Added a sysfs entry to support writing to the offset register on page1.
This register is used to calibrate the chip canceling offset errors in the
current ADC. This means that, over time, reading the IAD register will not
return the correct current measurement, it will have an offset. Writing to
the offset register if the two's complement of the current register while
passing zero current to the load will calibrate the measurements. This
change was tested on real hardware and it was able to calibrate the chip
correctly.

Signed-off-by: Luiz Sampaio <sampaio.ime@gmail.com>

Added a sysfs entry to support reading the page1 registers. This registers
contain Elapsed Time Meter (ETM) data, which shows for how long the chip is
on, as well as an Offset Register data, which can be used to calibrate the
current measurement of the chip.

Signed-off-by: Luiz Sampaio <sampaio.ime@gmail.com>

The purpose of the w1_ds2438_get_page function is to get the register
values at the page passed as the pageno parameter. However, the page0 was
hardcoded, such that the function always returned the page0 contents. Fixed
so that the function can retrieve any page.

Signed-off-by: Luiz Sampaio <sampaio.ime@gmail.com>

The iad sysfs file has permissions for read and write. Changed to the
recommended macro BIN_ATTR_RW.

Signed-off-by: Luiz Sampaio <sampaio.ime@gmail.com>

Since there is only one statement inside the if clause, no brackets are
required.

Signed-off-by: Luiz Sampaio <sampaio.ime@gmail.com>

There is an if statement and, if the function goes into it, it returns. So,
the next else is not required.

Signed-off-by: Luiz Sampaio <sampaio.ime@gmail.com>

…linux/kernel/git/riscv/linux

Pull RISC-V fixes from Palmer Dabbelt:
 "A handful of fixes:

   - a fix to properly select SPARSEMEM_STATIC on rv32

   - a few fixes to kprobes

  I don't generally like sending stuff this late, but these all seem
  pretty safe"

* tag 'riscv-for-linus-5.12-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: keep interrupts disabled for BREAKPOINT exception
  riscv: kprobes/ftrace: Add recursion protection to the ftrace callback
  riscv: add do_page_fault and do_trap_break into the kprobes blacklist
  riscv: Fix spelling mistake "SPARSEMEM" to "SPARSMEM"

…git/arm64/linux

Pull arm64 fix from Catalin Marinas:
 "Fix kernel compilation when using the LLVM integrated assembly.

  A recent commit (2decad9, "arm64: mte: Ensure TIF_MTE_ASYNC_FAULT
  is set atomically") broke the kernel build when using the LLVM
  integrated assembly (only noticeable with clang-12 as MTE is not
  supported by earlier versions and the code in question not compiled).
  The Fixes: tag in the commit refers to the original patch introducing
  subsections for the alternative code sequences"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: alternatives: Move length validation in alternative_{insn, endif}

…/drm

Pull drm fixes from Daniel Vetter:
 "I pinged the usual suspects, only intel fixes pending"

* tag 'drm-fixes-2021-04-16' of git://anongit.freedesktop.org/drm/drm:
  drm/i915/display/vlv_dsi: Do not skip panel_pwr_cycle_delay when disabling the panel
  drm/i915: Don't zero out the Y plane's watermarks
  drm/i915/dpcd_bl: Don't try vesa interface unless specified by VBT

Current riscv's kprobe handlers are run with both preemption and
interrupt enabled, this violates kprobe requirements. Fix this issue
by keeping interrupts disabled for BREAKPOINT exception.

Fixes: c22b0bc ("riscv: Add kprobes supported")
Cc: stable@vger.kernel.org
Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
[Palmer: add a comment]
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

Currently, the riscv's kprobes(powerred by ftrace) handler is
preemptible. Futher check indicates we miss something similar as the
commit c536aa1 ("kprobes/ftrace: Add recursion protection to the
ftrace callback"), so do similar modifications as the commit does.

Fixes: 829adda ("riscv: Add KPROBES_ON_FTRACE supported")
Cc: stable@vger.kernel.org
Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

These two functions are used to implement the kprobes feature so they
can't be kprobed.

Fixes: c22b0bc ("riscv: Add kprobes supported")
Cc: stable@vger.kernel.org
Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

There is a spelling mistake when SPARSEMEM Kconfig copy.

Fixes: a5406a7 ("riscv: Correct SPARSEMEM configuration")
Cc: stable@vger.kernel.org
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

…l/git/rafael/linux-pm

Pull ACPI fix from Rafael Wysocki:
 "Restore the initrd-based ACPI table override functionality broken by
  one of the recent fixes"

* tag 'acpi-5.12-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: x86: Call acpi_boot_table_init() after acpi_table_upgrade()

…linux/kernel/git/brgl/linux

Pull gpio fix from Bartosz Golaszewski:
 "A single fix for an older problem with the sysfs interface: do not
  allow exporting GPIO lines which were marked invalid by the driver"

* tag 'gpio-fixes-for-v5.12-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
  gpio: sysfs: Obey valid_mask

…/git/hid/hid

Pull HID fixes from Jiri Kosina:
 "The changes are all device/driver specific fixes:

