Eric Lee / smarc-ti-linux-kernel

12 Dec, 2015

1 commit

  • e46e31a36   parisc iommu: fix panic due to trying to allocate too large region ... Browse Code »

    When using the Promise TX2+ SATA controller on PA-RISC, the system often
    crashes with kernel panic, for example just writing data with the dd
    utility will make it crash.

    Kernel panic - not syncing: drivers/parisc/sba_iommu.c: I/O MMU @ 000000000000a000 is out of mapping resources

    CPU: 0 PID: 18442 Comm: mkspadfs Not tainted 4.4.0-rc2 #2
    Backtrace:
    [] show_stack+0x14/0x20
    [] dump_stack+0x88/0x100
    [] panic+0x124/0x360
    [] sba_alloc_range+0x698/0x6a0
    [] sba_map_sg+0x260/0x5b8
    [] ata_qc_issue+0x264/0x4a8 [libata]
    [] ata_scsi_translate+0xe4/0x220 [libata]
    [] ata_scsi_queuecmd+0xbc/0x320 [libata]
    [] scsi_dispatch_cmd+0xfc/0x130
    [] scsi_request_fn+0x6e4/0x970
    [] __blk_run_queue+0x40/0x60
    [] blk_run_queue+0x3c/0x68
    [] scsi_run_queue+0x2a4/0x360
    [] scsi_end_request+0x1a8/0x238
    [] scsi_io_completion+0xfc/0x688
    [] scsi_finish_command+0x17c/0x1d0

    The cause of the crash is not exhaustion of the IOMMU space, there is
    plenty of free pages. The function sba_alloc_range is called with size
    0x11000, thus the pages_needed variable is 0x11. The function
    sba_search_bitmap is called with bits_wanted 0x11 and boundary size is
    0x10 (because dma_get_seg_boundary(dev) returns 0xffff).

    The function sba_search_bitmap attempts to allocate 17 pages that must not
    cross 16-page boundary - it can't satisfy this requirement
    (iommu_is_span_boundary always returns true) and fails even if there are
    many free entries in the IOMMU space.

    How did it happen that we try to allocate 17 pages that don't cross
    16-page boundary? The cause is in the function iommu_coalesce_chunks. This
    function tries to coalesce adjacent entries in the scatterlist. The
    function does several checks if it may coalesce one entry with the next,
    one of those checks is this:

    if (startsg->length + dma_len > max_seg_size)
    break;

    When it finishes coalescing adjacent entries, it allocates the mapping:

    sg_dma_len(contig_sg) = dma_len;
    dma_len = ALIGN(dma_len + dma_offset, IOVP_SIZE);
    sg_dma_address(contig_sg) =
    PIDE_FLAG
    | (iommu_alloc_range(ioc, dev, dma_len) << IOVP_SHIFT)
    | dma_offset;

    It is possible that (startsg->length + dma_len > max_seg_size) is false
    (we are just near the 0x10000 max_seg_size boundary), so the funcion
    decides to coalesce this entry with the next entry. When the coalescing
    succeeds, the function performs
    dma_len = ALIGN(dma_len + dma_offset, IOVP_SIZE);
    And now, because of non-zero dma_offset, dma_len is greater than 0x10000.
    iommu_alloc_range (a pointer to sba_alloc_range) is called and it attempts
    to allocate 17 pages for a device that must not cross 16-page boundary.

    To fix the bug, we must make sure that dma_len after addition of
    dma_offset and alignment doesn't cross the segment boundary. I.e. change
    if (startsg->length + dma_len > max_seg_size)
    break;
    to
    if (ALIGN(dma_len + dma_offset + startsg->length, IOVP_SIZE) > max_seg_size)
    break;

    This patch makes this change (it precalculates max_seg_boundary at the
    beginning of the function iommu_coalesce_chunks). I also added a check
    that the mapping length doesn't exceed dma_get_seg_boundary(dev) (it is
    not needed for Promise TX2+ SATA, but it may be needed for other devices
    that have dma_get_seg_boundary lower than dma_get_max_seg_size).

    Signed-off-by: Mikulas Patocka
    Cc: stable@vger.kernel.org
    Signed-off-by: Helge Deller

    Mikulas Patocka
     

11 Nov, 2015

1 commit

22 Oct, 2015

1 commit

16 Sep, 2015

1 commit

  • 237865f19   PCI: Revert "PCI: Call pci_read_bridge_bases() from core instead of arch code" ... Browse Code »

    Revert dff22d2054b5 ("PCI: Call pci_read_bridge_bases() from core instead
    of arch code").

