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Converts the dtt200u DVB USB driver over to the rc-core
infrastructure for its handling of IR remotes. This device can receive
generic NEC / NEC Extended signals and the switch to the newer core
enables the easy use of tools such as ir-keytable to modify the active
key map.
Signed-off-by: Jonathan McDowell <noodles@earth.li>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Fix RC5 decoding with Fintek CIR chipset
Commit e87b540be2dd02552fb9244d50ae8b4e4619a34b tightened up the RC5
decoding by adding a check for trailing silence to ensure a valid RC5
command had been received. Unfortunately the trailer length checked was
10 units and the Fintek CIR device does not want to provide details of a
space longer than 6350us. This meant that RC5 remotes working on a
Fintek setup on 3.16 failed on 3.17 and later. Fix this by shortening
the trailer check to 6 units (allowing for a previous space in the
received remote command).
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=117221
Signed-off-by: Jonathan McDowell <noodles@earth.li>
Cc: stable@vger.kernel.org
Signed-off-by: David Härdeman <david@hardeman.nu>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Better organize the contents of the CEC part, moving the
introduction to chapter 1, placing all ioctls at chapter 2
and numerating all chapters and items.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Adding the header file is interesting for several reasons:
1) It makes MC documentation consistend with other parts;
2) The header file can be used as a quick index to all API
elements;
3) The cross-reference check helps to identify symbols that
aren't documented.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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* topic/cec:
[media] DocBook/media: add CEC documentation
[media] s5p_cec: get rid of an unused var
[media] move s5p-cec to staging
[media] vivid: add CEC emulation
[media] cec: s5p-cec: Add s5p-cec driver
[media] cec: adv7511: add cec support
[media] cec: adv7842: add cec support
[media] cec: adv7604: add cec support
[media] cec: add compat32 ioctl support
[media] cec/TODO: add TODO file so we know why this is still in staging
[media] cec: add HDMI CEC framework (api)
[media] cec: add HDMI CEC framework (adapter)
[media] cec: add HDMI CEC framework (core)
[media] cec-funcs.h: static inlines to pack/unpack CEC messages
[media] cec.h: add cec header
[media] cec-edid: add module for EDID CEC helper functions
[media] cec.txt: add CEC framework documentation
[media] rc: Add HDMI CEC protocol handling
Input: add HDMI CEC specific keycodes
Input: add BUS_CEC type
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Adding the header file is interesting for several reasons:
1) It makes MC documentation consistend with other parts;
2) The header file can be used as a quick index to all API
elements;
3) The cross-reference check helps to identify symbols that
aren't documented.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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The function that replace references add a "\ " at the end of
references, to avoid the ReST markup parser to not identify
them as references. That works fine except for the end of lines,
as a sequence of { '\', ' ', '\n' } characters makes Sphinx
to ignore the end of line. So, strip those escape/spaces at the
end of lines.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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cpufeatures.h currently defines X86_BUG(9) twice on 32-bit:
#define X86_BUG_NULL_SEG X86_BUG(9) /* Nulling a selector preserves the base */
...
#ifdef CONFIG_X86_32
#define X86_BUG_ESPFIX X86_BUG(9) /* "" IRET to 16-bit SS corrupts ESP/RSP high bits */
#endif
I think what happened was that this added the X86_BUG_ESPFIX, but
in an #ifdef below most of the bugs:
58a5aac53313 x86/entry/32: Introduce and use X86_BUG_ESPFIX instead of paravirt_enabled
Then this came along and added X86_BUG_NULL_SEG, but collided
with the earlier one that did the bug below the main block
defining all the X86_BUG()s.
7a5d67048745 x86/cpu: Probe the behavior of nulling out a segment at boot time
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Andy Lutomirski <luto@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave@sr71.net>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/20160618001503.CEE1B141@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Use mrfld as an abbreviation of Merrifield to be consistent with the rest of
the code.
In the future we are going to add more files here prefixed with 'mrfld'.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1466265094-146113-1-git-send-email-andriy.shevchenko@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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In current code, we can get cpuacct data from several files,
but each file has various limitations.
