1. 11 Apr, 2015 10 commits
  2. 10 Apr, 2015 2 commits
    • Martin Sperl's avatar
      spi: bcm2835: enabling polling mode for transfers shorter than 30us · 704f32d4
      Martin Sperl authored
      In cases of short transfer times the CPU is spending lots of time
      in the interrupt handler and scheduler to reschedule the worker thread.
      
      Measurements show that we have times where it takes 29.32us to between
      the last clock change and the time that the worker-thread is running again
      returning from wait_for_completion_timeout().
      
      During this time the interrupt-handler is running calling complete()
      and then also the scheduler is rescheduling the worker thread.
      
      This time can vary depending on how much of the code is still in
      CPU-caches, when there is a burst of spi transfers the subsequent delays
      are in the order of 25us, so the value of 30us seems reasonable.
      
      With polling the whole transfer of 4 bytes at 10MHz finishes after 6.16us
      (CS down to up) with the real transfer (clock running) taking 3.56us.
      So the efficiency has much improved and is also freeing CPU cycles,
      reducing interrupts and context switches.
      
      Because of the above 30us seems to be a reasonable limit for polling.
      Signed-off-by: default avatarMartin Sperl <kernel@martin.sperl.org>
      Signed-off-by: default avatarMark Brown <broonie@kernel.org>
      704f32d4
    • Martin Sperl's avatar
      spi: bcm2835: transform native-cs to gpio-cs on first spi_setup · a30a555d
      Martin Sperl authored
      Transforms the bcm-2835 native SPI-chip select to their gpio-cs equivalent.
      
      This allows for some support of some optimizations that are not
      possible due to HW-gliches on the CS line - especially filling
      the FIFO before enabling SPI interrupts (by writing to CS register)
      while the transfer is already in progress (See commit: e3a2be30)
      
      This patch also works arround some issues in bcm2835-pinctrl which does not
      set the value when setting the GPIO as output - it just sets up output and
      (typically) leaves the GPIO as low.  When a fix for this is merged then this
      gpio_set_value can get removed from bcm2835_spi_setup.
      Signed-off-by: default avatarMartin Sperl <kernel@martin.sperl.org>
      Signed-off-by: default avatarMark Brown <broonie@kernel.org>
      a30a555d
  3. 08 Apr, 2015 6 commits
  4. 07 Apr, 2015 4 commits
  5. 06 Apr, 2015 12 commits
    • Linus Torvalds's avatar
      Linux 4.0-rc7 · f22e6e84
      Linus Torvalds authored
      f22e6e84
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · 442bb4ba
      Linus Torvalds authored
      Pull networking fixes from David Miller:
      
       1) In TCP, don't register an FRTO for cumulatively ACK'd data that was
          previously SACK'd, from Neal Cardwell.
      
       2) Need to hold RNL mutex in ipv4 multicast code namespace cleanup,
          from Cong WANG.
      
       3) Similarly we have to hold RNL mutex for fib_rules_unregister(), also
          from Cong WANG.
      
       4) Revert and rework netns nsid allocation fix, from Nicolas Dichtel.
      
       5) When we encapsulate for a tunnel device, skb->sk still points to the
          user socket.  So this leads to cases where we retraverse the
          ipv4/ipv6 output path with skb->sk being of some other address
          family (f.e. AF_PACKET).  This can cause things to crash since the
          ipv4 output path is dereferencing an AF_PACKET socket as if it were
          an ipv4 one.
      
          The short term fix for 'net' and -stable is to elide these socket
          checks once we've entered an encapsulation sequence by testing
          xmit_recursion.
      
          Longer term we have a better solution wherein we pass the tunnel's
          socket down through the output paths, but that is way too invasive
          for 'net' and -stable.
      
          From Hannes Frederic Sowa.
      
       6) l2tp_init() failure path forgets to unregister per-net ops, from
          Cong WANG.
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
        net/mlx4_core: Fix error message deprecation for ConnectX-2 cards
        net: dsa: fix filling routing table from OF description
        l2tp: unregister l2tp_net_ops on failure path
        mvneta: dont call mvneta_adjust_link() manually
        ipv6: protect skb->sk accesses from recursive dereference inside the stack
        netns: don't allocate an id for dead netns
        Revert "netns: don't clear nsid too early on removal"
        ip6mr: call del_timer_sync() in ip6mr_free_table()
        net: move fib_rules_unregister() under rtnl lock
        ipv4: take rtnl_lock and mark mrt table as freed on namespace cleanup
        tcp: fix FRTO undo on cumulative ACK of SACKed range
        xen-netfront: transmit fully GSO-sized packets
      442bb4ba
    • Jack Morgenstein's avatar
      net/mlx4_core: Fix error message deprecation for ConnectX-2 cards · fde913e2
      Jack Morgenstein authored
      Commit 1daa4303 ("net/mlx4_core: Deprecate error message at
      ConnectX-2 cards startup to debug") did the deprecation only for port 1
      of the card. Need to deprecate for port 2 as well.
      