    Reading PCI bridge windows is not arch-specific in itself, but there is PCI
    core code that doesn't work correctly if we read them too early. For
    example, Hannes found this case on an ARM Freescale i.mx6 board:

    pci_bus 0000:00: root bus resource [mem 0x01000000-0x01efffff]
    pci 0000:00:00.0: PCI bridge to [bus 01-ff]
    pci 0000:00:00.0: BAR 8: no space for [mem size 0x01000000] (mem window)
    pci 0000:01:00.0: BAR 2: failed to assign [mem size 0x00200000]
    pci 0000:01:00.0: BAR 1: failed to assign [mem size 0x00004000]
    pci 0000:01:00.0: BAR 0: failed to assign [mem size 0x00000100]

    The 00:00.0 mem window needs to be at least 3MB: the 01:00.0 device needs
    0x204100 of space, and mem windows are megabyte-aligned.

    Bus sizing can increase a bridge window size, but never *decrease* it (see
    d65245c3297a ("PCI: don't shrink bridge resources")). Prior to
    dff22d2054b5, ARM didn't read bridge windows at all, so the "original size"
    was zero, and we assigned a 3MB window.

    After dff22d2054b5, we read the bridge windows before sizing the bus. The
    firmware programmed a 16MB window (size 0x01000000) in 00:00.0, and since
    we never decrease the size, we kept 16MB even though we only needed 3MB.
    But 16MB doesn't fit in the host bridge aperture, so we failed to assign
    space for the window and the downstream devices.

    I think this is a defect in the PCI core: we shouldn't rely on the firmware
    to assign sensible windows.

    Ray reported a similar problem, also on ARM, with Broadcom iProc.

    Issues like this are too hard to fix right now, so revert dff22d2054b5.

    Reported-by: Hannes
    Reported-by: Ray Jui
    Link: http://lkml.kernel.org/r/CAAa04yFQEUJm7Jj1qMT57-LG7ZGtnhNDBe=PpSRa70Mj+XhW-A@mail.gmail.com
    Link: http://lkml.kernel.org/r/55F75BB8.4070405@broadcom.com
    Signed-off-by: Bjorn Helgaas
    Acked-by: Yinghai Lu
    Acked-by: Lorenzo Pieralisi

    Bjorn Helgaas
     

11 Sep, 2015

1 commit

  • b342a65dd   parisc: use seq_hex_dump() to dump buffers ... Browse Code »

    Instead of custom approach let's use recently introduced seq_hex_dump()
    helper.

    In one case it changes the output from
    1111111122222222333333334444444455555555666666667777777788888888
    to
    11111111 22222222 33333333 44444444 55555555 66666666 77777777 88888888

    though it seems it prints same data (by meaning) in both cases. I decide
    to choose to use the space divided one.

    Signed-off-by: Andy Shevchenko
    Acked-by: Helge Deller
    Cc: Alexander Viro
    Cc: Joe Perches
    Cc: Tadeusz Struk
    Cc: Ingo Tuchscherer
    Cc: Catalin Marinas
    Cc: Vladimir Kondratiev
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Andy Shevchenko
     

08 Sep, 2015

1 commit

  • e02a653e1   PCI,parisc: Enable 64-bit bus addresses on PA-RISC ... Browse Code »

    Commit 3a9ad0b ("PCI: Add pci_bus_addr_t") unconditionally introduced usage of
    64-bit PCI bus addresses on all 64-bit platforms which broke PA-RISC.

    It turned out that due to enabling the 64-bit addresses, the PCI logic decided
    to use the GMMIO instead of the LMMIO region. This commit simply disables
    registering the GMMIO and thus we fall back to use the LMMIO region as before.

    Reverts commit 45ea2a5fed6dacb9bb0558d8b21eacc1c45d5bb4
    ("PCI: Don't use 64-bit bus addresses on PA-RISC")

    To: linux-parisc@vger.kernel.org
    Cc: linux-pci@vger.kernel.org
    Cc: Bjorn Helgaas
    Cc: Meelis Roos
    Cc: stable@vger.kernel.org # v3.19+
    Signed-off-by: Helge Deller

    Helge Deller
     

02 Sep, 2015

1 commit

  • 17e6b00ac   Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip ... Browse Code »

    Pull irq updates from Thomas Gleixner:
    "This updated pull request does not contain the last few GIC related
    patches which were reported to cause a regression. There is a fix
    available, but I let it breed for a couple of days first.

