Originally libfc would just be initializing the refcount to '1', and
using the disc_mutex to synchronize if and when the final put should be
happening.  This has a race condition as the mutex might be delayed,
causing other threads to access an invalid structure.  This patch
updates the rport reference counting to increase the reference every
time 'rport_lookup' is called, and decreases the reference
correspondingly.  This removes the need to hold 'disc_mutex' when
removing the structure, and avoids the above race condition.
Signed-off-by: NHannes Reinecke <hare@suse.com>
Acked-by: NVasu Dev <vasu.dev@intel.com>
Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Fix build when CONFIG_ISA_DMA_API is not enabled. Fixes these build
errors (on x86_64):

../drivers/scsi/ultrastor.c: In function 'ultrastor_14f_detect':
../drivers/scsi/ultrastor.c:519:5: error: implicit declaration of function 'request_dma' [-Werror=implicit-function-declaration]
     if (config.dma_channel && request_dma(config.dma_channel,"Ultrastor")) {
     ^
../drivers/scsi/ultrastor.c: In function 'ultrastor_release':
../drivers/scsi/ultrastor.c:658:3: error: implicit declaration of function 'free_dma' [-Werror=implicit-function-declaration]
   free_dma(shost->dma_channel);
   ^
Signed-off-by: NRandy Dunlap <rdunlap@infradead.org>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Trivial fix to spelling mistake in printk message.
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Reviewed-by: NLaurence Oberman <loberman@redhat.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Signed-off-by: NJohn Garry <john.garry@huawei.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

It is not necessary to surround call to
notify_port_event(, PORTE_BROADCAST_RCVD) by spin_lock_irqsave(),
so remove.
This was causing a warn, as below:

    =================================
    [ INFO: inconsistent lock state ]
    4.4.8+ #12 Not tainted
    ---------------------------------
    inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage.
    kworker/u64:1/168 [HC0[0]:SC0[0]:HE1:SE1] takes:
     (&(&hisi_hba->lock)->rlock){?.....}, at: [<ffffffc00052c708>] alloc_dev_quirk_v2_hw+0x48/0xec
    {IN-HARDIRQ-W} state was registered at:
      [<ffffffc0000fc764>] mark_lock+0x19c/0x6a0
      [<ffffffc0000fdc14>] __lock_acquire+0xa2c/0x1d00
      [<ffffffc0000ff654>] lock_acquire+0x58/0x7c
      [<ffffffc0008b609c>] _raw_spin_lock_irqsave+0x54/0x6c
      [<ffffffc00052d3c0>] int_chnl_int_v2_hw+0x1c4/0x248
      [<ffffffc0001098e8>] handle_irq_event_percpu+0x9c/0x144
      [<ffffffc0001099d4>] handle_irq_event+0x44/0x74
      [<ffffffc00010cd68>] handle_fasteoi_irq+0xb4/0x188
      [<ffffffc000108ea8>] generic_handle_irq+0x24/0x38
      [<ffffffc0001091fc>] __handle_domain_irq+0x60/0xac
      [<ffffffc00008261c>] gic_handle_irq+0xcc/0x168
      [<ffffffc0000855ac>] el1_irq+0x6c/0xe0
      [<ffffffc0000f7414>] default_idle_call+0x1c/0x34
      [<ffffffc0000f7654>] cpu_startup_entry+0x1d4/0x228
      [<ffffffc0008aecd8>] rest_init+0x150/0x160
      [<ffffffc000c4b95c>] start_kernel+0x3a4/0x3b8
      [<00000000008bb000>] 0x8bb000
    irq event stamp: 32661
    hardirqs last  enabled at (32661): [<ffffffc0008b41a8>] __mutex_unlock_slowpath+0x108/0x18c
    hardirqs last disabled at (32660): [<ffffffc0008b40e4>] __mutex_unlock_slowpath+0x44/0x18c
    softirqs last  enabled at (25114): [<ffffffc0000bde68>] __do_softirq+0x210/0x27c
    softirqs last disabled at (25095): [<ffffffc0000be224>] irq_exit+0x9c/0xe8

    other info that might help us debug this:
     Possible unsafe locking scenario:

           CPU0
           ----
      lock(&(&hisi_hba->lock)->rlock);
      <Interrupt>
        lock(&(&hisi_hba->lock)->rlock);

