Commit graph

694401 commits

Author SHA1 Message Date
Bhumika Goyal
58e0c0db85 net: ethernet: ax88796: make mdiobb_ops const
Make this const as it is only stored in a const field of a
mdiobb_ctrl structure.

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 14:20:54 -07:00
David S. Miller
3d845ee122 Merge branch 'tcp_conn_request-cleanup'
Tonghao Zhang says:

====================
tcp: Simplify the tcp_conn_request.

Just simplify the tcp_conn_request function.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 14:16:13 -07:00
Tonghao Zhang
1119936927 tcp: Remove the unused parameter for tcp_try_fastopen.
Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 14:16:12 -07:00
Tonghao Zhang
49c71586a6 tcp: Get a proper dst before checking it.
tcp_peer_is_proven needs a proper route to make the
determination, but dst always is NULL. This bug may
be there at the beginning of git tree. This does not
look serious enough to deserve backports to stable
versions.

Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 14:16:12 -07:00
David S. Miller
6c64793514 Merge branch 'hv_netvsc-Ethtool-handler-to-change-UDP-hash-levels'
Haiyang Zhang says:

====================
hv_netvsc: Ethtool handler to change UDP hash levels

The patch set adds the functions to switch UDP hash level between
L3 and L4 by ethtool command. UDP over IPv4 and v6 can be set
differently. The default hash level is L4. We currently only
allow switching TX hash level from within the guests.

The ethtool callback function is triggered by command line, and
update the per device variables of the hash level.

On Azure, fragmented UDP packets is not yet supported with L4
hashing, and may have high packet loss rate. Using L3 hashing is
recommended in this case. This ethtool option allows a user to
make this selection.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 14:08:12 -07:00
Haiyang Zhang
3b0c34580b hv_netvsc: Update netvsc Document for UDP hash level setting
Update Documentation/networking/netvsc.txt for UDP hash level setting
and related info.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 14:08:12 -07:00
Haiyang Zhang
4823eb2f3a hv_netvsc: Add ethtool handler to set and get UDP hash levels
The patch add the functions to switch UDP hash level between
L3 and L4 by ethtool command. UDP over IPv4 and v6 can be set
differently. The default hash level is L4. We currently only
allow switching TX hash level from within the guests.

On Azure, fragmented UDP packets have high loss rate with L4
hashing. Using L3 hashing is recommended in this case.

For example, for UDP over IPv4 on eth0:
To include UDP port numbers in hasing:
	ethtool -N eth0 rx-flow-hash udp4 sdfn
To exclude UDP port numbers in hasing:
	ethtool -N eth0 rx-flow-hash udp4 sd
To show UDP hash level:
	ethtool -n eth0 rx-flow-hash udp4

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 14:08:12 -07:00
Haiyang Zhang
4c0e2cbfd9 hv_netvsc: Clean up unused parameter from netvsc_get_rss_hash_opts()
The parameter "nvdev" is not in use.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 14:08:11 -07:00
Haiyang Zhang
fcba1569a0 hv_netvsc: Clean up unused parameter from netvsc_get_hash()
The parameter "sk" is not in use.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 14:08:11 -07:00
David S. Miller
0580b53f38 Merge branch 'liquidio-VF-driver-will-notify-NIC-firmware-of-MTU-change'
Veerasenareddy Burru says:

====================
liquidio: VF driver will notify NIC firmware of MTU change

Make VF driver notify NIC firmware of MTU change.  Firmware needs this
information for MTU propagation and enforcement.

The first patch in this series moves a macro definition to a proper place
to prevent a build error in the second patch which has the code that sends
the notification.

Change Log:
  V1 -> V2
    * Add "From:" line to patch #1 and #2 to give credit to the author.
    * In patch #2, order local variable declarations from longest to
      shortest line.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 11:08:16 -07:00
Veerasenareddy Burru
ee5b1fac56 liquidio: make VF driver notify NIC firmware of MTU change
Signed-off-by: Veerasenareddy Burru <veerasenareddy.burru@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 11:08:15 -07:00
Veerasenareddy Burru
ad530a1d40 liquidio: move macro definition to a proper place
The macro LIO_CMD_WAIT_TM is not specific to the PF driver; it can be used
by the VF driver too, so move its definition from a PF-specific header file
to one that's common to PF and VF.

Signed-off-by: Veerasenareddy Burru <veerasenareddy.burru@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 11:08:15 -07:00
Bhumika Goyal
7d47e9a205 ptp: make ptp_clock_info const
Make these const as they are only used in a copy operation.
Done using Coccinelle.

