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  1. 09 May, 2016 2 commits
  3. 03 May, 2016 20 commits
  5. 01 May, 2016 2 commits
  7. 09 Apr, 2016 6 commits
    • Michael Thalmeier's avatar
      NFC: pn533: add I2C phy driver · dd7bedcd
      Michael Thalmeier authored 
      This adds the I2C phy interface for the pn533 driver.
This way the driver can be used to interact with I2C
connected pn532 devices.
Signed-off-by: default avatarMichael Thalmeier <michael.thalmeier@hale.at>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
      dd7bedcd
    • Michael Thalmeier's avatar
      NFC: pn533: Separate physical layer from the core implementation · 9815c7cf
      Michael Thalmeier authored 
      The driver now has all core stuff isolated in one file, and all
the hardware link specifics in another. Writing a pn533 driver
on top of another hardware link is now just a matter of adding a
new file for that new hardware specifics.

The first user of this separation will be the i2c based pn532
driver that reuses pn533 core implementation on top of an i2c
layer.
Signed-off-by: default avatarMichael Thalmeier <michael.thalmeier@hale.at>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
      9815c7cf
    • Michael Thalmeier's avatar
      NFC: pn533: Fix socket deadlock · 37f895d7
      Michael Thalmeier authored 
      A deadlock can occur when the NFC raw socket is closed while
the driver is processing a command.

Following is the call graph of the affected situation:

send data via raw_sock:
-------------
rawsock_tx_work
  sock_hold => socket refcnt++
  nfc_data_exchange => cb = rawsock_data_exchange_complete

    ops->im_transceive = pn533_transceive => arg->cb = db
                               = rawsock_data_exchange_complete

      pn533_send_data_async => cb = pn533_data_exchange_complete

        __pn533_send_async => cmd->complete_cb = cb
                              = pn533_data_exchange_complete

          if_ops->send_frame_async

response:
--------
pn533_recv_response
  queue_work(priv->wq, &priv->cmd_complete_work)

pn533_wq_cmd_complete

  pn533_send_async_complete

    cmd->complete_cb() = pn533_data_exchange_complete()

      arg->cb() = rawsock_data_exchange_complete()

        sock_put => socket refcnt-- => If the corresponding
                    socket gets closed in the meantime socket
                    will be destructed

          sk_free

            __sk_free

              sk->sk_destruct = rawsock_destruct

                nfc_deactivate_target

                  ops->deactivate_target = pn533_deactivate_target

                    pn533_send_cmd_sync

                      pn533_send_cmd_async

                        __pn533_send_async

                          list_add_tail(&cmd->queue,&dev->cmd_queue)
                                  => add to command list because
                                     a command is currently
                                     processed

                        wait_for_completion
                                   => the workqueue thread waits
                                      here because it is the one
                                      processing the commands
                                         => deadlock

To fix the deadlock pn533_deactivate_target is changed to
issue the PN533_CMD_IN_RELEASE command in async mode. This
way nothing blocks and the release command is executed after
the current command.
Signed-off-by: default avatarMichael Thalmeier <michael.thalmeier@hale.at>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
      37f895d7
    • Michael Thalmeier's avatar
      NFC: pn533: Send ATR_REQ only if NFC_PROTO_NFC_DEP bit is set · e997ebbe
      Michael Thalmeier authored 
      Currently it is not possible to only poll for passive targets
with the pn533 driver. To change this ATR_REQ is only sent when
NFC_PROTO_NFC_DEP is explicitly requested in poll_protocols.
As most implementations (e.g. neard) poll for all protocols
that are reported to be supported by the adapter, this should
not have much of an effect on current implementations.
Signed-off-by: default avatarMichael Thalmeier <michael.thalmeier@hale.at>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
      e997ebbe
    • Eric Dumazet's avatar
      ipv6: fix inet6_lookup_listener() · 03c5b534
      Eric Dumazet authored 
      A stupid refactoring bug in inet6_lookup_listener() needs to be fixed
in order to get proper SO_REUSEPORT behavior.