     *** DEADLOCK ***

    2 locks held by kworker/u64:1/168:
     #0:  ("%s"shost->work_q_name){++++.+}, at: [<ffffffc0000d2980>] process_one_work+0x134/0x3cc
     #1:  ((&sw->work)#2){+.+.+.}, at: [<ffffffc0000d2980>] process_one_work+0x134/0x3cc

    stack backtrace:
    CPU: 4 PID: 168 Comm: kworker/u64:1 Not tainted 4.4.8+ #12
    Hardware name: Huawei Technologies Co., Ltd. D03/D03, BIOS 1.12 01/01/1900
    Workqueue: scsi_wq_1 sas_discover_domain
    Call trace:
    [<ffffffc000089988>] dump_backtrace+0x0/0x114
    [<ffffffc000089ab0>] show_stack+0x14/0x1c
    [<ffffffc00035ac50>] dump_stack+0xb4/0xf0
    [<ffffffc0000fc524>] print_usage_bug+0x210/0x2b4
    [<ffffffc0000fcbc4>] mark_lock+0x5fc/0x6a0
    [<ffffffc0000fd9e8>] __lock_acquire+0x800/0x1d00
    [<ffffffc0000ff654>] lock_acquire+0x58/0x7c
    [<ffffffc0008b5edc>] _raw_spin_lock+0x44/0x58
    [<ffffffc00052c708>] alloc_dev_quirk_v2_hw+0x48/0xec
    [<ffffffc000528214>] hisi_sas_dev_found+0x48/0x1b8
    [<ffffffc00051a9b8>] sas_notify_lldd_dev_found+0x34/0xe0
    [<ffffffc00051e5e8>] sas_discover_root_expander+0x58/0x128
    [<ffffffc00051b38c>] sas_discover_domain+0x4bc/0x564
    [<ffffffc0000d29ec>] process_one_work+0x1a0/0x3cc
    [<ffffffc0000d2d50>] worker_thread+0x138/0x438
    [<ffffffc0000d9494>] kthread+0xdc/0xf0
    [<ffffffc000085c50>] ret_from_fork+0x10/0x40
Signed-off-by: NWei Xu <xuwei5@hisilicon.com>
Signed-off-by: NJohn Garry <john.garry@huawei.com>
Reviewed-by: NZhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Add support in v2 hw driver for ACPI.

A check on whether an ACPI handle is available for the device is used to
decide on whether to use ACPI reset handler or syscon for hw reset.
Signed-off-by: NJohn Garry <john.garry@huawei.com>
Signed-off-by: NWei Xu <xuwei5@hisilicon.com>
Reviewed-by: NZhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

When a virtual scsi DVD device is present with no image file
attached the storvsc driver logs all resulting unnecessary sense errors
whenever IO is issued to the device.

[storvsc] Sense Key : Not Ready [current]
[storvsc] Add. Sense: Medium not present - tray closed

[mkp: Fixed whitespace]
Signed-off-by: NCathy Avery <cavery@redhat.com>
Reviewed-by: NK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

The "fcp_rsp_code = %d" message isn't an error, it's meant to be
informative only.  This patch prevents a flood of such messages in some
situations.
Signed-off-by: NMaurizio Lombardi <mlombard@redhat.com>
Tested-by: NLaurence Oberman <loberman@redhat.com>
Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de>
Acked-by: NChad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

If _scsih_sas_host_add's call to mpt3sas_config_get_sas_iounit_pg0
fails, ioc->sas_hba.parent_dev may be left uninitialized.  A later
device probe could invoke mpt3sas_transport_port_add which will call
sas_port_alloc_num [scsi_transport_sas] with a NULL parent_dev pointer.
Signed-off-by: NJoe Lawrence <joe.lawrence@stratus.com>
Acked-by: NSreekanth Reddy <sreekanth.reddy@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

In _scsih_sas_host_add, the number of HBA phys are determined and then
later used to allocate an array of struct _sas_phy's.  If the routine
sets ioc->sas_hba.num_phys, but then fails to allocate the
ioc->sas_hba.phy array (by kcalloc error or other intermediate
error/exit path), ioc->sas_hba is left in a dangerous state: all readers
of ioc->sas_hba.phy[] do so by indexing it from 0..ioc->sas_hba.num_phys
without checking that the space was ever allocated.

Modify _scsih_sas_host_add to set ioc->sas_hba.num_phys only after
successfully allocating ioc->sas_hba.phy[].
Signed-off-by: NJoe Lawrence <joe.lawrence@stratus.com>
Acked-by: NSreekanth Reddy <sreekanth.reddy@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

This patch adds license info to the tc-dwc-g210 and ufshcd-dwc files in
order for them to have access to some ufshcd symbols when all are built
as modules.
Signed-off-by: NJoao Pinto <jpinto@synopsys.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Submitters of device tree binding documentation may forget to CC the
subsystem maintainer if this is missing.
Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Cc: James E.J. Bottomley <jejb@linux.vnet.ibm.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: linux-scsi@vger.kernel.org
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Use kmemdup when some other buffer is immediately copied into allocated
region. It replaces call to allocation followed by memcpy, by a single
call to kmemdup.
Signed-off-by: NMuhammad Falak R Wani <falakreyaz@gmail.com>
Reviewed-by: NRaghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

firmare -> firmware
Signed-off-by: NJulia Lawall <Julia.Lawall@lip6.fr>
Acked-by: NJack Wang <jinpu.wang@profitbricks.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

firmare -> firmware
Signed-off-by: NJulia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

This patch adds a glue pci driver for the Synopsys G210 Test Chip.