    The irq departement provides:

    - new infrastructure to support non PCI based MSI interrupts
    - a couple of new irq chip drivers
    - the usual pile of fixlets and updates to irq chip drivers
    - preparatory changes for removal of the irq argument from interrupt
    flow handlers
    - preparatory changes to remove IRQF_VALID"

    * 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (129 commits)
    irqchip/imx-gpcv2: IMX GPCv2 driver for wakeup sources
    irqchip: Add bcm2836 interrupt controller for Raspberry Pi 2
    irqchip: Add documentation for the bcm2836 interrupt controller
    irqchip/bcm2835: Add support for being used as a second level controller
    irqchip/bcm2835: Refactor handle_IRQ() calls out of MAKE_HWIRQ
    PCI: xilinx: Fix typo in function name
    irqchip/gic: Ensure gic_cpu_if_up/down() programs correct GIC instance
    irqchip/gic: Only allow the primary GIC to set the CPU map
    PCI/MSI: pci-xgene-msi: Consolidate chained IRQ handler install/remove
    unicore32/irq: Prepare puv3_gpio_handler for irq argument removal
    tile/pci_gx: Prepare trio_handle_level_irq for irq argument removal
    m68k/irq: Prepare irq handlers for irq argument removal
    C6X/megamode-pic: Prepare megamod_irq_cascade for irq argument removal
    blackfin: Prepare irq handlers for irq argument removal
    arc/irq: Prepare idu_cascade_isr for irq argument removal
    sparc/irq: Use access helper irq_data_get_affinity_mask()
    sparc/irq: Use helper irq_data_get_irq_handler_data()
    parisc/irq: Use access helper irq_data_get_affinity_mask()
    mn10300/irq: Use access helper irq_data_get_affinity_mask()
    irqchip/i8259: Prepare i8259_irq_dispatch for irq argument removal
    ...

    Linus Torvalds
     

01 Aug, 2015

1 commit

  • d2109a121   parisc/irq: Use access helper irq_data_get_affinity_mask() ... Browse Code »

    Use access helper irq_data_get_affinity_mask() to hide implementation
    details of struct irq_desc.

    Signed-off-by: Jiang Liu
    Cc: Konrad Rzeszutek Wilk
    Cc: Tony Luck
    Cc: Bjorn Helgaas
    Cc: Benjamin Herrenschmidt
    Cc: Randy Dunlap
    Cc: Yinghai Lu
    Cc: Borislav Petkov
    Cc: James E.J. Bottomley
    Cc: Helge Deller
    Link: http://lkml.kernel.org/r/1433145945-789-24-git-send-email-jiang.liu@linux.intel.com
    Signed-off-by: Thomas Gleixner

    Jiang Liu
     

23 Jul, 2015

1 commit

  • dff22d205   PCI: Call pci_read_bridge_bases() from core instead of arch code ... Browse Code »
    20

    When we scan a PCI bus, we read PCI-PCI bridge window registers with
    pci_read_bridge_bases() so we can validate the resource hierarchy. Most
    architectures call pci_read_bridge_bases() from pcibios_fixup_bus(), but
    PCI-PCI bridges are not arch-specific, so this doesn't need to be in
    arch-specific code.

    Call pci_read_bridge_bases() directly from the PCI core instead of from
    arch code.

    For alpha and mips, we now call pci_read_bridge_bases() always; previously
    we only called it if PCI_PROBE_ONLY was set.

    [bhelgaas: changelog]
    Signed-off-by: Lorenzo Pieralisi
    Signed-off-by: Bjorn Helgaas
    CC: Ralf Baechle
    CC: James E.J. Bottomley
    CC: Michael Ellerman
    CC: Bjorn Helgaas
    CC: Richard Henderson
    CC: Benjamin Herrenschmidt
    CC: David Howells
    CC: Russell King
    CC: Tony Luck
    CC: David S. Miller
    CC: Ingo Molnar
    CC: Guenter Roeck
    CC: Michal Simek
    CC: Chris Zankel

    Lorenzo Pieralisi
     

24 Apr, 2015

1 commit

  • a4e4f67f4   parisc: %pf is only for function pointers ... Browse Code »

    Use %ps for actual addresses, otherwise you'll get bad output
    on arches like parisc64 where %pf expects a function descriptor.