Fixes: 3b24d854 ("tcp/dccp: do not touch listener sk_refcnt under synflood")
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Reported-by: default avatarMaciej Żenczykowski <maze@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      03c5b534
    • John Allen's avatar
      ibmvnic: Enable use of multiple tx/rx scrqs · 498cd8e4
      John Allen authored 
      Enables the use of multiple transmit and receive scrqs allowing the ibmvnic
driver to take advantage of multiqueue functionality. To achieve this, the
driver must implement the process of negotiating the maximum number of
queues allowed by the server. Initially, the driver will attempt to login
with the maximum number of tx and rx queues supported by the server. If
the server fails to allocate the requested number of scrqs, it will return
partial success in the login response. In this case, we must reinitiate
the login process from the request capabilities stage and attempt to login
requesting fewer scrqs.
Signed-off-by: default avatarJohn Allen <jallen@linux.vnet.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      498cd8e4
  9. 08 Apr, 2016 10 commits
    • David S. Miller's avatar
      Merge branch 'dsa-voidify-ops' · e013b778
      David S. Miller authored 
      Vivien Didelot says:

====================
net: dsa: voidify STP setter and FDB/VLAN add ops

Neither the DSA layer nor the bridge code (see br_set_state) really care
about eventual errors from STP state setters, so make it void.

The DSA layer separates the prepare and commit phases of switchdev in
two different functions. Logical errors must not happen in commit
routines, so make them void.

Changes v1 -> v2:
  - rename port_stp_update to port_stp_state_set
  - don't change code flow of bcm_sf2_sw_br_set_stp_state
  - prefer netdev_err over netdev_warn
====================
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      e013b778
    • Vivien Didelot's avatar
      net: dsa: make the VLAN add function return void · 4d5770b3
      Vivien Didelot authored 
      The switchdev design implies that a software error should not happen in
the commit phase since it must have been previously reported in the
prepare phase. If an hardware error occurs during the commit phase,
there is nothing switchdev can do about it.

The DSA layer separates port_vlan_prepare and port_vlan_add for
simplicity and convenience. If an hardware error occurs during the
commit phase, there is no need to report it outside the driver itself.

Make the DSA port_vlan_add routine return void for explicitness.
Signed-off-by: default avatarVivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      4d5770b3
    • Vivien Didelot's avatar
      net: dsa: make the FDB add function return void · 8497aa61
      Vivien Didelot authored 
      The switchdev design implies that a software error should not happen in
the commit phase since it must have been previously reported in the
prepare phase. If an hardware error occurs during the commit phase,
there is nothing switchdev can do about it.

The DSA layer separates port_fdb_prepare and port_fdb_add for simplicity
and convenience. If an hardware error occurs during the commit phase,
there is no need to report it outside the DSA driver itself.

Make the DSA port_fdb_add routine return void for explicitness.
Signed-off-by: default avatarVivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      8497aa61
    • Vivien Didelot's avatar
      net: dsa: make the STP state function return void · 43c44a9f
      Vivien Didelot authored 
      The DSA layer doesn't care about the return code of the port_stp_update
routine, so make it void in the layer and the DSA drivers.

Replace the useless dsa_slave_stp_update function with a
dsa_slave_stp_state function used to reply to the switchdev
SWITCHDEV_ATTR_ID_PORT_STP_STATE attribute.

