1. 05 Aug, 2016 35 commits
    • Linus Torvalds's avatar
      Merge tag 'ntb-4.8' of git://github.com/jonmason/ntb · 32199ec3
      Linus Torvalds authored
      Pull NTB updates from Jon Mason:
       "NTB bug fixes for the ntb_tool and ntb_perf, and improvements to the
        ntb_perf and ntb_pingpong for increased debugability.
      
        Also, modification to the ntb_transport layer to increase/decrease
        the number of transport entries depending on the ring size"
      
      * tag 'ntb-4.8' of git://github.com/jonmason/ntb:
        NTB: ntb_hw_intel: use local variable pdev
        NTB: ntb_hw_intel: show BAR size in debugfs info
        ntb_test: Add a selftest script for the NTB subsystem
        ntb_perf: clear link_is_up flag when the link goes down.
        ntb_pingpong: Add a debugfs file to get the ping count
        ntb_tool: Add link status and files to debugfs
        ntb_tool: Postpone memory window initialization for the user
        ntb_perf: Wait for link before running test
        ntb_perf: Return results by reading the run file
        ntb_perf: Improve thread handling to increase robustness
        ntb_perf: Schedule based on time not on performance
        ntb_transport: Check the number of spads the hardware supports
        ntb_tool: Add memory window debug support
        ntb_perf: Allow limiting the size of the memory windows
        NTB: allocate number transport entries depending on size of ring size
        ntb_tool: BUG: Ensure the buffer size is large enough to return all spads
        ntb_tool: Fix infinite loop bug when writing spad/peer_spad file
      32199ec3
    • Linus Torvalds's avatar
      Merge tag 'pstore-v4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux · a02040d8
      Linus Torvalds authored
      Pull pstore fixes from Kees Cook:
       "Fixes for pstore ramoops driver to catch bad kfree() and to use better
        DT bindings"
      
      * tag 'pstore-v4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
        ramoops: use persistent_ram_free() instead of kfree() for freeing prz
        ramoops: use DT reserved-memory bindings
      a02040d8
    • Linus Torvalds's avatar
      Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi · 0603006b
      Linus Torvalds authored
      Pull SCSI fixes from James Bottomley:
       "This is seven basic fixes (plus one MAINTAINER update) which came in
        close to the merge window"
      
      * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
        ipr: Fix error return code in ipr_probe_ioa()
        fcoe: add missing destroy_workqueue() on error in fcoe_init()
        lpfc: Fix possible NULL pointer dereference
        fcoe: Use default VLAN for FIP VLAN discovery
        ipr: Wait to do async scan until scsi host is initialized
        MAINTAINERS: Update cxlflash maintainers
        cxlflash: Verify problem state area is mapped before notifying shutdown
        lpfc: fix oops in lpfc_sli4_scmd_to_wqidx_distr() from lpfc_send_taskmgmt()
      0603006b
    • Linus Torvalds's avatar
      Merge tag 'dm-4.8-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm · d268675c
      Linus Torvalds authored
      Pull device mapper fixes from Mike Snitzer:
      
       - a stable dm-flakey fix to error read IO during the 'down_interval'
      
       - a DM core suspend fix to establish the SUSPENDED flag before dropping
         the SUSPENDING flag
      
       - a blk-mq request-based DM (dm-mq) dm_stop_queue() fix to properly
         stop the blk-mq hw_queues (and cancel pending requeue work); also
         set/clear QUEUE_FLAG_STOPPED when stopping/starting the dm-mq
         request_queue.
      
       - a DM multipath fix to harden locking of in-core state flags in the
         face of concurrent access while handling path failures under heavy
         IO.
      
       - a few small DM raid fixes to edge cases caught with further testing.
      
      * tag 'dm-4.8-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
        dm raid: fix use of wrong status char during resynchronization
        dm raid: constructor fails on non-zero incompat_features
        dm raid: fix processing of max_recovery_rate constructor flag
        dm: set DMF_SUSPENDED* _before_ clearing DMF_NOFLUSH_SUSPENDING
        dm rq: fix the starting and stopping of blk-mq queues
        dm mpath: add locking to multipath_resume and must_push_back
        dm flakey: error READ bios during the down_interval
      d268675c
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.dk/linux-block · fff648da
      Linus Torvalds authored
      Pull block fixes from Jens Axboe:
       "Here's the second round of block updates for this merge window.
      
        It's a mix of fixes for changes that went in previously in this round,
        and fixes in general.  This pull request contains:
      
         - Fixes for loop from Christoph
      
         - A bdi vs gendisk lifetime fix from Dan, worth two cookies.
      
         - A blk-mq timeout fix, when on frozen queues.  From Gabriel.
      
         - Writeback fix from Jan, ensuring that __writeback_single_inode()
           does the right thing.
      
         - Fix for bio->bi_rw usage in f2fs from me.
      
         - Error path deadlock fix in blk-mq sysfs registration from me.
      
         - Floppy O_ACCMODE fix from Jiri.
      
         - Fix to the new bio op methods from Mike.
      
           One more followup will be coming here, ensuring that we don't
           propagate the block types outside of block.  That, and a rename of
           bio->bi_rw is coming right after -rc1 is cut.
      