For example:
- We can get CPU usage in user and kernel mode via cpuacct.stat,
but we can't get detailed data about each CPU.
- We can get each CPU's kernel mode usage in cpuacct.usage_percpu_sys,
but we can't get user mode usage data at the same time.
This patch introduces cpuacct.usage_all, to show all detailed CPU
accounting data together:
# cat cpuacct.usage_all
cpu user system
0 3809760299 5807968992
1 3250329855 454612211
..
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/7744460969edd7caaf0e903592ee52353ed9bdd6.1466415271.git.zhaolei@cn.fujitsu.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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In cpuacct_stats_show() we currently we have copies of similar code,
for each cpustat(system/user) variant.
Use a loop instead to consolidate the code. This will also work better
if we extend the CPUACCT_STAT_NSTATS type.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/b0597d4224655e9f333f1a6224ed9654c7d7d36a.1466415271.git.zhaolei@cn.fujitsu.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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These two types have similar function, no need to separate them.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/436748885270d64363c7dc67167507d486c2057a.1466415271.git.zhaolei@cn.fujitsu.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Changesets:
eaa0b96bbb65 ("[media] media: Add video statistics computation functions")
and
1179aab13db3 ("[media] media: Add video processing entity functions")
added some new elements to the "media entity types" table at the
DocBook. We need to do the same at the reST version, in order to
keep it in sync with the DocBook version.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Implement memory barriers according to Documentation/circular-buffers.txt:
- use smp_store_release() to update ringbuffer read/write pointers
- use smp_load_acquire() to load write pointer on reader side
- use ACCESS_ONCE() to load read pointer on writer side
This fixes data stream corruptions observed e.g. on an ARM Cortex-A9
quad core system with different types (PCI, USB) of DVB tuners.
Signed-off-by: Soeren Moch <smoch@web.de>
Cc: stable@vger.kernel.org # 3.14+
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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mtk-vcodec/venc_vpu_if.c:40:30: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
struct venc_vpu_inst *vpu = (struct venc_vpu_inst *)msg->venc_inst;
^
Note: venc_inst is u64.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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The workqueue "work_thread" is involved in updating parameters for
transfers. It has a single work item(&sd->work) and hence
doesn't require ordering. Also, it is not being used on a memory
reclaim path. Hence, the singlethreaded workqueue has been replaced with
the use of system_wq.
System workqueues have been able to handle high level of concurrency
for a long time now and hence it's not required to have a singlethreaded
workqueue just to gain concurrency. Unlike a dedicated per-cpu workqueue
created with create_singlethread_workqueue(), system_wq allows multiple
work items to overlap executions even on the same CPU; however, a
per-cpu workqueue doesn't have any CPU locality or global ordering
guarantee unless the target CPU is explicitly specified and thus the
increase of local concurrency shouldn't make any difference.
Work item has been flushed in sd_stop0() to ensure that there are no
pending tasks while disconnecting the driver.
Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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mtk-vcodec/mtk_vcodec_enc.c: In function 'mtk_venc_worker':
mtk-vcodec/mtk_vcodec_enc.c:1030:43: warning: format '%lx' expects argument of type 'long unsigned int', but argument 7 has type 'size_t {aka unsigned int}' [-Wformat=]
mtk-vcodec/mtk_vcodec_enc.c:1030:43: warning: format '%lx' expects argument of type 'long unsigned int', but argument 10 has type 'size_t {aka unsigned int}' [-Wformat=]
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Signed-off-by: Ingo Molnar <mingo@kernel.org>
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When we introduced GSO support, if using auth the auth chunk was being
left queued on the packet even after the final segment was generated.
Later on sctp_transmit_packet it calls sctp_packet_reset, which zeroed
the packet len while not accounting for this left-over. This caused more
space to be used the next packet due to the chunk still being queued,
but space which wasn't allocated as its size wasn't accounted.
The fix is to only queue it back when we know that we are going to
generate another segment.