[mkp: Fixed Kconfig depends and module name]
Signed-off-by: NJoao Pinto <jpinto@synopsys.com>
Reviewed-by: NHannes Reinicke <hare@suse.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

This patch adds a glue platform driver for the Synopsys G210 Test Chip.
Signed-off-by: NJoao Pinto <jpinto@synopsys.com>
Reviewed-by: NHannes Reinicke <hare@suse.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

This patch adds support for Synopsys G210 Test Chip.
Signed-off-by: NJoao Pinto <jpinto@synopsys.com>
Reviewed-by: NHannes Reinicke <hare@suse.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

This patch has the goal to add support for DesignWare UFS Controller
specific operations.
Signed-off-by: NJoao Pinto <jpinto@synopsys.com>
Reviewed-by: NHannes Reinicke <hare@suse.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Add link status to ufshci.
Signed-off-by: NJoao Pinto <jpinto@synopsys.com>
Acked-by: NTomas Winkler <tomas.winkler@intel.com>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Add unipro attributes.
Signed-off-by: NJoao Pinto <jpinto@synopsys.com>
Acked-by: NTomas Winkler <tomas.winkler@intel.com>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Add UFS 2.0 support to the UFS core driver.
Signed-off-by: NJoao Pinto <jpinto@synopsys.com>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NTomas Winkler <tomas.winkler@intel.com>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Add UFS 2.0 to the ufshcd-pltfrm devicetree binding.
Signed-off-by: NJoao Pinto <jpinto@synopsys.com>
Acked-by: NRob Herring <robh@kernel.org>
Acked-by: NTomas Winkler <tomas.winkler@intel.com>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Fixed typo in ufshcd-pltfrm.
Signed-off-by: NJoao Pinto <jpinto@synopsys.com>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NTomas Winkler <tomas.winkler@intel.com>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Merge tag 'qcom-smd-list-voltage' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator

Pull regulator fix from Mark Brown:
 "Fix qcom-smd list voltage issues for msm8974

  This commit looks like a cleanup but in fact by causing the core to go
  down some simplified code paths for noop regulators it avoids a boot
  time crash for msm8974 platforms which was introduced in v4.7.  It has
  been in -next for a while, the issues in mainline for these platforms
  weren't flagged up to me until yesterday (I think it took some time to
  figure out what was going wrong)"

* tag 'qcom-smd-list-voltage' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: qcom_smd: Remove list_voltage callback for rpm_smps_ldo_ops_fixed

Pull vfs fixes from Al Viro.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  posix_acl: de-union a_refcount and a_rcu
  nfs_atomic_open(): prevent parallel nfs_lookup() on a negative hashed
  Use the right predicate in ->atomic_open() instances

Currently the two are unioned together, but I don't think that's safe.

It looks like get_cached_acl could race with the last put in
posix_acl_release. get_cached_acl calls atomic_inc_not_zero on
a_refcount, but that field could have already been clobbered by
call_rcu, and may no longer be zero. Fix this by de-unioning the two
fields.

Fixes: b8a7a3a6 (posix_acl: Inode acl caching fixes)
Signed-off-by: NJeff Layton <jlayton@redhat.com>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

The well-spotted fallocate undo fix is good in most cases, but not when
fallocate failed on the very first page.  index 0 then passes lend -1
to shmem_undo_range(), and that has two bad effects: (a) that it will
undo every fallocation throughout the file, unrestricted by the current
range; but more importantly (b) it can cause the undo to hang, because
lend -1 is treated as truncation, which makes it keep on retrying until
every page has gone, but those already fully instantiated will never go
away.  Big thank you to xfstests generic/269 which demonstrates this.

Fixes: b9b4bb26 ("tmpfs: don't undo fallocate past its last page")
Cc: stable@vger.kernel.org
Signed-off-by: NHugh Dickins <hughd@google.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Pull MIPS fix from Ralf Baechle:
 "Another week with just a single 4.7 fix.

  This fixes a possible 'loss' of the huge page bit from pmd on
  permission change"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  MIPS: Fix page table corruption on THP permission changes.