         - Various little fixes"
      
      * 'for-linus' of git://git.kernel.dk/linux-block:
        mm/block: convert rw_page users to bio op use
        loop: make do_req_filebacked more robust
        loop: don't try to use AIO for discards
        blk-mq: fix deadlock in blk_mq_register_disk() error path
        Include: blkdev: Removed duplicate 'struct request;' declaration.
        Fixup direct bi_rw modifiers
        block: fix bdi vs gendisk lifetime mismatch
        blk-mq: Allow timeouts to run while queue is freezing
        nbd: fix race in ioctl
        block: fix use-after-free in seq file
        f2fs: drop bio->bi_rw manual assignment
        block: add missing group association in bio-cloning functions
        blkcg: kill unused field nr_undestroyed_grps
        writeback: Write dirty times for WB_SYNC_ALL writeback
        floppy: fix open(O_ACCMODE) for ioctl-only open
      fff648da
    • Linus Torvalds's avatar
      Merge tag 'pnp-extra-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · 62e6e9ba
      Linus Torvalds authored
      Pull PNP fix from Rafael Wysocki:
       "This fixes build errors due to a missing header file inclusion in
        drivers/pnp/pnpbios/core.c (Randy Dunlap)"
      
      * tag 'pnp-extra-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
        PNP: pnpbios: add header file to fix build errors
      62e6e9ba
    • Linus Torvalds's avatar
      Merge tag 'acpi-extra-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · 0524b422
      Linus Torvalds authored
      Pull more ACPI updates from Rafael Wysocki:
       "Two more fixes in ACPI drivers, one in the ACPI EC driver
        (stable-candidate) and one in the ACPI button driver.
      
        Specifics:
      
         - An ACPI EC driver fix from the 4.3 cycle may cause the ACPICA's
           method reentrancy limit to be exceeded for a _Qxx method due to a
           large number of concurrent EC operations, so prevent that from
           happening by moving the EC handling into a separate workqueue with
           a limit on the number of concurrently executed work items (Lv
           Zheng)
      
         - Fix the cleanup code in the ACPI button driver that forgets to
           clear two variables on exit which causes an error to occur on the
           next attmpt to load the driver (Benjamin Tissoires)"
      
      * tag 'acpi-extra-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
        ACPI / EC: Work around method reentrancy limit in ACPICA for _Qxx
        ACPI / button: remove pointer to old lid_sysfs on unbind
      0524b422
    • Linus Torvalds's avatar
      Merge tag 'pm-extra-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · 11d8ec40
      Linus Torvalds authored
      Pull more power management updates from Rafael Wysocki:
       "A few more fixes and cleanups in the x86-64 low-level hibernation
        code, PM core, cpufreq (Kconfig and intel_pstate), and the operating
        points framework.
      
        Specifics:
      
         - Prevent the low-level assembly hibernate code on x86-64 from
           referring to __PAGE_OFFSET directly as a symbol which doesn't work
           when the kernel identity mapping base is randomized, in which case
           __PAGE_OFFSET is a variable (Rafael Wysocki).
      
         - Avoid selecting CPU_FREQ_STAT by default as the statistics are not
           required for proper cpufreq operation (Borislav Petkov).
      
         - Add Skylake-X and Broadwell-X IDs to the intel_pstate's list of
           processors where out-of-band (OBB) control of P-states is possible
           and if that is in use, intel_pstate should not attempt to manage
           P-states (Srinivas Pandruvada).
      
         - Drop some unnecessary checks from the wakeup IRQ handling code in
           the PM core (Markus Elfring).
      
         - Reduce the number operating performance point (OPP) lookups in one
           of the OPP framework's helper functions (Jisheng Zhang)"
      
      * tag 'pm-extra-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
        x86/power/64: Do not refer to __PAGE_OFFSET from assembly code
        cpufreq: Do not default-yes CPU_FREQ_STAT
        cpufreq: intel_pstate: Add more out-of-band IDs
        PM / OPP: optimize dev_pm_opp_set_rate() performance a bit
        PM-wakeup: Delete unnecessary checks before three function calls
      11d8ec40
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input · 39fada55
      Linus Torvalds authored
      Pull more input updates from Dmitry Torokhov:
       "Two new drivers for touchscreen controllers:
      
         - Silead touchscreen controllers
         - SiS 9200 family touchscreen controllers
      
        and a few driver fixes"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
        Input: silead - remove some dead code
        Input: sis-i2c - select CONFIG_CRC_ITU_T
        Input: add driver for SiS 9200 family I2C touchscreen controllers
        Input: ili210x - fix permissions on "calibrate" attribute
        Input: elan_i2c - properly wake up touchpad on ASUS laptops
        Input: add driver for Silead touchscreens
        Input: elantech - fix debug dump of the current packet
        Input: rotary_encoder - support binary encoding of states
        Input: xpad - power off wireless 360 controllers on suspend
        Input: i8042 - break load dependency between atkbd/psmouse and i8042
        Input: synaptics-rmi4 - do not check for NULL when calling of_node_put()
        Input: cros_ec_keyb - cleanup use of dev
      39fada55
    • Linus Torvalds's avatar
      Merge tag 'usb-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb · f72035fa
      Linus Torvalds authored
      Pull more USB updates from Greg KH:
       "Here are a few more straggler patches for USB for 4.8-rc1.
      
        Most of these are for the usb-serial driver tree.  All of those have
        been in linux-next for a long time, but missed my previous pull
        request to you.
      
        The remaining change is to fix up a staging tree build error, due to
        some USB gadget driver changes that went in.  I put it in this tree as
        it was for a USB driver and people are reporting the build error on
        your tree.
      