Fixes: 90017accff61 ("sctp: Add GSO support")
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This code generates as static checker warning because htons(ETH_P_IPV6)
is always true. From the context it looks like the && was intended to
be !=.
Fixes: 94758f8de037 ('bnxt_en: Add GRO logic for BCM5731X chips.')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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over time there were multiple requests to access different data
structures and fields of task_struct current, so finally add
the helper to access 'current' as-is. Tracing bpf programs will do
the rest of walking the pointers via bpf_probe_read().
Note that current can be null and bpf program has to deal it with,
but even dumb passing null into bpf_probe_read() is still safe.
Suggested-by: Brendan Gregg <brendan.d.gregg@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The routing table of every switch in a tree is currently initialized to
all zeros. This is an issue since 0 is a valid port number.
Add a DSA_RTABLE_NONE=-1 constant to initialize the signed values of the
routing table pointing to other switches.
This fixes the device mapping of the mv88e6xxx driver where the port
pointing to the switch itself and to non-existent switches was wrongly
configured to be 0. It is now set to the expected 0xf value.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The referenced change added a netlink notifier for processing
device queue size events. These events are fired for all devices
but the registered callback assumed they only occurred for tun
devices. This fix adds a check (borrowed from macvtap.c) to discard
non-tun device events.
For reference, this fixes the following splat:
[ 71.505935] BUG: unable to handle kernel NULL pointer dereference at 0000000000000010
[ 71.513870] IP: [<ffffffff8153c1a0>] tun_device_event+0x110/0x340
[ 71.519906] PGD 3f41f56067 PUD 3f264b7067 PMD 0
[ 71.524497] Oops: 0002 [#1] SMP DEBUG_PAGEALLOC
[ 71.529374] gsmi: Log Shutdown Reason 0x03
[ 71.533417] Modules linked in:[ 71.533826] mlx4_en: eth1: Link Up
[ 71.539616] bonding w1_therm wire cdc_acm ehci_pci ehci_hcd mlx4_en ib_uverbs mlx4_ib ib_core mlx4_core
[ 71.549282] CPU: 12 PID: 7915 Comm: set.ixion-haswe Not tainted 4.7.0-dbx-DEV #8
[ 71.556586] Hardware name: Intel Grantley,Wellsburg/Ixion_IT_15, BIOS 2.58.0 05/03/2016
[ 71.564495] task: ffff887f00bb20c0 ti: ffff887f00798000 task.ti: ffff887f00798000
[ 71.571894] RIP: 0010:[<ffffffff8153c1a0>] [<ffffffff8153c1a0>] tun_device_event+0x110/0x340
[ 71.580327] RSP: 0018:ffff887f0079bbd8 EFLAGS: 00010202
[ 71.585576] RAX: fffffffffffffae8 RBX: ffff887ef6d03378 RCX: 0000000000000000
[ 71.592624] RDX: 0000000000000000 RSI: 0000000000000028 RDI: 0000000000000000
[ 71.599675] RBP: ffff887f0079bc48 R08: 0000000000000000 R09: 0000000000000001
[ 71.606730] R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000010
[ 71.613780] R13: 0000000000000000 R14: 0000000000000001 R15: ffff887f0079bd00
[ 71.620832] FS: 00007f5cdc581700(0000) GS:ffff883f7f700000(0000) knlGS:0000000000000000
[ 71.628826] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 71.634500] CR2: 0000000000000010 CR3: 0000003f3eb62000 CR4: 00000000001406e0
[ 71.641549] Stack:
[ 71.643533] ffff887f0079bc08 0000000000000246 000000000000001e ffff887ef6d00000