Pull SCSI fixes from James Bottomley:
 "Three fixes.  One is the qla24xx MSI regression, one is a theoretical
  problem over blacklist matching, which would bite USB badly if it ever
  triggered and one is a system hang with a particular type of IPR
  device"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  qla2xxx: Fix NULL pointer deref in QLA interrupt
  SCSI: fix new bug in scsi_dev_info_list string matching
  ipr: Clear interrupt on croc/crocodile when running with LSI

Merge tag 'ecryptfs-4.7-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks/ecryptfs

Pull eCryptfs fixes from Tyler Hicks:
 "Provide a more concise fix for CVE-2016-1583:
   - Additionally fixes linux-stable regressions caused by the
     cherry-picking of the original fix

  Some very minor changes that have queued up:
   - Fix typos in code comments
   - Remove unnecessary check for NULL before destroying kmem_cache"

* tag 'ecryptfs-4.7-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks/ecryptfs:
  ecryptfs: don't allow mmap when the lower fs doesn't support it
  Revert "ecryptfs: forbid opening files without mmap handler"
  ecryptfs: fix spelling mistakes
  eCryptfs: fix typos in comment
  ecryptfs: drop null test before destroy functions

Pull IOMMU fixes from Joerg Roedel:
 "Two Fixes:

   - Intel VT-d fix for a suspend/resume issue, introduced with the
     scalability improvements in this cycle.

   - AMD IOMMU fix for systems that have unity mappings defined.  There
     was a race where translation got enabled before the unity mappings
     were in place.  This issue was seen on some HP servers"

* tag 'iommu-fixes-v4.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/amd: Fix unity mapping initialization race
  iommu/vt-d: Fix infinite loop in free_all_cpu_cached_iovas

Pull xen bug fixes from David Vrabel:

 - Fix two bugs in the handling of xenbus transactions.

 - Make the xen acpi driver compatible with Xen 4.7.

* tag 'for-linus-4.7b-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/acpi: allow xen-acpi-processor driver to load on Xen 4.7
  xenbus: simplify xenbus_dev_request_and_reply()
  xenbus: don't bail early from xenbus_dev_request_and_reply()
  xenbus: don't BUG() on user mode induced condition

Pull arm64 fixes from Will Deacon:
 "A couple of late fixes here, but one that we've been sitting on for a
  few weeks while the details were worked out.  Specifically, we now
  enforce USER_DS on taking exceptions whilst in the kernel, which
  avoids leaking kernel data to userspace through things like perf.  The
  other patch is an update to a workaround for a hardware erratum on
  some Cavium SoCs.

  Summary:

   - Enforce USER_DS on exception entry from EL1

   - Apply workaround for Cavium errata #27456 on Thunderx-81xx parts"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: Enable workaround for Cavium erratum 27456 on thunderx-81xx
  arm64: kernel: Save and restore UAO and addr_limit on exception entry

Pull x86 fixes from Ingo Molnar:
 "Three fixes:

   - A boot crash fix with certain configs
   - a MAINTAINERS entry update
   - Documentation typo fixes"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/Documentation: Fix various typos in Documentation/x86/ files
  x86/amd_nb: Fix boot crash on non-AMD systems
  MAINTAINERS: Update the Calgary IOMMU entry

Pull scheduler fixes from Ingo Molnar:
 "Two load-balancing fixes for cgroups-intense workloads"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/fair: Fix calc_cfs_shares() fixed point arithmetics width confusion
  sched/fair: Fix effective_load() to consistently use smoothed load

Pull perf fixes from Ingo Molnar:
 "Various fixes:

   - 32-bit callgraph bug fix
   - suboptimal event group scheduling bug fix
   - event constraint fixes for Broadwell/Skylake
   - RAPL module name collision fix"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/core: Fix pmu::filter_match for SW-led groups
  x86/perf/intel/rapl: Fix module name collision with powercap intel-rapl
  perf/x86: Fix 32-bit perf user callgraph collection
  perf/x86/intel: Update event constraints when HT is off

Pull irq fixes from Ingo Molnar:
 "Two MIPS-GIC irqchip driver fixes to unbreak certain MIPS boards"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/mips-gic: Match IPI IRQ domain by bus token only
  irqchip/mips-gic: Map to VPs using HW VPNum

Pull GPIO fixes from Linus Walleij:
 "I don't like to toss in last minute patches, but these are all for
  things that are broken, and have bitten people for real.  Two of them
  go into stable.  Maybe all of them if the compile test problem is a
  pain in the ass also for stable folks.

  Final (hopefully) GPIO fixes for v4.7:

   - Fix an oops on the Asus Eee PC 1201

   - Revert a patch trying to split GPIO parsing and GPIO configuration

   - Revert a too liberal compile testing thing"

* tag 'gpio-v4.7-5' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  Revert "gpio: gpiolib-of: Allow compile testing"
  Revert "gpiolib: Split GPIO flags parsing and GPIO configuration"
  gpio: sch: Fix Oops on module load on Asus Eee PC 1201