        All of these have been in linux-next for this week, and longer for the
        usb-serial changes"
      
      * tag 'usb-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
        staging: emxx_udc: allow modular build
        USB: serial: use variable for status
        USB: serial: option: add support for Telit LE910 PID 0x1206
        USB: serial: cp210x: use kmemdup
        USB: serial: ti_usb_3410_5052: use functions rather than macros
        USB: serial: ti_usb_3410_5052: remove ti_usb_3410_5052.h
        USB: serial: ti_usb_3410_5052: use __packed
        USB: serial: ti_usb_3410_5052: remove useless comments
      f72035fa
    • Hiraku Toyooka's avatar
      ramoops: use persistent_ram_free() instead of kfree() for freeing prz · e976e564
      Hiraku Toyooka authored
      persistent_ram_zone(=prz) structures are allocated by persistent_ram_new(),
      which includes vmap() or ioremap(). But they are currently freed by
      kfree(). This uses persistent_ram_free() for correct this asymmetry usage.
      Signed-off-by: default avatarHiraku Toyooka <hiraku.toyooka.gu@hitachi.com>
      Signed-off-by: default avatarNobuhiro Iwamatsu <nobuhiro.iwamatsu.kw@hitachi.com>
      Cc: Mark Salyzyn <salyzyn@android.com>
      Cc: Seiji Aguchi <seiji.aguchi.tr@hitachi.com>
      Signed-off-by: default avatarKees Cook <keescook@chromium.org>
      e976e564
    • Kees Cook's avatar
      ramoops: use DT reserved-memory bindings · 529182e2
      Kees Cook authored
      Instead of a ramoops-specific node, use a child node of /reserved-memory.
      This requires that of_platform_device_create() be explicitly called
      for the node, though, since "/reserved-memory" does not have its own
      "compatible" property.
      Suggested-by: default avatarRob Herring <robh@kernel.org>
      Signed-off-by: default avatarKees Cook <keescook@chromium.org>
      Acked-by: default avatarRob Herring <robh@kernel.org>
      529182e2
    • Allen Hubbe's avatar
      NTB: ntb_hw_intel: use local variable pdev · 95f1464f
      Allen Hubbe authored
      Clean up duplicated expression by replacing it with the equivalent local
      variable pdev.
      Signed-off-by: default avatarAllen Hubbe <Allen.Hubbe@emc.com>
      Acked-by: default avatarDave Jiang <dave.jiang@intel.com>
      Signed-off-by: default avatarJon Mason <jdmason@kudzu.us>
      95f1464f
    • Allen Hubbe's avatar
      NTB: ntb_hw_intel: show BAR size in debugfs info · 40895273
      Allen Hubbe authored
      It will be useful to know the hardware configured BAR size to diagnose
      issues with NTB memory windows.
      Signed-off-by: default avatarAllen Hubbe <Allen.Hubbe@emc.com>
      Acked-by: default avatarDave Jiang <dave.jiang@intel.com>
      Signed-off-by: default avatarJon Mason <jdmason@kudzu.us>
      40895273
    • Logan Gunthorpe's avatar
      ntb_test: Add a selftest script for the NTB subsystem · a9c59ef7
      Logan Gunthorpe authored
      This script automates testing doorbells, scratchpads and memory windows
      for an NTB device. It can be run locally, with the NTB looped
      back to the same host or use SSH to remotely control the second host.
      
      In the single host case, the script just needs to be passed two
      arguments: a PCI ID for each side of the link. In the two host case
      the -r option must be used to specify the remote hostname (which must
      be SSH accessible and should probably have ssh-keys exchanged).
      
      A sample run looks like this:
      
      $ sudo ./ntb_test.sh 0000:03:00.1 0000:83:00.1 -p 29
      Starting ntb_tool tests...
      Running link tests on: 0000:03:00.1 / 0000:83:00.1
        Passed
      Running link tests on: 0000:83:00.1 / 0000:03:00.1
        Passed
      Running db tests on: 0000:03:00.1 / 0000:83:00.1
        Passed
      Running db tests on: 0000:83:00.1 / 0000:03:00.1
        Passed
      Running spad tests on: 0000:03:00.1 / 0000:83:00.1
        Passed
      Running spad tests on: 0000:83:00.1 / 0000:03:00.1
        Passed
      Running mw0 tests on: 0000:03:00.1 / 0000:83:00.1
        Passed
      Running mw0 tests on: 0000:83:00.1 / 0000:03:00.1
        Passed
      Running mw1 tests on: 0000:03:00.1 / 0000:83:00.1
        Passed
      Running mw1 tests on: 0000:83:00.1 / 0000:03:00.1
        Passed
      
      Starting ntb_pingpong tests...
      Running ping pong tests on: 0000:03:00.1 / 0000:83:00.1
        Passed
      
      Starting ntb_perf tests...
      Running local perf test without DMA
        0: copied 536870912 bytes in 164453 usecs, 3264 MBytes/s
        Passed
      Running remote perf test without DMA
        0: copied 536870912 bytes in 164453 usecs, 3264 MBytes/s
        Passed
      Signed-off-by: default avatarLogan Gunthorpe <logang@deltatee.com>
      Acked-by: default avatarShuah Khan <shuahkh@osg.samsung.com>
      Acked-by: default avatarAllen Hubbe <Allen.Hubbe@emc.com>
      Signed-off-by: default avatarJon Mason <jdmason@kudzu.us>
      a9c59ef7
    • Logan Gunthorpe's avatar
      ntb_perf: clear link_is_up flag when the link goes down. · 35539b54
      Logan Gunthorpe authored
      When the link goes down, the link_is_up flag did not return to
      false. This could have caused some subtle corner case bugs
      when the link goes up and down quickly.
      