    This wasn't normally seen on parisc64 because the code is not built
    unless DEBUG_SUPERIO_INIT is manually defined.

    Patch modified by Helge Deller to utilize KERN_DEBUG.

    Signed-off-by: Scott Wood
    Cc: linux-parisc@vger.kernel.org
    cc: James Bottomley
    Signed-off-by: Helge Deller

    Scott Wood
     

22 Apr, 2015

1 commit

  • 8bf8a1d1c   parisc: Eliminate sg_virt_addr() and private scatterlist.h ... Browse Code »

    The only reason to keep parisc's private asm/scatterlist.h was that it
    had the macro sg_virt_addr(). Convert all callers to use something else
    (sometimes just sg->offset was enough, others should use sg_virt()), and
    we can just use the asm-generic scatterlist.h instead.

    Signed-off-by: Matthew Wilcox
    Signed-off-by: Dave Anglin
    Signed-off-by: Helge Deller

    Matthew Wilcox
     

16 Apr, 2015

1 commit

  • e693d73c2   parisc: remove use of seq_printf return value ... Browse Code »

    The seq_printf return value, because it's frequently misused,
    will eventually be converted to void.

    See: commit 1f33c41c03da ("seq_file: Rename seq_overflow() to
    seq_has_overflowed() and make public")

    Signed-off-by: Joe Perches
    Cc: "James E.J. Bottomley"
    Cc: Helge Deller
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Joe Perches
     

15 Apr, 2015

1 commit

  • d0bbe0dd3   Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial ... Browse Code »

    Pull trivial tree from Jiri Kosina:
    "Usual trivial tree updates. Nothing outstanding -- mostly printk()
    and comment fixes and unused identifier removals"

    * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial:
    goldfish: goldfish_tty_probe() is not using 'i' any more
    powerpc: Fix comment in smu.h
    qla2xxx: Fix printks in ql_log message
    lib: correct link to the original source for div64_u64
    si2168, tda10071, m88ds3103: Fix firmware wording
    usb: storage: Fix printk in isd200_log_config()
    qla2xxx: Fix printk in qla25xx_setup_mode
    init/main: fix reset_device comment
    ipwireless: missing assignment
    goldfish: remove unreachable line of code
    coredump: Fix do_coredump() comment
    stacktrace.h: remove duplicate declaration task_struct
    smpboot.h: Remove unused function prototype
    treewide: Fix typo in printk messages
    treewide: Fix typo in printk messages
    mod_devicetable: fix comment for match_flags

    Linus Torvalds
     

07 Mar, 2015

1 commit

17 Jan, 2015

1 commit

  • 2e5e804a8   parisc/PCI: Clip bridge windows to fit in upstream windows ... Browse Code »

    Every PCI-PCI bridge window should fit inside an upstream bridge window
    because orphaned address space is unreachable from the primary side of the
    upstream bridge. If we inherit invalid bridge windows that overlap an
    upstream window from firmware, clip them to fit and update the bridge
    accordingly.

    [bhelgaas: changelog]
    Link: https://bugzilla.kernel.org/show_bug.cgi?id=85491
    Reported-by: Marek Kordik
    Fixes: 5b28541552ef ("PCI: Restrict 64-bit prefetchable bridge windows to 64-bit resources")
    Signed-off-by: Yinghai Lu
    Signed-off-by: Bjorn Helgaas
    CC: "James E.J. Bottomley"
    CC: Helge Deller
    CC: linux-parisc@vger.kernel.org

    Yinghai Lu
     

13 Oct, 2014

1 commit

  • faafcba3b   Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip ... Browse Code »

    Pull scheduler updates from Ingo Molnar:
    "The main changes in this cycle were:

    - Optimized support for Intel "Cluster-on-Die" (CoD) topologies (Dave
    Hansen)

    - Various sched/idle refinements for better idle handling (Nicolas
    Pitre, Daniel Lezcano, Chuansheng Liu, Vincent Guittot)

    - sched/numa updates and optimizations (Rik van Riel)

    - sysbench speedup (Vincent Guittot)

    - capacity calculation cleanups/refactoring (Vincent Guittot)

