will be put into Ethernet frames. Discovery is based on fixed USB vendor 0x04cc (ST-Ericsson), product-id 0x230f (NCM). In this variant only CAIF payload is sent over the NCM interface. The CAIF stack (cfusbl.c) will when USB interface register first check if we got a CDC NCM USB interface with the right VID, PID. It will then read the device's Ethernet address and create a 'template' Ethernet TX header, using a broadcast address as the destination address, and EthType 0x88b5 (802.1 Local Experimental - vendor specific). A protocol handler for 0x88b5 is setup for reception of CAIF frames from the CDC NCM USB interface. Signed-off-by: Sjur Brændeland Signed-off-by: David S. Miller

caif: Remove unused enum and parameter in cfserl

2011-12-01T04:30:48Z

Remove unused enum cfcnfg_phy_type and the parameter to cfserl_create. Signed-off-by: Sjur Brændeland Signed-off-by: David S. Miller

caif: Restructure how link caif link layer enroll

2011-12-01T04:30:48Z

Enrolling CAIF link layers are refactored. Signed-off-by: Sjur Brændeland Signed-off-by: David S. Miller