In the meantime, rename port_stp_update to port_stp_state_set to
explicit the state change.
Signed-off-by: default avatarVivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      43c44a9f
    • Vivien Didelot's avatar
      net: dsa: document missing functions · f453939c
      Vivien Didelot authored 
      Add description for the missing port_vlan_prepare, port_fdb_prepare,
port_fdb_dump functions in the DSA documentation.
Signed-off-by: default avatarVivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f453939c
    • David S. Miller's avatar
      Merge tag 'mac80211-next-for-davem-2016-04-06' of... · 1089ac69
      David S. Miller authored 
      Merge tag 'mac80211-next-for-davem-2016-04-06' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next

Johannes Berg says:

====================
For the 4.7 cycle, we have a number of changes:
 * Bob's mesh mode rhashtable conversion, this includes
   the rhashtable API change for allocation flags
 * BSSID scan, connect() command reassoc support (Jouni)
 * fast (optimised data only) and support for RSS in mac80211 (myself)
 * various smaller changes
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      1089ac69
    • Daniel Borkmann's avatar
      bpf, verifier: further improve search pruning · 07016151
      Daniel Borkmann authored 
      The verifier needs to go through every path of the program in
order to check that it terminates safely, which can be quite a
lot of instructions that need to be processed f.e. in cases with
more branchy programs. With search pruning from f1bca824 ("bpf:
add search pruning optimization to verifier") the search space can
already be reduced significantly when the verifier detects that
a previously walked path with same register and stack contents
terminated already (see verifier's states_equal()), so the search
can skip walking those states.

When working with larger programs of > ~2000 (out of max 4096)
insns, we found that the current limit of 32k instructions is easily
hit. For example, a case we ran into is that the search space cannot
be pruned due to branches at the beginning of the program that make
use of certain stack space slots (STACK_MISC), which are never used
in the remaining program (STACK_INVALID). Therefore, the verifier
needs to walk paths for the slots in STACK_INVALID state, but also
all remaining paths with a stack structure, where the slots are in
STACK_MISC, which can nearly double the search space needed. After
various experiments, we find that a limit of 64k processed insns is
a more reasonable choice when dealing with larger programs in practice.
This still allows to reject extreme crafted cases that can have a
much higher complexity (f.e. > ~300k) within the 4096 insns limit
due to search pruning not being able to take effect.

Furthermore, we found that a lot of states can be pruned after a
call instruction, f.e. we were able to reduce the search state by
~35% in some cases with this heuristic, trade-off is to keep a bit
more states in env->explored_states. Usually, call instructions
have a number of preceding register assignments and/or stack stores,
where search pruning has a better chance to suceed in states_equal()
test. The current code marks the branch targets with STATE_LIST_MARK
in case of conditional jumps, and the next (t + 1) instruction in
case of unconditional jump so that f.e. a backjump will walk it. We
also did experiments with using t + insns[t].off + 1 as a marker in
the unconditionally jump case instead of t + 1 with the rationale
that these two branches of execution that converge after the label
might have more potential of pruning. We found that it was a bit
better, but not necessarily significantly better than the current
state, perhaps also due to clang not generating back jumps often.
Hence, we left that as is for now.
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: default avatarAlexei Starovoitov <ast@kernel.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      07016151
    • Jiri Pirko's avatar
      devlink: share user_ptr pointer for both devlink and devlink_port · 1fc2257e
      Jiri Pirko authored 
      Ptr to devlink structure can be easily obtained from
devlink_port->devlink. So share user_ptr[0] pointer for both and leave
user_ptr[1] free for other users.
Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
Reviewed-by: default avatarIdo Schimmel <idosch@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      1fc2257e
    • David S. Miller's avatar
      Merge branch 'mlxsw-next' · 67b5b21f
      David S. Miller authored 
      Jiri Pirko says:

====================
mlxsw: small driver update + one tiny devlink dependency

Cosmetics, in preparation to sharedbuffer patchset.
First patch is here to allow patch number two.
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      67b5b21f
    • Jiri Pirko's avatar
      mlxsw: reg: Fix SBPM register name · 9efc8f65
      Jiri Pirko authored 
      Fix copy&paste error and state the name of SBPM register correctly.
Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
Reviewed-by: default avatarIdo Schimmel <idosch@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      9efc8f65
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