      Once that was fixed, there was found to be a race if the link was
      brought down then immediately up. The link_cleanup work would
      occasionally be scheduled after the next link up event. This would
      cancel the link_work that was supposed to occur and leave ntb_perf
      in an unusable state.
      
      To fix this we get rid of the link_cleanup work and put the actions
      directly in the link_down event.
      Signed-off-by: default avatarLogan Gunthorpe <logang@deltatee.com>
      Acked-by: default avatarDave Jiang <dave.jiang@intel.com>
      Signed-off-by: default avatarJon Mason <jdmason@kudzu.us>
      35539b54
    • Logan Gunthorpe's avatar
      ntb_pingpong: Add a debugfs file to get the ping count · 20572ee1
      Logan Gunthorpe authored
      This commit adds a debugfs 'count' file to ntb_pingpong. This is so
      testing with ntb_pingpong can be automated beyond just checking the
      logs for pong messages.
      
      The count file returns a number which increments every pong. The
      counter can be cleared by writing a zero.
      Signed-off-by: default avatarLogan Gunthorpe <logang@deltatee.com>
      Acked-by: default avatarAllen Hubbe <Allen.Hubbe@emc.com>
      Signed-off-by: default avatarJon Mason <jdmason@kudzu.us>
      20572ee1
    • Logan Gunthorpe's avatar
      ntb_tool: Add link status and files to debugfs · bfcaa396
      Logan Gunthorpe authored
      In order to more successfully script with ntb_tool it's useful to
      have a link file to check the link status so that the script
      doesn't use the other files until the link is up.
      
      This commit adds a 'link' file to the debugfs directory which reads
      boolean (Y or N) depending on the link status. Writing to the file
      change the link state using ntb_link_enable or ntb_link_disable.
      
      A 'link_event' file is also provided so an application can block until
      the link changes to the desired state. If the user writes a 1, it will
      block until the link is up. If the user writes a 0, it will block until
      the link is down.
      Signed-off-by: default avatarLogan Gunthorpe <logang@deltatee.com>
      Acked-by: default avatarAllen Hubbe <Allen.Hubbe@emc.com>
      Signed-off-by: default avatarJon Mason <jdmason@kudzu.us>
      bfcaa396
    • Logan Gunthorpe's avatar
      ntb_tool: Postpone memory window initialization for the user · 717146a2
      Logan Gunthorpe authored
      In order to make the interface closer to the raw NTB API, this commit
      changes memory windows so they are not initialized on link up.
      Instead, the 'peer_trans*' debugfs files are introduced. When read,
      they return information provided by ntb_mw_get_range. When written,
      they create a buffer and initialize the memory window. The
      value written is taken as the requested size of the buffer (which
      is then rounded for alignment). Writing a value of zero frees the buffer
      and tears down the memory window translation. The 'peer_mw*' file is
      only created once the memory window translation is setup by the user.
      
      Additionally, it was noticed that the read and write functions for the
      'peer_mw*' files should have checked for a NULL pointer.
      Signed-off-by: default avatarLogan Gunthorpe <logang@deltatee.com>
      Acked-by: default avatarAllen Hubbe <Allen.Hubbe@emc.com>
      Signed-off-by: default avatarJon Mason <jdmason@kudzu.us>
      717146a2
    • Logan Gunthorpe's avatar
      ntb_perf: Wait for link before running test · 26dc638a
      Logan Gunthorpe authored
      Instead of returning immediately with an error when the link is
      down, wait for the link to come up (or the user sends a SIGINT).
      
      This is to make scripting ntb_perf easier.
      Signed-off-by: default avatarLogan Gunthorpe <logang@deltatee.com>
      Acked-by: default avatarDave Jiang <dave.jiang@intel.com>
      Signed-off-by: default avatarJon Mason <jdmason@kudzu.us>
      26dc638a
    • Logan Gunthorpe's avatar
      ntb_perf: Return results by reading the run file · 58fd0f3b
      Logan Gunthorpe authored
      Instead of having to watch logs, allow the results to be retrieved
      by reading back the run file. This file will return "running" when
      the test is running and nothing if no tests have been run yet.
      It returns 1 line per thread, and will display an error message if the
      corresponding thread returns an error.
      
      With the above change, the pr_info calls that returned the results are
      then changed to pr_debug calls.
      Signed-off-by: default avatarLogan Gunthorpe <logang@deltatee.com>
      Acked-by: default avatarDave Jiang <dave.jiang@intel.com>
      Signed-off-by: default avatarJon Mason <jdmason@kudzu.us>
      58fd0f3b
    • Logan Gunthorpe's avatar
      ntb_perf: Improve thread handling to increase robustness · da573eaa
      Logan Gunthorpe authored
      This commit accomplishes a few things:
      
      1) Properly prevent multiple sets of threads from running at once using
      a mutex. Lots of race issues existed with the thread_cleanup.
      
      2) The mutex allows us to ensure that threads are finished before
      tearing down the device or module.
      
      3) Don't use kthread_stop when the threads can exit by themselves, as
      this is counter-indicated by the kthread_create documentation. Threads
      now wait for kthread_stop to occur.
      
      4) Writing to the run file now blocks until the threads are complete.
      The test can then be safely interrupted by a SIGINT.
      