[ 71.650871] ffff887f0079bd00 0000000000000000 0000000000000000 ffffffff00000000
[ 71.658210] ffff887f0079bc48 ffffffff81d24070 00000000fffffff9 ffffffff81cec7a0
[ 71.665549] Call Trace:
[ 71.667975] [<ffffffff810eeb0d>] notifier_call_chain+0x5d/0x80
[ 71.673823] [<ffffffff816365d0>] ? show_tx_maxrate+0x30/0x30
[ 71.679502] [<ffffffff810eeb3e>] __raw_notifier_call_chain+0xe/0x10
[ 71.685778] [<ffffffff810eeb56>] raw_notifier_call_chain+0x16/0x20
[ 71.691976] [<ffffffff8160eb30>] call_netdevice_notifiers_info+0x40/0x70
[ 71.698681] [<ffffffff8160ec36>] call_netdevice_notifiers+0x16/0x20
[ 71.704956] [<ffffffff81636636>] change_tx_queue_len+0x66/0x90
[ 71.710807] [<ffffffff816381ef>] netdev_store.isra.5+0xbf/0xd0
[ 71.716658] [<ffffffff81638350>] tx_queue_len_store+0x50/0x60
[ 71.722431] [<ffffffff814a6798>] dev_attr_store+0x18/0x30
[ 71.727857] [<ffffffff812ea3ff>] sysfs_kf_write+0x4f/0x70
[ 71.733274] [<ffffffff812e9507>] kernfs_fop_write+0x147/0x1d0
[ 71.739045] [<ffffffff81134a4f>] ? rcu_read_lock_sched_held+0x8f/0xa0
[ 71.745499] [<ffffffff8125a108>] __vfs_write+0x28/0x120
[ 71.750748] [<ffffffff8111b137>] ? percpu_down_read+0x57/0x90
[ 71.756516] [<ffffffff8125d7d8>] ? __sb_start_write+0xc8/0xe0
[ 71.762278] [<ffffffff8125d7d8>] ? __sb_start_write+0xc8/0xe0
[ 71.768038] [<ffffffff8125bd5e>] vfs_write+0xbe/0x1b0
[ 71.773113] [<ffffffff8125c092>] SyS_write+0x52/0xa0
[ 71.778110] [<ffffffff817528e5>] entry_SYSCALL_64_fastpath+0x18/0xa8
[ 71.784472] Code: 45 31 f6 48 8b 93 78 33 00 00 48 81 c3 78 33 00 00 48 39 d3 48 8d 82 e8 fa ff ff 74 25 48 8d b0 40 05 00 00 49 63 d6 41 83 c6 01 <49> 89 34 d4 48 8b 90 18 05 00 00 48 39 d3 48 8d 82 e8 fa ff ff
[ 71.803655] RIP [<ffffffff8153c1a0>] tun_device_event+0x110/0x340
[ 71.809769] RSP <ffff887f0079bbd8>
[ 71.813213] CR2: 0000000000000010
[ 71.816512] ---[ end trace 4db6449606319f73 ]---
Fixes: 1576d9860599 ("tun: switch to use skb array for tx")
Signed-off-by: Craig Gallek <kraig@google.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211
Johannes Berg says:
====================
Two more fixes:
* handle allocation failures in new(ish) A-MSDU decapsulation
* don't leak memory on nl80211 ACL parse errors
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
David Howells says:
====================
rxrpc: Improve conn/call lookup and fix call number generation [ver #3]
I've fixed a couple of patch descriptions and excised the patch that
duplicated the connections list for reconsideration at a later date.
For reference, the excised patch is sitting on the rxrpc-experimental
branch of my git tree, based on top of the rxrpc-rewrite branch. Diffing
it against yesterday's tag shows no differences.
Would you prefer the patch set to be emailed afresh instead of a git-pull
request?
David
---
Here's the next part of the AF_RXRPC rewrite. The two main purposes of
this set are to fix the call number handling and to make use of RCU when
looking up the connection or call to pass a received packet to.
Important changes in this set include:
(1) Avoidance of placing stack data into SG lists in rxkad so that kernel
stacks can become vmalloc'd (Herbert Xu).
(2) Calls cease pinning the connection they used as soon as possible,
which allows the connection to be discarded sooner and allows the call
channel on that connection to be reused earlier.