@match disable optional_qualifier@
identifier s;
@@
static struct ptp_clock_info s = {...};

@ref@
position p;
identifier match.s;
@@
s@p

@good1@
position ref.p;
identifier match.s,f,c;
expression e;
@@
(
e = s@p
|
e = s@p.f
|
c(...,s@p.f,...)
|
c(...,s@p,...)
)

@bad depends on  !good1@
position ref.p;
identifier match.s;
@@
s@p

@depends on forall !bad disable optional_qualifier@
identifier match.s;
@@
static
+ const
struct ptp_clock_info s;

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 11:04:51 -07:00
Bhumika Goyal
b6d08bd81d net: ethernet: make ptp_clock_info const
Make these const as they are only used in a copy operation.
Done using Coccinelle.

@match disable optional_qualifier@
identifier s;
@@
static struct ptp_clock_info s = {...};

@ref@
position p;
identifier match.s;
@@
s@p

@good1@
position ref.p;
identifier match.s,f,c;
expression e;
@@
(
e = s@p
|
e = s@p.f
|
c(...,s@p.f,...)
|
c(...,s@p,...)
)

@bad depends on  !good1@
position ref.p;
identifier match.s;
@@
s@p

@depends on forall !bad disable optional_qualifier@
identifier match.s;
@@
static
+ const
struct ptp_clock_info s;

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 11:04:51 -07:00
Salil
a8e8b7ff35 net: hns3: Add support to change MTU in HNS3 hardware
This patch adds the following support to the HNS3 driver:
1. Support to change the Maximum Transmission Unit of a
   port in the HNS NIC hardware.
2. Initializes the supported MTU range for the netdevice.

Signed-off-by: lipeng <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 11:02:21 -07:00
David S. Miller
06552f8e18 Merge branch 'Huawei-HiNIC-Ethernet-Driver'
Aviad Krawczyk says:

====================
Huawei HiNIC Ethernet Driver

The patch-set contains the support of the HiNIC Ethernet driver for
hinic family of PCIE Network Interface Cards.

The Huawei's PCIE HiNIC card is a new Ethernet card and hence there was
a need of a new driver.

The current driver is meant to be used for the Physical Function and there
would soon be a support for Virtual Function and more features once the
basic PF driver has been accepted.

Changes V7 -> V8:
1. Remove unnecessary cast from void * - Stephen Hemminger comment
	https://lkml.org/lkml/2017/8/17/1008

Changes V6 -> V7:
1. Separate netpoll and MAINTAINERS patch - Sergei Shtylyov comment
	https://lkml.org/lkml/2017/8/17/479

Changes V5 -> V6:
1. Fix cover letter Message-Id

Changes V4 -> V5:
1. Remove select_queue NOP - David Miller comment
        https://lkml.org/lkml/2017/8/16/625

Changes V3 -> V4:
1. Reverse christmas tree order - David Miller comment
        https://lkml.org/lkml/2017/8/3/862

Changes V2 -> V3:
1. Replace dev_ functions by netif_ functions - Joe Perches comment
        https://lkml.org/lkml/2017/7/19/424
2. Fix the driver directory in MAINTAINERS file - Sergei Shtylyov comment
        https://lkml.org/lkml/2017/7/19/615
3. Add a newline at the end of Makefile - David Miller comment
        https://lkml.org/lkml/2017/7/19/1345
4. Return a pointer as a val instead of in arg - Francois Romieu comment
        https://lkml.org/lkml/2017/7/19/1319
5. Change the error labels to err_xyz - Francois Romieu comment
        https://lkml.org/lkml/2017/7/19/1319
6. Remove check of Func Type in free function - Francois Romieu comment
        https://lkml.org/lkml/2017/7/19/1319
7. Remove !netdev check in remove function - Francois Romieu comment
        https://lkml.org/lkml/2017/7/19/1319
8. Use module_pci_driver - Francois Romieu comment
        https://lkml.org/lkml/2017/7/19/1319
9. Move the PCI device ID to the .c file - Francois Romieu comment
        https://lkml.org/lkml/2017/7/19/1319
10. Remove void * to avoid passing wrong ptr - Francois Romieu comment
        https://lkml.org/lkml/2017/7/19/1319

Changes V1 -> V2:
1. remove driver verstion - Andrew Lunn comment
        https://lkml.org/lkml/2017/7/12/372
2. replace kzalloc by devm_kzalloc for short clean - Andrew Lunn comment
        https://lkml.org/lkml/2017/7/12/372
3. replace pr_ functions by dev_ functions - Andrew Lunn comment
        https://lkml.org/lkml/2017/7/12/375
4. seperate last patch by moving ops to a new patch - Andrew Lunn comment
        https://lkml.org/lkml/2017/7/12/377
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:48:54 -07:00
Aviad Krawczyk
4d3b632707 net-next/hinic: Add Maintainer
Update MAINTAINERS file