      Fixes: 1daa4303 ("net/mlx4_core: Deprecate error message at ConnectX-2 cards startup to debug")
      Signed-off-by: default avatarJack Morgenstein <jackm@dev.mellanox.co.il>
      Signed-off-by: default avatarAmir Vadai <amirv@mellanox.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      fde913e2
    • Pavel Nakonechny's avatar
      net: dsa: fix filling routing table from OF description · 30303813
      Pavel Nakonechny authored
      According to description in 'include/net/dsa.h', in cascade switches
      configurations where there are more than one interconnected devices,
      'rtable' array in 'dsa_chip_data' structure is used to indicate which
      port on this switch should be used to send packets to that are destined
      for corresponding switch.
      
      However, dsa_of_setup_routing_table() fills 'rtable' with port numbers
      of the _target_ switch, but not current one.
      
      This commit removes redundant devicetree parsing and adds needed port
      number as a function argument. So dsa_of_setup_routing_table() now just
      looks for target switch number by parsing parent of 'link' device node.
      
      To remove possible misunderstandings with the way of determining target
      switch number, a corresponding comment was added to the source code and
      to the DSA device tree bindings documentation file.
      
      This was tested on a custom board with two Marvell 88E6095 switches with
      following corresponding routing tables: { -1, 10 } and { 8, -1 }.
      Signed-off-by: default avatarPavel Nakonechny <pavel.nakonechny@skitlab.ru>
      Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
      Reviewed-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      30303813
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input · 9e441639
      Linus Torvalds authored
      Pull input fixes from Dmitry Torokhov:
       "Updates for the input subsystem - two more tweaks for ALPS driver to
        work out kinks after splitting the touchpad, trackstick, and potential
        external PS/2 mouse into separate input devices.
      
        Changes to support ALPS SS4 devices (protocol V8) will be coming in
        4.1..."
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
        Input: alps - document stick behavior for protocol V2
        Input: alps - report V2 Dualpoint Stick events via the right evdev node
        Input: alps - report interleaved bare PS/2 packets via dev3
      9e441639
    • WANG Cong's avatar
      67e04c29
    • Stas Sergeev's avatar
      mvneta: dont call mvneta_adjust_link() manually · ecf7b361
      Stas Sergeev authored
      mvneta_adjust_link() is a callback for of_phy_connect() and should
      not be called directly. The result of calling it directly is as below:
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ecf7b361
    • hannes@stressinduktion.org's avatar
      ipv6: protect skb->sk accesses from recursive dereference inside the stack · f60e5990
      hannes@stressinduktion.org authored
      We should not consult skb->sk for output decisions in xmit recursion
      levels > 0 in the stack. Otherwise local socket settings could influence
      the result of e.g. tunnel encapsulation process.
      
      ipv6 does not conform with this in three places:
      
      1) ip6_fragment: we do consult ipv6_npinfo for frag_size
      
      2) sk_mc_loop in ipv6 uses skb->sk and checks if we should
         loop the packet back to the local socket
      
      3) ip6_skb_dst_mtu could query the settings from the user socket and
         force a wrong MTU
      
      Furthermore:
      In sk_mc_loop we could potentially land in WARN_ON(1) if we use a
      PF_PACKET socket ontop of an IPv6-backed vxlan device.
      
      Reuse xmit_recursion as we are currently only interested in protecting
      tunnel devices.
      