(3) Make each call channel on a connection have a separate and independent
call number space rather than having a shared number space for the
connection. Call numbers should increment monotonically per channel
on the client, and the server should ignore a call with a lower call
number for that channel than the latest it has seen. The RESPONSE
packet sets the minimum values of each call ID counter on a
connection.
(4) Look up calls by indexing the channel array on a connection rather
than by keeping calls in an rbtree on that connection. Also look up
calls using the channel array rather than using a hashtable.
The call hashtable can then be removed.
(5) Call terminal statuses are cached in the channel array for the last
call. It is assumed that if we the server have seen call N, then the
client no longer cares about call N-1 on the same channel.
This will allow retransmission of the terminal status in future
without the need to keep the rxrpc_call struct around.
(6) Peer lookups are moved out of common connection handling code and into
service connection handling code as client connections (a) must point
to a peer before they can be used and (b) are looked up by a
machine-unique connection ID directly, so we only need to look up the
peer first if we're going to deal with a service call.
(7) The reference count on a connection is held elevated by 1 whilst it is
alive (ie. idle unused connections have a refcount of 1). The reaper
will attempt to change the refcount from 1->0 and skip if this cannot
be done, whilst look ups only increment the refcount if it's non-zero.
This makes the implementation of RCU lookups easier as we don't have
to get a ref on the connection or a lock on the connection list to
prevent a connection being reaped whilst we're contemplating queueing
a packet that initiates a new service call upon it.
If we need to get a connection, but there's a dead connection in the
tree, we use rb_replace_node() to replace the dead one with a new one.
(8) Use a seqlock to validate the walk over the service connection rbtree
attached to a peer when it's being walked in RCU mode.
(9) Make the incoming call/connection packet handling code use RCU mode
and locks and make it only take a reference if the call/connection
gets queued on a workqueue.
The intention is that the next set will introduce the connection lifetime
management and capacity limits to prevent clients from overloading the
server.
There are some fixes too:
(1) Verifying that a packet coming in to a client connection came from the
expected source.
(2) Fix handling of connection failure in client call creation where we
don't reinitialise the list linkage block and a second attempt to
unlink the failed connection oopses and also we don't set the state
correctly, which causes an assertion failure.
(3) New service calls were being added to the socket's accept queue under
the wrong lock.
Changes:
(V2) In rxrpc_find_service_conn_rcu() initialised the sequence number to 0.
Fixed the RCU handling in conn_service.c by introducing and using
rb_replace_node_rcu() as an RCU-safe alternative in
rxrpc_publish_service_conn().
Modified and used rcu_dereference_raw() to avoid RCU sparse warnings
in rxrpc_find_service_conn_rcu().
Added in some missing RCU dereference wrappers. It seems to be
necessary to turn on CONFIG_PROVE_RCU_REPEATEDLY as well as
CONFIG_SPARSE_RCU_POINTER to get the static __rcu annotation checking
to happen.
Fixed some other sparse warnings, including a missing ntohs() in
jumbo packet processing.
(V3) Fixed some commit descriptions.
Excised the patch that duplicated the connection list to separate out
the procfs list for reconsideration at a later date.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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The LAN_WAKE_EN is not used to determine if the device could support
WOL. It is used to signal a GPIO pin when a WOL event occurs. The WOL
still works even though it is disabled.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Matt reported that we have a NULL pointer dereference
in ppp_pernet() from ppp_connect_channel(),
i.e. pch->chan_net is NULL.
This is due to that a parallel ppp_unregister_channel()
could happen while we are in ppp_connect_channel(), during
which pch->chan_net set to NULL. Since we need a reference
to net per channel, it makes sense to sync the refcnt
with the life time of the channel, therefore we should
release this reference when we destroy it.
Fixes: 1f461dcdd296 ("ppp: take reference on channels netns")
Reported-by: Matt Bennett <Matt.Bennett@alliedtelesis.co.nz>
Cc: Paul Mackerras <paulus@samba.org>
Cc: linux-ppp@vger.kernel.org
Cc: Guillaume Nault <g.nault@alphalink.fr>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Reviewed-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Commit aebea2ba0f74 ("net: mvneta: fix Tx interrupt delay") intended to
set coalescing threshold to a value guaranteeing interrupt generation
per each sent packet, so that buffers can be released with no delay.