    - Various cleanups to thread group iteration (Oleg Nesterov)

    - Double-rq-lock removal optimization and various refactorings
    (Kirill Tkhai)

    - various sched/deadline fixes

    ... and lots of other changes"

    * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (72 commits)
    sched/dl: Use dl_bw_of() under rcu_read_lock_sched()
    sched/fair: Delete resched_cpu() from idle_balance()
    sched, time: Fix build error with 64 bit cputime_t on 32 bit systems
    sched: Improve sysbench performance by fixing spurious active migration
    sched/x86: Fix up typo in topology detection
    x86, sched: Add new topology for multi-NUMA-node CPUs
    sched/rt: Use resched_curr() in task_tick_rt()
    sched: Use rq->rd in sched_setaffinity() under RCU read lock
    sched: cleanup: Rename 'out_unlock' to 'out_free_new_mask'
    sched: Use dl_bw_of() under RCU read lock
    sched/fair: Remove duplicate code from can_migrate_task()
    sched, mips, ia64: Remove __ARCH_WANT_UNLOCKED_CTXSW
    sched: print_rq(): Don't use tasklist_lock
    sched: normalize_rt_tasks(): Don't use _irqsave for tasklist_lock, use task_rq_lock()
    sched: Fix the task-group check in tg_has_rt_tasks()
    sched/fair: Leverage the idle state info when choosing the "idlest" cpu
    sched: Let the scheduler see CPU idle states
    sched/deadline: Fix inter- exclusive cpusets migrations
    sched/deadline: Clear dl_entity params when setscheduling to different class
    sched/numa: Kill the wrong/dead TASK_DEAD check in task_numa_fault()
    ...

    Linus Torvalds
     

02 Oct, 2014

1 commit

22 Sep, 2014

2 commits

19 Sep, 2014

1 commit

  • f139caf2e   sched, cleanup, treewide: Remove set_current_state(TASK_RUNNING) after schedule() ... Browse Code »

    schedule(), io_schedule() and schedule_timeout() always return
    with TASK_RUNNING state set, so one more setting is unnecessary.

    (All places in patch are visible good, only exception is
    kiblnd_scheduler() from:

    drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c

    Its schedule() is one line above standard 3 lines of unified diff)

    No places where set_current_state() is used for mb().

    Signed-off-by: Kirill Tkhai
    Signed-off-by: Peter Zijlstra (Intel)
    Link: http://lkml.kernel.org/r/1410529254.3569.23.camel@tkhai
    Cc: Alasdair Kergon
    Cc: Anil Belur
    Cc: Arnd Bergmann
    Cc: Dave Kleikamp
    Cc: David Airlie
    Cc: David Howells
    Cc: Dmitry Eremin
    Cc: Frank Blaschka
    Cc: Greg Kroah-Hartman
    Cc: Heiko Carstens
    Cc: Helge Deller
    Cc: Isaac Huang
    Cc: James E.J. Bottomley
    Cc: James E.J. Bottomley
    Cc: J. Bruce Fields
    Cc: Jeff Dike
    Cc: Jesper Nilsson
    Cc: Jiri Slaby
    Cc: Laura Abbott
    Cc: Liang Zhen
    Cc: Linus Torvalds
    Cc: Martin Schwidefsky
    Cc: Masaru Nomura
    Cc: Michael Opdenacker
    Cc: Mikael Starvik
    Cc: Mike Snitzer
    Cc: Neil Brown
    Cc: Oleg Drokin
    Cc: Peng Tao
    Cc: Richard Weinberger
    Cc: Robert Love
    Cc: Steven Rostedt
    Cc: Trond Myklebust
    Cc: Ursula Braun
    Cc: Zi Shen Lim
    Cc: devel@driverdev.osuosl.org
    Cc: dm-devel@redhat.com
    Cc: dri-devel@lists.freedesktop.org
    Cc: fcoe-devel@open-fcoe.org
    Cc: jfs-discussion@lists.sourceforge.net
    Cc: linux390@de.ibm.com
    Cc: linux-afs@lists.infradead.org
    Cc: linux-cris-kernel@axis.com
    Cc: linux-kernel@vger.kernel.org
    Cc: linux-nfs@vger.kernel.org
    Cc: linux-parisc@vger.kernel.org
    Cc: linux-raid@vger.kernel.org
    Cc: linux-s390@vger.kernel.org
    Cc: linux-scsi@vger.kernel.org
    Cc: qla2xxx-upstream@qlogic.com
    Cc: user-mode-linux-devel@lists.sourceforge.net
    Cc: user-mode-linux-user@lists.sourceforge.net
    Signed-off-by: Ingo Molnar