      Also, while I was at it:
      
      5) debugfs_run_write shouldn't return 0 in the early check cases as this
      could cause debugfs_run_write to loop undesirably.
      Signed-off-by: default avatarLogan Gunthorpe <logang@deltatee.com>
      Acked-by: default avatarDave Jiang <dave.jiang@intel.com>
      Signed-off-by: default avatarJon Mason <jdmason@kudzu.us>
      da573eaa
    • Logan Gunthorpe's avatar
      ntb_perf: Schedule based on time not on performance · fd2ecd88
      Logan Gunthorpe authored
      When debugging performance problems, if some issue causes the ntb
      hardware to be significantly slower than expected, ntb_perf will
      hang requiring a reboot because it only schedules once every 4GB.
      
      Instead, schedule based on jiffies so it will not hang the CPU if
      the transfer is slow.
      Signed-off-by: default avatarLogan Gunthorpe <logang@deltatee.com>
      Acked-by: default avatarDave Jiang <dave.jiang@intel.com>
      Signed-off-by: default avatarJon Mason <jdmason@kudzu.us>
      fd2ecd88
    • Logan Gunthorpe's avatar
      ntb_transport: Check the number of spads the hardware supports · 19645a07
      Logan Gunthorpe authored
      I'm working on hardware that currently has a limited number of
      scratchpad registers and ntb_ndev fails with no clue as to why. I
      feel it is better to fail early and provide a reasonable error message
      then to fail later on.
      
      The same is done to ntb_perf, but it doesn't currently require enough
      spads to actually fail. I've also removed the unused SPAD_MSG and
      SPAD_ACK enums so that MAX_SPAD accurately reflects the number of
      spads used.
      Signed-off-by: default avatarLogan Gunthorpe <logang@deltatee.com>
      Acked-by: default avatarDave Jiang <dave.jiang@intel.com>
      Signed-off-by: default avatarJon Mason <jdmason@kudzu.us>
      19645a07
    • Logan Gunthorpe's avatar
      ntb_tool: Add memory window debug support · 8b71d285
      Logan Gunthorpe authored
      We allocate some memory window buffers when the link comes up, then we
      provide debugfs files to read/write each side of the link.
      
      This is useful for debugging the mapping when writing new drivers.
      Signed-off-by: default avatarLogan Gunthorpe <logang@deltatee.com>
      Acked-by: default avatarAllen Hubbe <Allen.Hubbe@emc.com>
      Signed-off-by: default avatarJon Mason <jdmason@kudzu.us>
      8b71d285
    • Logan Gunthorpe's avatar
      ntb_perf: Allow limiting the size of the memory windows · 4aae9777
      Logan Gunthorpe authored
      On my system, dma_alloc_coherent won't produce memory anywhere
      near the size of the BAR. So I needed a way to limit this.
      
      It's pretty much copied straight from ntb_transport.
      Signed-off-by: default avatarLogan Gunthorpe <logang@deltatee.com>
      Acked-by: default avatarDave Jiang <dave.jiang@intel.com>
      Signed-off-by: default avatarJon Mason <jdmason@kudzu.us>
      4aae9777
    • Dave Jiang's avatar
      NTB: allocate number transport entries depending on size of ring size · a754a8fc
      Dave Jiang authored
      Currently we only allocate a fixed default number of descriptors for the tx
      and rx side. We should dynamically resize it to the number of descriptors
      resides in the transport rings. We should know the number of transmit
      descriptors at initializaiton. We will allocate the default number of
      descriptors for receive side and allocate additional ones when we know the
      actual max entries for receive.
      Signed-off-by: default avatarDave Jiang <dave.jiang@intel.com>
      Acked-by: default avatarAllen Hubbe <allen.hubbe@emc.com>
      Signed-off-by: default avatarJon Mason <jdmason@kudzu.us>
      a754a8fc
    • Logan Gunthorpe's avatar
      ntb_tool: BUG: Ensure the buffer size is large enough to return all spads · 625f0802
      Logan Gunthorpe authored
      On hardware with 32 scratchpad registers the spad field in ntb tool
      could chop off the end. The maximum buffer size is increased from
      256 to 15 times the number or scratchpads.
      Signed-off-by: default avatarLogan Gunthorpe <logang@deltatee.com>
      Acked-by: default avatarAllen Hubbe <Allen.Hubbe@emc.com>
      Signed-off-by: default avatarJon Mason <jdmason@kudzu.us>
      625f0802
    • Logan Gunthorpe's avatar
      ntb_tool: Fix infinite loop bug when writing spad/peer_spad file · c792eba1
      Logan Gunthorpe authored
      If you tried to write two spads in one line, as per the example:
      
      root@peer# echo '0 0x01010101 1 0x7f7f7f7f' > $DBG_DIR/peer_spad
      
      then the CPU would freeze in an infinite loop.
      
      This wasn't immediately obvious but 'pos' was not incrementing the
      buffer, so after reading the second pair of values, 'pos' would once
      again be 3 and it would re-read the second pair of values ad infinitum.
      Signed-off-by: default avatarLogan Gunthorpe <logang@deltatee.com>
      Acked-by: default avatarAllen Hubbe <Allen.Hubbe@emc.com>
      Signed-off-by: default avatarJon Mason <jdmason@kudzu.us>
      c792eba1
    • Rafael J. Wysocki's avatar
      Merge branches 'acpi-ec' and 'acpi-button' · 4dc14b34
      Rafael J. Wysocki authored
      * acpi-ec:
        ACPI / EC: Work around method reentrancy limit in ACPICA for _Qxx
      
      * acpi-button:
        ACPI / button: remove pointer to old lid_sysfs on unbind
      4dc14b34
    • Linus Torvalds's avatar
      Merge tag 'rtc-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux · 6c84239d
      Linus Torvalds authored
      Pull RTC updates from Alexandre Belloni:
       "RTC for 4.8
      