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:48:54 -07:00
Aviad Krawczyk
b553400bb4 net-next/hinic: Add netpoll
Add more netdev operation - netpoll.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:48:54 -07:00
Aviad Krawczyk
edd384f682 net-next/hinic: Add ethtool and stats
Add ethtool operations and statistics operations.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:48:54 -07:00
Aviad Krawczyk
00e57a6d4a net-next/hinic: Add Tx operation
Add transmit operation for sending data by qp operations.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:48:54 -07:00
Aviad Krawczyk
e2585ea775 net-next/hinic: Add Rx handler
Set the io resources in the nic and handle rx events by qp operations.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:48:54 -07:00
Aviad Krawczyk
7ef37fe4c1 net-next/hinic: Add cmdq completion handler
Add cmdq completion handler for getting a notification about the
completion of cmdq commands.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:48:54 -07:00
Aviad Krawczyk
76baca2e92 net-next/hinic: Add cmdq commands
Add cmdq commands for setting queue pair contexts in the nic.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:48:53 -07:00
Aviad Krawczyk
fc9319e402 net-next/hinic: Add ceqs
Initialize the completion event queues and handle ceq events by calling
the registered handlers. Used for cmdq command completion.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:48:53 -07:00
Aviad Krawczyk
d0b9805e82 net-next/hinic: Initialize cmdq
Create the work queues for cmdq and update the nic about the work queue
contexts. cmdq commands are used for updating the nic about the qp
contexts.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:48:53 -07:00
Aviad Krawczyk
53e7d6feb9 net-next/hinic: Set qp context
Update the nic about the resources of the queue pairs.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:48:53 -07:00
Aviad Krawczyk
f91090f7da net-next/hinic: Add qp resources
Create the resources for queue pair operations: doorbell area,
consumer index address and producer index address.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:48:53 -07:00
Aviad Krawczyk
b15a9f37be net-next/hinic: Add wq
Create work queues for being used by the queue pairs.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:48:53 -07:00
Aviad Krawczyk
c3e79baf1b net-next/hinic: Add logical Txq and Rxq
Create the logical queues of the nic.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:48:53 -07:00
Aviad Krawczyk
c4d06d2d20 net-next/hinic: Add Rx mode and link event handler
Add port management message for setting Rx mode in the card,
used for rx_mode netdev operation.
The link event handler is used for getting a notification about the
link state.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:48:53 -07:00
Aviad Krawczyk
25a3ba6106 net-next/hinic: Add port management commands
Add the port management commands that are sent as management messages.
The port management commands are used for netdev operations.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:48:53 -07:00
Aviad Krawczyk
f00fe738b5 net-next/hinic: Add aeqs
Handle aeq elements that are accumulated on the aeq by calling the
registered handler for the specific event.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:48:53 -07:00
Aviad Krawczyk
0ac599c790 net-next/hinic: Add api cmd commands
Add the api cmd commands for sending management messages to the nic.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:48:53 -07:00
Aviad Krawczyk
6dd8b68214 net-next/hinic: Add management messages
Add the management messages for sending to api cmd and the asynchronous
event handler for the completion of the messages.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:48:53 -07:00
Aviad Krawczyk
3dcea32193 net-next/hinic: Initialize api cmd hw
Update the hardware about api cmd resources and initialize it.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:48:52 -07:00
Aviad Krawczyk
eabf0fad81 net-next/hinic: Initialize api cmd resources
Initialize api cmd resources as part of management initialization.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:48:52 -07:00
Aviad Krawczyk
a5564e7e44 net-next/hinic: Initialize hw device components
Initialize hw device by calling the initialization functions of aeqs and
management channel.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:48:52 -07:00
Aviad Krawczyk
51ba902a16 net-next/hinic: Initialize hw interface
Initialize hw interface as part of the nic initialization for accessing hw.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:48:52 -07:00
David Wu
89c9c1636f net: ethernet: stmmac: dwmac-rk: Add rv1108 gmac support
It only supports rmii interface. Add constants and callback functions
for the dwmac on rv1108 socs. As can be seen, the base structure is
the same, only registers and the bits in them moved slightly.

Signed-off-by: David Wu <david.wu@rock-chips.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:30:58 -07:00
Dan Carpenter
d3213fbf69 ethernet: xircom: small clean up in setup_xirc2ps_cs()
The get_options() function takes the whole ARRAY_SIZE().  It doesn't
matter here because we don't use more than 7 elements.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 10:30:00 -07:00
Shubham Bansal
39c13c204b arm: eBPF JIT compiler
The JIT compiler emits ARM 32 bit instructions. Currently, It supports
eBPF only. Classic BPF is supported because of the conversion by BPF core.