    Kirill Tkhai
     

27 Aug, 2014

1 commit

04 Sep, 2013

1 commit

  • a92387419   Merge tag 'pci-v3.12-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci ... Browse Code »

    Pull PCI changes from Bjorn Helgaas:

    PCI device hotplug:
    - Use PCIe native hotplug, not ACPI hotplug, when possible (Neil Horman)
    - Assign resources on per-host bridge basis (Yinghai Lu)

    MPS (Max Payload Size):
    - Allow larger MPS settings below hotplug-capable Root Port (Yijing Wang)
    - Add warnings about unsafe MPS settings (Yijing Wang)
    - Simplify interface and messages (Bjorn Helgaas)

    SR-IOV:
    - Return -ENOSYS on non-SR-IOV devices (Stefan Assmann)
    - Update NumVFs register when disabling SR-IOV (Yijing Wang)

    Virtualization:
    - Add bus and slot reset support (Alex Williamson)
    - Fix ACS (Access Control Services) issues (Alex Williamson)

    Miscellaneous:
    - Simplify PCIe Capability accessors (Bjorn Helgaas)
    - Add pcibios_pm_ops for arch-specific hibernate stuff (Sebastian Ott)
    - Disable decoding during BAR sizing only when necessary (Zoltan Kiss)
    - Delay enabling bridges until they're needed (Yinghai Lu)
    - Split Designware support into Synopsys and Exynos parts (Jingoo Han)
    - Convert class code to use dev_groups (Greg Kroah-Hartman)
    - Cleanup Designware and Exynos I/O access wrappers (Seungwon Jeon)
    - Fix bridge I/O window alignment (Bjorn Helgaas)
    - Add pci_wait_for_pending_transaction() (Casey Leedom)
    - Use devm_ioremap_resource() in Marvell driver (Tushar Behera)

    * tag 'pci-v3.12-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (63 commits)
    PCI/ACPI: Fix _OSC ordering to allow PCIe hotplug use when available
    PCI: exynos: Add I/O access wrappers
    PCI: designware: Drop "addr" arg from dw_pcie_readl_rc()/dw_pcie_writel_rc()
    PCI: Remove pcie_cap_has_devctl()
    PCI: Support PCIe Capability Slot registers only for ports with slots
    PCI: Remove PCIe Capability version checks
    PCI: Allow PCIe Capability link-related register access for switches
    PCI: Add offsets of PCIe capability registers
    PCI: Tidy bitmasks and spacing of PCIe capability definitions
    PCI: Remove obsolete comment reference to pci_pcie_cap2()
    PCI: Clarify PCI_EXP_TYPE_PCI_BRIDGE comment
    PCI: Rename PCIe capability definitions to follow convention
    PCI: Warn if unsafe MPS settings detected
    PCI: Fix MPS peer-to-peer DMA comment syntax
    PCI: Disable decoding for BAR sizing only when it was actually enabled
    PCI: Add comment about needing pci_msi_off() even when CONFIG_PCI_MSI=n
    PCI: Add pcibios_pm_ops for optional arch-specific hibernate functionality
    PCI: Don't restrict MPS for slots below Root Ports
    PCI: Simplify MPS test for Downstream Port
    PCI: Remove unnecessary check for pcie_get_mps() failure
    ...

    Linus Torvalds
     

01 Aug, 2013

1 commit

  • dd5e6d6a3   parisc: Fix interrupt routing for C8000 serial ports ... Browse Code »

    We can't use dev->mod_index for selecting the interrupt routing entry,
    because it's not an index into interrupt routing table. It will be even
    wrong on a machine with 2 CPUs (4 cores). But all needed information is
    contained in the PAT entries for the serial ports. mod[0] contains the
    iosapic address and mod_info has some indications for the interrupt
    input (at least it looks like it). This patch implements the searching
    for the right iosapic and uses this interrupt input information.