        Cleanups:
         - huge cleanup of rtc-generic and char/genrtc this allowed to cleanup
           rtc-cmos, rtc-sh, rtc-m68k, rtc-powerpc and rtc-parisc
         - move mn10300 to rtc-cmos
      
        Subsystem:
         - fix wakealarms after hibernate
         - multiples fixes for rctest
         - simplify implementations of .read_alarm
      
        New drivers:
         - Maxim MAX6916
      
        Drivers:
         - ds1307: fix weekday
         - m41t80: add wakeup support
         - pcf85063: add support for PCF85063A variant
         - rv8803: extend i2c fix and other fixes
         - s35390a: fix alarm reading, this fixes instant reboot after
           shutdown for QNAP TS-41x
         - s3c: clock fixes"
      
      * tag 'rtc-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (65 commits)
        rtc: rv8803: Clear V1F when setting the time
        rtc: rv8803: Stop the clock while setting the time
        rtc: rv8803: Always apply the I²C workaround
        rtc: rv8803: Fix read day of week
        rtc: rv8803: Remove the check for valid time
        rtc: rv8803: Kconfig: Indicate rx8900 support
        rtc: asm9260: remove .owner field for driver
        rtc: at91sam9: Fix missing spin_lock_init()
        rtc: m41t80: add suspend handlers for alarm IRQ
        rtc: m41t80: make it a real error message
        rtc: pcf85063: Add support for the PCF85063A device
        rtc: pcf85063: fix year range
        rtc: hym8563: in .read_alarm set .tm_sec to 0 to signal minute accuracy
        rtc: explicitly set tm_sec = 0 for drivers with minute accurancy
        rtc: s3c: Add s3c_rtc_{enable/disable}_clk in s3c_rtc_setfreq()
        rtc: s3c: Remove unnecessary call to disable already disabled clock
        rtc: abx80x: use devm_add_action_or_reset()
        rtc: m41t80: use devm_add_action_or_reset()
        rtc: fix a typo and reduce three empty lines to one
        rtc: s35390a: improve two comments in .set_alarm
        ...
      6c84239d
    • Rafael J. Wysocki's avatar
      Merge branches 'pm-sleep', 'pm-cpufreq', 'pm-core' and 'pm-opp' · e2b3b80d
      Rafael J. Wysocki authored
      * pm-sleep:
        x86/power/64: Do not refer to __PAGE_OFFSET from assembly code
      
      * pm-cpufreq:
        cpufreq: Do not default-yes CPU_FREQ_STAT
        cpufreq: intel_pstate: Add more out-of-band IDs
      
      * pm-core:
        PM-wakeup: Delete unnecessary checks before three function calls
      
      * pm-opp:
        PM / OPP: optimize dev_pm_opp_set_rate() performance a bit
      e2b3b80d
    • Linus Torvalds's avatar
      Merge tag 'sound-fix-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound · d4c06c70
      Linus Torvalds authored
      Pull sound fixes from Takashi Iwai:
       "Nothing existing here: as usual a few HD-audio fixes (device fixups, a
        new AMD PCI ID, and a fix for krealloc() usage), in addition to a fix
        in Kconfig for legacy arm drivers"
      
      * tag 'sound-fix-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
        ALSA: hda - Fix headset mic detection problem for two dell machines
        ALSA: hda: Fix krealloc() with __GFP_ZERO usage
        ALSA: hda: add AMD Bonaire AZ PCI ID with proper driver caps
        ALSA: arm: Fix empty menuconfig SND_ARM
        ALSA: hda - On-board speaker fixup on ACER Veriton
        ALSA: hda/realtek - Can't adjust speaker's volume on a Dell AIO
      d4c06c70
    • Linus Torvalds's avatar
      Merge tag 'powerpc-4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux · 2cfd716d
      Linus Torvalds authored
      Pull more powerpc updates from Michael Ellerman:
       "These were delayed for various reasons, so I let them sit in next a
        bit longer, rather than including them in my first pull request.
      
        Fixes:
         - Fix early access to cpu_spec relocation from Benjamin Herrenschmidt
         - Fix incorrect event codes in power9-event-list from Madhavan Srinivasan
         - Move register_process_table() out of ppc_md from Michael Ellerman
      
        Use jump_label use for [cpu|mmu]_has_feature():
         - Add mmu_early_init_devtree() from Michael Ellerman
         - Move disable_radix handling into mmu_early_init_devtree() from Michael Ellerman
         - Do hash device tree scanning earlier from Michael Ellerman
         - Do radix device tree scanning earlier from Michael Ellerman
         - Do feature patching before MMU init from Michael Ellerman
         - Check features don't change after patching from Michael Ellerman
         - Make MMU_FTR_RADIX a MMU family feature from Aneesh Kumar K.V
         - Convert mmu_has_feature() to returning bool from Michael Ellerman
         - Convert cpu_has_feature() to returning bool from Michael Ellerman
         - Define radix_enabled() in one place & use static inline from Michael Ellerman
         - Add early_[cpu|mmu]_has_feature() from Michael Ellerman
         - Convert early cpu/mmu feature check to use the new helpers from Aneesh Kumar K.V
         - jump_label: Make it possible for arches to invoke jump_label_init() earlier from Kevin Hao
         - Call jump_label_init() in apply_feature_fixups() from Aneesh Kumar K.V
         - Remove mfvtb() from Kevin Hao
         - Move cpu_has_feature() to a separate file from Kevin Hao
         - Add kconfig option to use jump labels for cpu/mmu_has_feature() from Michael Ellerman
         - Add option to use jump label for cpu_has_feature() from Kevin Hao
         - Add option to use jump label for mmu_has_feature() from Kevin Hao
         - Catch usage of cpu/mmu_has_feature() before jump label init from Aneesh Kumar K.V
         - Annotate jump label assembly from Michael Ellerman
      