      Cc: Jiri Pirko <jiri@resnulli.us>
      Signed-off-by: default avatarHannes Frederic Sowa <hannes@stressinduktion.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f60e5990
    • Aaron Brice's avatar
      spi: fsl-dspi: Add ~50ns delay between cs and sck · 95bf15f3
      Aaron Brice authored
      Add delay between chip select and clock signals, before clock starts and
      after clock stops.
      Signed-off-by: default avatarAaron Brice <aaron.brice@datasoft.com>
      Signed-off-by: default avatarMark Brown <broonie@kernel.org>
      95bf15f3
    • Aaron Brice's avatar
      spi: fsl-dspi: Add cs-sck delays · c1c14957
      Aaron Brice authored
      Adding fsl,spi-cs-sck-delay and fsl,spi-sck-cs-delay properties to
      support delays before and after starting the clock in a transfer.
      Signed-off-by: default avatarAaron Brice <aaron.brice@datasoft.com>
      Signed-off-by: default avatarMark Brown <broonie@kernel.org>
      c1c14957
    • Aaron Brice's avatar
      spi: fsl-dspi: Fix clock rate scale values · e689d6df
      Aaron Brice authored
      Previous algorithm had an outer loop with the values {2,3,5,7} and an
      inner loop with {2,4,6,8,16,32,...,32768}, and would pick the first
      value over the required scaling value (where the total scale was the two
      numbers multiplied).
      
      Since the inner loop went up to 32768 it would always pick a value of 2
      for PBR and a much higher than necessary value for BR.  The desired
      scale factor was being divided by two I believe to compensate for the
      much higher scale factors (the divide by two not specified in the
      reference manual).
      
      Updated to check all values and find the smallest scale factor possible
      without going over the desired clock rate.
      Signed-off-by: default avatarAaron Brice <aaron.brice@datasoft.com>
      Signed-off-by: default avatarMark Brown <broonie@kernel.org>
      e689d6df
    • Dan Carpenter's avatar
      spi: signedness bug in qspi_trigger_transfer_out_int() · c9bc3e8b
      Dan Carpenter authored
      We need "ret" to be unsigned for the error handling to work.  The
      signedness of "i" and "n" don't matter but qspi_set_send_trigger()
      returns an int so I've changed them to int as well.
      
      Fixes: 4b6fe3ed ('spi: Using Trigger number to transmit/receive data')
      Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
      Signed-off-by: default avatarMark Brown <broonie@kernel.org>
      c9bc3e8b
  6. 05 Apr, 2015 3 commits
  7. 04 Apr, 2015 3 commits
    • Linus Torvalds's avatar
      Merge tag 'usb-4.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb · f8b3d8a5
      Linus Torvalds authored
      Pull USB fixes from Greg KH:
       "Here are some small USB fixes and new device ids for 4.0-rc6.  Nothing
        major, some xhci fixes for reported problems, and some usb-serial
        device ids.
      
        All have been in linux-next for a while"
      
      * tag 'usb-4.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
        USB: ftdi_sio: Use jtag quirk for SNAP Connect E10
        usb: isp1760: fix spin unlock in the error path of isp1760_udc_start
        usb: xhci: apply XHCI_AVOID_BEI quirk to all Intel xHCI controllers
        usb: xhci: handle Config Error Change (CEC) in xhci driver
        USB: keyspan_pda: add new device id
        USB: ftdi_sio: Added custom PID for Synapse Wireless product
      f8b3d8a5
    • Linus Torvalds's avatar
      Merge tag 'staging-4.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging · 8eb6dcf9
      Linus Torvalds authored
      Pull staging driver fixes from Greg KH:
       "Here are some staging driver fixes, well, really all just IIO driver
        fixes, for 4.0-rc6.  They fix issues that have been reported with
        these drivers.
      
        All of these patches have been in linux-next for a while"
      
      * tag 'staging-4.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
        iio: imu: Use iio_trigger_get for indio_dev->trig assignment
        iio: adc: vf610: use ADC clock within specification
        iio/adc/cc10001_adc.c: Fix !HAS_IOMEM build
        iio: core: Fix double free.
        iio:inv-mpu6050: Fix inconsistency for the scale channel
        staging: iio: dummy: Fix undefined symbol build error
        iio: inv_mpu6050: Clear timestamps fifo while resetting hardware fifo
        staging: iio: hmc5843: Set iio name property in sysfs
        iio: bmc150: change sampling frequency
        iio: fix drivers that check buffer->scan_mask
      8eb6dcf9
    • Linus Torvalds's avatar
      Merge tag 'tty-4.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty · eca8258b
      Linus Torvalds authored
      Pull tty/serial fixes from Greg KH:
       "Here are 3 serial driver fixes for 4.0-rc6.  They fix some reported
        issues with the samsung and fsl_lpuart drivers.
      
        All have been in linux-next for a while"
      
      * tag 'tty-4.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
        tty: serial: fsl_lpuart: clear receive flag on FIFO flush
        tty: serial: fsl_lpuart: specify transmit FIFO size
        serial: samsung: Clear operation mode on UART shutdown
      eca8258b