    Signed-off-by: Thomas Bogendoerfer
    Cc: # 3.10
    Signed-off-by: Helge Deller

    Thomas Bogendoerfer
     

26 Jul, 2013

1 commit

  • 928bea964   PCI: Delay enabling bridges until they're needed ... Browse Code »

    We currently enable PCI bridges after scanning a bus and assigning
    resources. This is often done in arch code.

    This patch changes this so we don't enable a bridge until necessary, i.e.,
    until we enable a PCI device behind the bridge. We do this in the generic
    pci_enable_device() path, so this also removes the arch-specific code to
    enable bridges.

    [bhelgaas: changelog]
    Signed-off-by: Yinghai Lu
    Signed-off-by: Bjorn Helgaas

    Yinghai Lu
     

10 Jul, 2013

1 commit

04 Jul, 2013

1 commit

  • 790eac564   Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs ... Browse Code »

    Pull second set of VFS changes from Al Viro:
    "Assorted f_pos race fixes, making do_splice_direct() safe to call with
    i_mutex on parent, O_TMPFILE support, Jeff's locks.c series,
    ->d_hash/->d_compare calling conventions changes from Linus, misc
    stuff all over the place."

    * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (63 commits)
    Document ->tmpfile()
    ext4: ->tmpfile() support
    vfs: export lseek_execute() to modules
    lseek_execute() doesn't need an inode passed to it
    block_dev: switch to fixed_size_llseek()
    cpqphp_sysfs: switch to fixed_size_llseek()
    tile-srom: switch to fixed_size_llseek()
    proc_powerpc: switch to fixed_size_llseek()
    ubi/cdev: switch to fixed_size_llseek()
    pci/proc: switch to fixed_size_llseek()
    isapnp: switch to fixed_size_llseek()
    lpfc: switch to fixed_size_llseek()
    locks: give the blocked_hash its own spinlock
    locks: add a new "lm_owner_key" lock operation
    locks: turn the blocked_list into a hashtable
    locks: convert fl_link to a hlist_node
    locks: avoid taking global lock if possible when waking up blocked waiters
    locks: protect most of the file_lock handling with i_lock
    locks: encapsulate the fl_link list handling
    locks: make "added" in __posix_lock_file a bool
    ...

    Linus Torvalds
     

29 Jun, 2013

1 commit

19 Jun, 2013

1 commit

01 Jun, 2013

2 commits

  • b204a4d2d   parisc/PCI: lba: fix: convert to pci_create_root_bus() for correct root bus resources (v2) ... Browse Code »

    commit dc7dce280a
    Author: Bjorn Helgaas
    Date: Fri Oct 28 16:27:27 2011 -0600
    parisc/PCI: lba: convert to pci_create_root_bus() for correct root bus
    resources

    Supply root bus resources to pci_create_root_bus() so they're correct
    immediately. This fixes the problem of "early" and "header" quirks seeing
    incorrect root bus resources.

    added tests for elmmio_space.start while it should use
    elmmio_space.flags. This for example led to incorrect resource
    assignments and a non-working stifb framebuffer on most parisc machines.

    LBA 10:1: PCI host bridge to bus 0000:01
    pci_bus 0000:01: root bus resource [io 0x12000-0x13fff] (bus address [0x2000-0x3fff])
    pci_bus 0000:01: root bus resource [mem 0xfffffffffa000000-0xfffffffffbffffff] (bus address [0xfa000000-0xfbffffff])
    pci_bus 0000:01: root bus resource [mem 0xfffffffff4800000-0xfffffffff4ffffff] (bus address [0xf4800000-0xf4ffffff])
    pci_bus 0000:01: root bus resource [??? 0x00000001 flags 0x0]

    Signed-off-by: Helge Deller
    Acked-by: Bjorn Helgaas

    Helge Deller
     
  • b47d4934e   parisc/PCI: Set type for LBA bus_num resource ... Browse Code »

    The non-PAT resource probing code failed to set the type of the LBA bus_num
    resource (30aa80da43 "parisc/PCI: register busn_res for root buses" did
    the corresponding thing for the PAT case).

    This causes incorrect resource assignments and a non-working stifb
    framebuffer on most parisc machines.