        TLB flush enhancements from Aneesh Kumar K.V:
         - radix: Implement tlb mmu gather flush efficiently
         - Add helper for finding SLBE LLP encoding
         - Use hugetlb flush functions
         - Drop multiple definition of mm_is_core_local
         - radix: Add tlb flush of THP ptes
         - radix: Rename function and drop unused arg
         - radix/hugetlb: Add helper for finding page size
         - hugetlb: Add flush_hugetlb_tlb_range
         - remove flush_tlb_page_nohash
      
        Add new ptrace regsets from Anshuman Khandual and Simon Guo:
         - elf: Add powerpc specific core note sections
         - Add the function flush_tmregs_to_thread
         - Enable in transaction NT_PRFPREG ptrace requests
         - Enable in transaction NT_PPC_VMX ptrace requests
         - Enable in transaction NT_PPC_VSX ptrace requests
         - Adapt gpr32_get, gpr32_set functions for transaction
         - Enable support for NT_PPC_CGPR
         - Enable support for NT_PPC_CFPR
         - Enable support for NT_PPC_CVMX
         - Enable support for NT_PPC_CVSX
         - Enable support for TM SPR state
         - Enable NT_PPC_TM_CTAR, NT_PPC_TM_CPPR, NT_PPC_TM_CDSCR
         - Enable support for NT_PPPC_TAR, NT_PPC_PPR, NT_PPC_DSCR
         - Enable support for EBB registers
         - Enable support for Performance Monitor registers"
      
      * tag 'powerpc-4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (48 commits)
        powerpc/mm: Move register_process_table() out of ppc_md
        powerpc/perf: Fix incorrect event codes in power9-event-list
        powerpc/32: Fix early access to cpu_spec relocation
        powerpc/ptrace: Enable support for Performance Monitor registers
        powerpc/ptrace: Enable support for EBB registers
        powerpc/ptrace: Enable support for NT_PPPC_TAR, NT_PPC_PPR, NT_PPC_DSCR
        powerpc/ptrace: Enable NT_PPC_TM_CTAR, NT_PPC_TM_CPPR, NT_PPC_TM_CDSCR
        powerpc/ptrace: Enable support for TM SPR state
        powerpc/ptrace: Enable support for NT_PPC_CVSX
        powerpc/ptrace: Enable support for NT_PPC_CVMX
        powerpc/ptrace: Enable support for NT_PPC_CFPR
        powerpc/ptrace: Enable support for NT_PPC_CGPR
        powerpc/ptrace: Adapt gpr32_get, gpr32_set functions for transaction
        powerpc/ptrace: Enable in transaction NT_PPC_VSX ptrace requests
        powerpc/ptrace: Enable in transaction NT_PPC_VMX ptrace requests
        powerpc/ptrace: Enable in transaction NT_PRFPREG ptrace requests
        powerpc/process: Add the function flush_tmregs_to_thread
        elf: Add powerpc specific core note sections
        powerpc/mm: remove flush_tlb_page_nohash
        powerpc/mm/hugetlb: Add flush_hugetlb_tlb_range
        ...
      2cfd716d
    • Linus Torvalds's avatar
      Merge tag 'metag-for-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag · 755b20f4
      Linus Torvalds authored
      Pull metag architecture updates from James Hogan:
       "Just a few minor fixes:
      
         - Fix another incorrect inline asm register constraint, which has
           been lying quietly for 5 and a half years before finally causing
           build breakage during this merge window.
      
         - Removal of duplicated KERN_INFO from Joe Perches
      
         - Typo fixes from Andrea Gelmini"
      
      * tag 'metag-for-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag:
        metag: Fix __cmpxchg_u32 asm constraint for CMP
        metag: Remove duplicate KERN_<LEVEL> prefix
        metag: Fix typos
      755b20f4
  2. 04 Aug, 2016 5 commits
    • Rafael J. Wysocki's avatar
      ACPI / hotplug / PCI: Runtime resume bridges before bus rescans · dd7fd3a8
      Rafael J. Wysocki authored
      If a PCI bridge (or PCIe port) that is runtime-suspended gets an ACPI
      hotplug notification, such as a bus check, it has to be resumed before
      re-scanning the devices below it, or those devices will not be
      accessible and will be treated as hot-removed.
      
      Make that happen and let the bridge suspend again after the bus below it
      has been re-scanned.
      