In fact setting threshold to '1' was wrong, because it causes interrupt
every two packets. According to the documentation a reason behind it is
following - interrupt occurs once sent buffers counter reaches a value,
which is higher than one specified in MVNETA_TXQ_SIZE_REG(q). This
behavior was confirmed during tests. Also when testing the SoC working
as a NAS device, better performance was observed with int-per-packet,
as it strongly depends on the fact that all transmitted packets are
released immediately.
This commit enables NETA controller work in interrupt per sent packet mode
by setting coalescing threshold to 0.
Signed-off-by: Dmitri Epshtein <dima@marvell.com>
Signed-off-by: Marcin Wojtas <mw@semihalf.com>
Cc: <stable@vger.kernel.org> # v3.10+
Fixes aebea2ba0f74 ("net: mvneta: fix Tx interrupt delay")
Acked-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Use the new APIs for eliminating a copy on the receive path. These new APIs also
help in minimizing the number of memory barriers we end up issuing (in the
ringbuffer code) since we can better control when we want to expose the ring
state to the host.
The patch is being resent to address earlier email issues.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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hfsc_sched is huge (size: 920, cachelines: 15), but we can get it to 14
cachelines by placing level after filter_cnt (covering 4 byte hole) and
reducing period/nactive/flags to u32 (period is just a counter,
incremented when class becomes active -- 2**32 is plenty for this
purpose, also, long is only 32bit wide on 32bit platforms anyway).
cl_vtperiod is exported to userspace via tc_hfsc_stats, but its period
member is already u32, so no precision is lost there either.
Cc: Michal Soltys <soltys@ziu.info>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"Three fixes. One is the qla24xx MSI regression, one is a theoretical
problem over blacklist matching, which would bite USB badly if it ever
triggered and one is a system hang with a particular type of IPR
device"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
qla2xxx: Fix NULL pointer deref in QLA interrupt
SCSI: fix new bug in scsi_dev_info_list string matching
ipr: Clear interrupt on croc/crocodile when running with LSI
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Commit 5dcef69486 ("intel_idle: add BXT support") added an 8-element
lookup array with just a 2-bit value used for lookups. As per the SDM
that bit field is really 3 bits wide. While this is supposedly benign
here, future re-use of the code for other CPUs might expose the issue.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Since irtl_ns_units[] has itself zero entries, make sure the caller
recognized those cases along with the MSR read returning zero, as zero
is not a valid value for exit_latency and target_residency.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm into for-4.8/drivers
Dan writes:
"The removal of ->driverfs_dev in favor of just passing the parent
device in as a parameter to add_disk(). See below, it has received a
"Reviewed-by" from Christoph, Bart, and Johannes.
It is also a pre-requisite for Fam Zheng's work to cleanup gendisk
uevents vs attribute visibility [1]. We would extend device_add_disk()
to take an attribute_group list.
This is based off a branch of block.git/for-4.8/drivers and has
received a positive build success notification from the kbuild robot
across several configs.
[1]: "gendisk: Generate uevent after attribute available"
http://marc.info/?l=linux-virtualization&m=146725201522201&w=2"
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The current code will expose a zero value if one of the stats is
not available, but this is not what userspace expects. Instead,
if something goes wrong on providing some stats, it should be
changing the scale to FE_SCALE_NOT_AVAILABLE.
So, change the logic to do the right thing.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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cxd2841er_read_agc_gain_c added to obtain signal strength.
signal strength now relay on AGC value.
Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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The signal strength value is reversed: the bigger the number,
the weaker is the signal.
Fix the logic and present it in dBm. Please notice that the
dBm measure is actually an estimation, as the ratio is not
fully linear. It also varies with the frequency.