    Signed-off-by: Bjorn Helgaas
    Signed-off-by: Helge Deller

    Bjorn Helgaas
     

25 May, 2013

1 commit

07 May, 2013

1 commit

  • 6a45716ab   parisc: fix partly 16/64k PAGE_SIZE boot ... Browse Code »

    This patch fixes partly PAGE_SIZEs of 16K or 64K by adjusting the
    assembler PTE lookup code and the assembler TEMPALIAS code. Furthermore
    some data alignments for PAGE_SIZE have been limited to 4K (or less) to
    not waste too much memory with greater page sizes. As a side note, the
    palo loader can (currently) only handle up to 10 ELF segments which is
    fixed with tighter aligning as well.

    My testings indicated that the ldci command in the sba iommu coding
    needed adjustment by the PAGE_SHIFT value and that the I/O PDIR Page
    size was only set to 4K for my machine (C3000).

    All this fixes partly the boot, but there are still quite some caching
    problems left. Examples are e.g. the symbios logic driver which is
    failing:

    sym0: rev 0x7 at pci 0000:00:0f.0 irq 69
    sym0: PA-RISC Firmware, ID 7, Fast-40, SE, parity checking
    CACHE TEST FAILED: DMA error (dstat=0x81).sym0: CACHE INCORRECTLY CONFIGURED.

    and the tulip network driver which doesn't seem to work correctly
    either:

    Sending BOOTP requests .net eth0: Setting full-duplex based on MII#1
    link partner capability of 05e1
    ..... timed out!

    Beside those kernel fixes glibc will need fixes too to be able to handle
    >4K page sizes.

    Signed-off-by: Helge Deller

    Helge Deller
     

10 Apr, 2013

1 commit

  • d9dda78ba   procfs: new helper - PDE_DATA(inode) ... Browse Code »

    The only part of proc_dir_entry the code outside of fs/proc
    really cares about is PDE(inode)->data. Provide a helper
    for that; static inline for now, eventually will be moved
    to fs/proc, along with the knowledge of struct proc_dir_entry
    layout.

    Signed-off-by: Al Viro

    Al Viro
     

27 Feb, 2013

1 commit

  • d895cb1af   Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs ... Browse Code »

    Pull vfs pile (part one) from Al Viro:
    "Assorted stuff - cleaning namei.c up a bit, fixing ->d_name/->d_parent
    locking violations, etc.

    The most visible changes here are death of FS_REVAL_DOT (replaced with
    "has ->d_weak_revalidate()") and a new helper getting from struct file
    to inode. Some bits of preparation to xattr method interface changes.

    Misc patches by various people sent this cycle *and* ocfs2 fixes from
    several cycles ago that should've been upstream right then.

    PS: the next vfs pile will be xattr stuff."

    * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (46 commits)
    saner proc_get_inode() calling conventions
    proc: avoid extra pde_put() in proc_fill_super()
    fs: change return values from -EACCES to -EPERM
    fs/exec.c: make bprm_mm_init() static
    ocfs2/dlm: use GFP_ATOMIC inside a spin_lock
    ocfs2: fix possible use-after-free with AIO
    ocfs2: Fix oops in ocfs2_fast_symlink_readpage() code path
    get_empty_filp()/alloc_file() leave both ->f_pos and ->f_version zero
    target: writev() on single-element vector is pointless
    export kernel_write(), convert open-coded instances
    fs: encode_fh: return FILEID_INVALID if invalid fid_type
    kill f_vfsmnt
    vfs: kill FS_REVAL_DOT by adding a d_weak_revalidate dentry op
    nfsd: handle vfs_getattr errors in acl protocol
    switch vfs_getattr() to struct path
    default SET_PERSONALITY() in linux/elf.h
    ceph: prepopulate inodes only when request is aborted
    d_hash_and_lookup(): export, switch open-coded instances
    9p: switch v9fs_set_create_acl() to inode+fid, do it before d_instantiate()
    9p: split dropping the acls from v9fs_set_create_acl()
    ...

    Linus Torvalds
     

23 Feb, 2013

1 commit

21 Feb, 2013

4 commits

04 Jan, 2013

1 commit

  • 0fe763c57   Drivers: misc: remove __dev* attributes. ... Browse Code »

    CONFIG_HOTPLUG is going away as an option. As a result, the __dev*
    markings need to be removed.

    This change removes the use of __devinit, __devexit_p, __devinitdata,
    __devinitconst, and __devexit from these drivers.

    Based on patches originally written by Bill Pemberton, but redone by me
    in order to handle some of the coding style issues better, by hand.

    Cc: Bill Pemberton
    Signed-off-by: Greg Kroah-Hartman

    Greg Kroah-Hartman