      This is a replacement for commit 16468c78 ("ACPI / hotplug / PCI:
      Runtime resume bridge before rescan") that has been reverted, because it
      introduced a system resume regression (due to missing bridge->pci_dev
      checks that are necessary in case the notification is targeted at the
      host bridge) and it is necessary for the code added by commit
      006d44e4 ("PCI: Add runtime PM support for PCIe ports") to work as
      expected.
      Tested-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      dd7fd3a8
    • Linus Torvalds's avatar
      Merge branch 'akpm' (patches from Andrew) · f8fbd8c4
      Linus Torvalds authored
      Merge misc fixes from Andrew Morton:
       "A few late-breaking fixes"
      
      * emailed patches from Andrew Morton <akpm@linux-foundation.org>:
        mm/memblock.c: fix NULL dereference error
        MAINTAINERS: update cgroup's document path
        slub: drop bogus inline for fixup_red_left()
        powerpc/fsl_rio: fix a missing error code
        mm: initialise per_cpu_nodestats for all online pgdats at boot
        mm/memblock: fix a typo in a comment
        mm: disable CONFIG_MEMORY_HOTPLUG when KASAN is enabled
      f8fbd8c4
    • Linus Torvalds's avatar
      Merge tag 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma · 84e39eeb
      Linus Torvalds authored
      Pull second round of rdma updates from Doug Ledford:
       "This can be split out into just two categories:
      
         - fixes to the RDMA R/W API in regards to SG list length limits
           (about 5 patches)
      
         - fixes/features for the Intel hfi1 driver (everything else)
      
        The hfi1 driver is still being brought to full feature support by
        Intel, and they have a lot of people working on it, so that amounts to
        almost the entirety of this pull request"
      
      * tag 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (84 commits)
        IB/hfi1: Add cache evict LRU list
        IB/hfi1: Fix memory leak during unexpected shutdown
        IB/hfi1: Remove unneeded mm argument in remove function
        IB/hfi1: Consistently call ops->remove outside spinlock
        IB/hfi1: Use evict mmu rb operation
        IB/hfi1: Add evict operation to the mmu rb handler
        IB/hfi1: Fix TID caching actions
        IB/hfi1: Make the cache handler own its rb tree root
        IB/hfi1: Make use of mm consistent
        IB/hfi1: Fix user SDMA racy user request claim
        IB/hfi1: Fix error condition that needs to clean up
        IB/hfi1: Release node on insert failure
        IB/hfi1: Validate SDMA user iovector count
        IB/hfi1: Validate SDMA user request index
        IB/hfi1: Use the same capability state for all shared contexts
        IB/hfi1: Prevent null pointer dereference
        IB/hfi1: Rename TID mmu_rb_* functions
        IB/hfi1: Remove unneeded empty check in hfi1_mmu_rb_unregister()
        IB/hfi1: Restructure hfi1_file_open
        IB/hfi1: Make iovec loop index easy to understand
        ...
      84e39eeb
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma · 0cda6113
      Linus Torvalds authored
      Pull base rdma updates from Doug Ledford:
       "Round one of 4.8 code: while this is mostly normal, there is a new
        driver in here (the driver was hosted outside the kernel for several
        years and is actually a fairly mature and well coded driver).  It
        amounts to 13,000 of the 16,000 lines of added code in here.
      
        Summary:
      
         - Updates/fixes for iw_cxgb4 driver
         - Updates/fixes for mlx5 driver
         - Add flow steering and RSS API
         - Add hardware stats to mlx4 and mlx5 drivers
         - Add firmware version API for RDMA driver use
         - Add the rxe driver (this is a software RoCE driver that makes any
           Ethernet device a RoCE device)
         - Fixes for i40iw driver
         - Support for send only multicast joins in the cma layer
         - Other minor fixes"
      
      * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (72 commits)
        Soft RoCE driver
        IB/core: Support for CMA multicast join flags
        IB/sa: Add cached attribute containing SM information to SA port
        IB/uverbs: Fix race between uverbs_close and remove_one
        IB/mthca: Clean up error unwind flow in mthca_reset()
        IB/mthca: NULL arg to pci_dev_put is OK
        IB/hfi1: NULL arg to sc_return_credits is OK
        IB/mlx4: Add diagnostic hardware counters
        net/mlx4: Query performance and diagnostics counters
        net/mlx4: Add diagnostic counters capability bit
        Use smaller 512 byte messages for portmapper messages
        IB/ipoib: Report SG feature regardless of HW UD CSUM capability
        IB/mlx4: Don't use GFP_ATOMIC for CQ resize struct
        IB/hfi1: Disable by default
        IB/rdmavt: Disable by default
        IB/mlx5: Fix port counter ID association to QP offset
        IB/mlx5: Fix iteration overrun in GSI qps
        i40iw: Add NULL check for puda buffer
        i40iw: Change dup_ack_thresh to u8
        i40iw: Remove unnecessary check for moving CQ head
        ...
      0cda6113
    • Linus Torvalds's avatar
      Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending · fdf1f7ff
      Linus Torvalds authored
      Pull SCSI target updates from Nicholas Bellinger:
       "The most notable item is IBM virtual SCSI target driver, that was
        originally ported to target-core back in 2010 by Tomo-san, and has
        been brought forward to v4.x code by Bryant Ly, Michael Cyr and co
        over the last months.
      
        Also included are two ORDERED task related bug-fixes Bryant + Michael
        found along the way using ibmvscsis with AIX guests, plus a few
        miscellaneous target-core + iscsi-target bug-fixes with associated
        stable tags"
      
      * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
        target: fix spelling mistake: "limitiation" -> "limitation"
        target: Fix residual overflow handling in target_complete_cmd_with_length
        tcm_fc: set and unset FCP_SPPF_TARG_FCN
        iscsi-target: Fix panic when adding second TCP connection to iSCSI session
        ibmvscsis: Initial commit of IBM VSCSI Tgt Driver
        target: Fix ordered task CHECK_CONDITION early exception handling
        target: Fix ordered task target_setup_cmd_from_cdb exception hang
        target: Fix max_unmap_lba_count calc overflow
        target: Fix race between iscsi-target connection shutdown + ABORT_TASK
        target: Fix missing complete during ABORT_TASK + CMD_T_FABRIC_STOP
      fdf1f7ff