This patch is essentially changing the current implementation of JIT compiler
of Berkeley Packet Filter from classic to internal with almost all
instructions from eBPF ISA supported except the following
	BPF_ALU64 | BPF_DIV | BPF_K
	BPF_ALU64 | BPF_DIV | BPF_X
	BPF_ALU64 | BPF_MOD | BPF_K
	BPF_ALU64 | BPF_MOD | BPF_X
	BPF_STX | BPF_XADD | BPF_W
	BPF_STX | BPF_XADD | BPF_DW

Implementation is using scratch space to emulate 64 bit eBPF ISA on 32 bit
ARM because of deficiency of general purpose registers on ARM. Currently,
only LITTLE ENDIAN machines are supported in this eBPF JIT Compiler.

Tested on ARMv7 with QEMU by me (Shubham Bansal).

Testing results on ARMv7:

1) test_bpf: Summary: 341 PASSED, 0 FAILED, [312/333 JIT'ed]
2) test_tag: OK (40945 tests)
3) test_progs: Summary: 30 PASSED, 0 FAILED
4) test_lpm: OK
5) test_lru_map: OK

Above tests are all done with following flags enabled discreatly.

1) bpf_jit_enable=1
	a) CONFIG_FRAME_POINTER enabled
	b) CONFIG_FRAME_POINTER disabled
2) bpf_jit_enable=1 and bpf_jit_harden=2
	a) CONFIG_FRAME_POINTER enabled
	b) CONFIG_FRAME_POINTER disabled

See Documentation/networking/filter.txt for more information.

Signed-off-by: Shubham Bansal <illusionist.neo@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-22 09:26:43 -07:00
David S. Miller
e2a7c34fb2 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-08-21 17:06:42 -07:00
Linus Torvalds
6470812e22 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
Pull sparc fixes from David Miller:
 "Just a couple small fixes, two of which have to do with gcc-7:

   1) Don't clobber kernel fixed registers in __multi4 libgcc helper.

   2) Fix a new uninitialized variable warning on sparc32 with gcc-7,
      from Thomas Petazzoni.

   3) Adjust pmd_t initializer on sparc32 to make gcc happy.

   4) If ATU isn't available, don't bark in the logs. From Tushar Dave"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc: kernel/pcic: silence gcc 7.x warning in pcibios_fixup_bus()
  sparc64: remove unnecessary log message
  sparc64: Don't clibber fixed registers in __multi4.
  mm: add pmd_t initializer __pmd() to work around a GCC bug.
2017-08-21 14:07:48 -07:00
Thomas Petazzoni
2dc77533f1 sparc: kernel/pcic: silence gcc 7.x warning in pcibios_fixup_bus()
When building the kernel for Sparc using gcc 7.x, the build fails
with:

arch/sparc/kernel/pcic.c: In function ‘pcibios_fixup_bus’:
arch/sparc/kernel/pcic.c:647:8: error: ‘cmd’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
    cmd |= PCI_COMMAND_IO;
        ^~

The simplified code looks like this:

unsigned int cmd;
[...]
pcic_read_config(dev->bus, dev->devfn, PCI_COMMAND, 2, &cmd);
[...]
cmd |= PCI_COMMAND_IO;

I.e, the code assumes that pcic_read_config() will always initialize
cmd. But it's not the case. Looking at pcic_read_config(), if
bus->number is != 0 or if the size is not one of 1, 2 or 4, *val will
not be initialized.

As a simple fix, we initialize cmd to zero at the beginning of
pcibios_fixup_bus.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-21 13:57:22 -07:00
Gao Feng
7d3f0cd43f net: sched: Add the invalid handle check in qdisc_class_find
Add the invalid handle "0" check to avoid unnecessary search, because
the qdisc uses the skb->priority as the handle value to look up, and
it is "0" usually.

Signed-off-by: Gao Feng <gfree.wind@vip.163.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-21 13:40:31 -07:00
Jon Paul Maloy
40501f90ed tipc: don't reset stale broadcast send link
When the broadcast send link after 100 attempts has failed to
transfer a packet to all peers, we consider it stale, and reset
it. Thereafter it needs to re-synchronize with the peers, something
currently done by just resetting and re-establishing all links to
all peers. This has turned out to be overkill, with potentially
unwanted consequences for the remaining cluster.