Yet, the estimation should be good enough for programs like
Kaffeine to indicate when the signal is good or bad.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Acked-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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It is a good idea to measure the signal strength while
tuning, as this helps to identify if the antenna is ok.
Also, such measure helps to identify the quality of the
signal.
Do some changes to enable it before signal lock. While
here, optimize the code to only initialize the stats
length once, and make sure that, just after set_frontend,
any reading for the stats that depends on lock to return
FE_SCALE_NOT_AVAILABLE.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Acked-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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The cec_msg_request_short_audio_descriptor function was missing the reply
argument. That's needed if you want the framework to wait for the reply
message.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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The cec_ops_* functions never touch cec_msg, so mark it as const.
This was done for some of the cec_ops_ functions, but not all.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Add msg->len sanity checks to fix static checker warning:
include/linux/cec-funcs.h:1154 cec_ops_set_osd_string()
warn: setting length 'msg->len - 3' to negative one
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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- Use IS_REACHABLE(RC_CORE) instead of IS_ENABLED: if cec is built-in and
RC_CORE is a module, then CEC can't reach the RC symbols.
- Both cec and cec-edid should be bool and use the same build 'mode' as
MEDIA_SUPPORT (just as is done for the media controller code).
- Add a note to staging that this should be changed once the cec framework
is moved out of staging.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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The MEDIA_CEC_EDID option is guarded by MEDIA_SUPPORT, so selecting
it from MEDIA_CEC produces a warning:
warning: (MEDIA_CEC) selects MEDIA_CEC_EDID which has unmet direct dependencies (MEDIA_SUPPORT)
The warning is harmless, but it's better to add an explicit
dependency to shut it up, to reduce the noise during randconfig
builds.
Fixes: ca684386e6e2 ("[media] cec: add HDMI CEC framework (api)")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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The suspend/resume functions in the s5p-cec driver are only
referenced when CONFIG_PM is enabled, so we get a warning
about unused functions otherwise:
drivers/staging/media/s5p-cec/s5p_cec.c:260:12: error: 's5p_cec_resume' defined but not used [-Werror=unused-function]
static int s5p_cec_resume(struct device *dev)
^~~~~~~~~~~~~~
drivers/staging/media/s5p-cec/s5p_cec.c:253:12: error: 's5p_cec_suspend' defined but not used [-Werror=unused-function]
static int s5p_cec_suspend(struct device *dev)
This marks them as __maybe_unused to avoid the warning without
having to introduce an extra #ifdef.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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CEC_MSG_REPORT_PHYSICAL_ADDR can theoretically be received from
an unregistered device, but in that case the code should not attempt
to write the received physical address to the phys_addrs array.
That would be pointless since there can be multiple unregistered
devices that report a physical address. We just ignore those.
While at it, improve the dprintk since it would attempt to read
from that array as well with the same out-of-bounds problem.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Like the videodev2.h and other headers, explicitly allow these headers
to be used with the BSD license.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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When a reply to an earlier transmit is received, the tx_status of that
transmit needs to be restored. Otherwise the status that the transmit
was successful would be lost.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Add the keymap module for HDMI CEC remote control commands.
Signed-off-by: Kamil Debski <kamil@wypas.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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* topic/cec:
[media] DocBook/media: add CEC documentation
[media] s5p_cec: get rid of an unused var
[media] move s5p-cec to staging
[media] vivid: add CEC emulation
[media] cec: s5p-cec: Add s5p-cec driver
[media] cec: adv7511: add cec support
[media] cec: adv7842: add cec support
[media] cec: adv7604: add cec support
[media] cec: add compat32 ioctl support
[media] cec/TODO: add TODO file so we know why this is still in staging
[media] cec: add HDMI CEC framework (api)
[media] cec: add HDMI CEC framework (adapter)
[media] cec: add HDMI CEC framework (core)
[media] cec-funcs.h: static inlines to pack/unpack CEC messages
[media] cec.h: add cec header
[media] cec-edid: add module for EDID CEC helper functions
[media] cec.txt: add CEC framework documentation
[media] rc: Add HDMI CEC protocol handling
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