A closer analysis reveals that this can be done much simpler. When
this kind of failure happens, for reasons that may lie outside the
TIPC protocol, it is typically only one peer which is failing to
receive and acknowledge packets. It is hence sufficient to identify
and reset the links only to that peer to resolve the situation, without
having to reset the broadcast link at all. This solution entails a much
lower risk of negative consequences for the own node as well as for
the overall cluster.

We implement this change in this commit.

Reviewed-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-21 13:37:45 -07:00
Linus Torvalds
05ab303b4f ARC fixes for 4.13-rc7
- PAE40 related updates
 
  - SLC errata for region ops
 
  - intc line masking by default
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Merge tag 'arc-4.13-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc

Pull ARC fixes from Vineet Gupta:

 - PAE40 related updates

 - SLC errata for region ops

 - intc line masking by default

* tag 'arc-4.13-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
  arc: Mask individual IRQ lines during core INTC init
  ARCv2: PAE40: set MSB even if !CONFIG_ARC_HAS_PAE40 but PAE exists in SoC
  ARCv2: PAE40: Explicitly set MSB counterpart of SLC region ops addresses
  ARC: dma: implement dma_unmap_page and sg variant
  ARCv2: SLC: Make sure busy bit is set properly for region ops
  ARC: [plat-sim] Include this platform unconditionally
  ARC: [plat-axs10x]: prepare dts files for enabling PAE40 on axs103
  ARC: defconfig: Cleanup from old Kconfig options
2017-08-21 13:30:36 -07:00
Linus Torvalds
0b3baec853 RTC fixes for 4.13:
- ds1307: fix regmap configuration
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Merge tag 'rtc-4.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux

Pull RTC fix from Alexandre Belloni:
 "Fix regmap configuration for ds1307"

* tag 'rtc-4.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux:
  rtc: ds1307: fix regmap config
2017-08-21 13:27:51 -07:00
Linus Torvalds
e3181f2c0c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:

 1) Fix IGMP handling wrt VRF, from David Ahern.

 2) Fix timer access to freed object in dccp, from Eric Dumazet.

 3) Use kmalloc_array() in ptr_ring to avoid overflow cases which are
    triggerable by userspace. Also from Eric Dumazet.

 4) Fix infinite loop in unmapping cleanup of nfp driver, from Colin Ian
    King.

 5) Correct datagram peek handling of empty SKBs, from Matthew Dawson.

 6) Fix use after free in TIPC, from Eric Dumazet.

 7) When replacing a route in ipv6 we need to reset the round robin
    pointer, from Wei Wang.

 8) Fix bug in pci_find_pcie_root_port() which was unearthed by the
    relaxed ordering changes, from Thierry Redding. I made sure to get
    an explicit ACK from Bjorn this time around :-)

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (27 commits)
  ipv6: repair fib6 tree in failure case
  net_sched: fix order of queue length updates in qdisc_replace()
  tools lib bpf: improve warning
  switchdev: documentation: minor typo fixes
  bpf, doc: also add s390x as arch to sysctl description
  net: sched: fix NULL pointer dereference when action calls some targets
  rxrpc: Fix oops when discarding a preallocated service call
  irda: do not leak initialized list.dev to userspace
  net/mlx4_core: Enable 4K UAR if SRIOV module parameter is not enabled
  PCI: Allow PCI express root ports to find themselves
  tcp: when rearming RTO, if RTO time is in past then fire RTO ASAP
  net: check and errout if res->fi is NULL when RTM_F_FIB_MATCH is set
  ipv6: reset fn->rr_ptr when replacing route
  sctp: fully initialize the IPv6 address in sctp_v6_to_addr()
  tipc: fix use-after-free
  tun: handle register_netdevice() failures properly
  datagram: When peeking datagrams with offset < 0 don't skip empty skbs
  bpf, doc: improve sysctl knob description
  netxen: fix incorrect loop counter decrement
  nfp: fix infinite loop on umapping cleanup
  ...
2017-08-21 13:16:27 -07:00
Oleg Nesterov
dd1c1f2f20 pids: make task_tgid_nr_ns() safe
This was reported many times, and this was even mentioned in commit
52ee2dfdd4 ("pids: refactor vnr/nr_ns helpers to make them safe") but
somehow nobody bothered to fix the obvious problem: task_tgid_nr_ns() is
not safe because task->group_leader points to nowhere after the exiting
task passes exit_notify(), rcu_read_lock() can not help.

We really need to change __unhash_process() to nullify group_leader,
parent, and real_parent, but this needs some cleanups.  Until then we
can turn task_tgid_nr_ns() into another user of __task_pid_nr_ns() and
fix the problem.

Reported-by: Troy Kensinger <tkensinger@google.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-21 12:47:31 -07:00