   - EV_KEY and EV_ABS regression fix for Wacom from Ping Cheng

   - BIOS-specific quirk to fix some of the AMD_SFH-based systems, from
     Hans de Goede

   - other small error handling fixes and device ID additions"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid:
  HID: wacom: set EV_KEY and EV_ABS only for non-HID_GENERIC type of devices
  AMD_SFH: Add DMI quirk table for BIOS-es which don't set the activestatus bits
  AMD_SFH: Add sensor_mask module parameter
  AMD_SFH: Removed unused activecontrolstatus member from the amd_mp2_dev struct
  HID: wacom: Assign boolean values to a bool variable
  HID cp2112: fix support for multiple gpiochips
  HID: alps: fix error return code in alps_input_configured()
  HID: asus: Add support for 2021 ASUS N-Key keyboard
  HID: google: add don USB id

After commit 2decad9 ("arm64: mte: Ensure TIF_MTE_ASYNC_FAULT is
set atomically"), LLVM's integrated assembler fails to build entry.S:

<instantiation>:5:7: error: expected assembly-time absolute expression
 .org . - (664b-663b) + (662b-661b)
      ^
<instantiation>:6:7: error: expected assembly-time absolute expression
 .org . - (662b-661b) + (664b-663b)
      ^

The root cause is LLVM's assembler has a one-pass design, meaning it
cannot figure out these instruction lengths when the .org directive is
outside of the subsection that they are in, which was changed by the
.arch_extension directive added in the above commit.

Apply the same fix from commit 966a0ac ("arm64/alternatives: move
length validation inside the subsection") to the alternative_endif
macro, shuffling the .org directives so that the length validation
happen will always happen in the same subsections. alternative_insn has
not shown any issue yet but it appears that it could have the same issue
in the future so just preemptively change it.

Fixes: f7b93d4 ("arm64/alternatives: use subsections for replacement sequences")
Cc: <stable@vger.kernel.org> # 5.8.x
Link: ClangBuiltLinux#1347
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Sami Tolvanen <samitolvanen@google.com>
Tested-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Link: https://lore.kernel.org/r/20210414000803.662534-1-nathan@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

…/git/dtor/input

Pull input fixes from Dmitry Torokhov:
 "Just a few driver fixes here"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: elants_i2c - drop zero-checking of ABS_MT_TOUCH_MAJOR resolution
  Input: elants_i2c - fix division by zero if firmware reports zero phys size
  Input: nspire-keypad - enable interrupts only when opened
  Input: i8042 - fix Pegatron C15B ID entry
  Input: n64joy - fix return value check in n64joy_probe()
  Input: s6sy761 - fix coordinate read bit shift

…rg/drm/drm-intel into drm-fixes

Display panel & power related fixes:

- Backlight fix (Lyude)
- Display watermark fix (Ville)
- VLV panel power fix (Hans)

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/YHg4nz/ndzDRmPjd@intel.com

…/kernel/git/device-mapper/linux-dm

Pull device mapper fix from Mike Snitzer:
 "Fix DM verity target FEC support's RS roots IO to always be aligned.

  This fixes a previous stable@ fix that overcorrected for a different
  configuration that also resulted in misaligned roots IO"

* tag 'for-5.12/dm-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm verity fec: fix misaligned RS roots IO

commit df7b59b ("dm verity: fix FEC for RS roots unaligned to
block size") introduced the possibility for misaligned roots IO
relative to the underlying device's logical block size. E.g. Android's
default RS roots=2 results in dm_bufio->block_size=1024, which causes
the following EIO if the logical block size of the device is 4096,
given v->data_dev_block_bits=12:

E sd 0    : 0:0:0: [sda] tag#30 request not aligned to the logical block size
E blk_update_request: I/O error, dev sda, sector 10368424 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
E device-mapper: verity-fec: 254:8: FEC 9244672: parity read failed (block 18056): -5

Fix this by onlu using f->roots for dm_bufio blocksize IFF it is
aligned to v->data_dev_block_bits.

Fixes: df7b59b ("dm verity: fix FEC for RS roots unaligned to block size")
Cc: stable@vger.kernel.org
Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

…git/s390/linux

Pull s390 fixes from Heiko Carstens:

 - setup stack backchain properly in external and i/o interrupt handler
   to fix stack unwinding. This broke when converting to generic entry

  - save caller address of psw_idle to get a sane stacktrace

* tag 's390-5.12-7' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/entry: save the caller of psw_idle
  s390/entry: avoid setting up backchain in ext|io handlers

…git/arm64/linux

Pull arm64 fixes from Will Deacon:

 - Fix incorrect asm constraint for load_unaligned_zeropad() fixup

 - Fix thread flag update when setting TIF_MTE_ASYNC_FAULT

 - Fix restored irq state when handling fault on kprobe

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: kprobes: Restore local irqflag if kprobes is cancelled
  arm64: mte: Ensure TIF_MTE_ASYNC_FAULT is set atomically
  arm64: fix inline asm in load_unaligned_zeropad()

…kernel/git/vkoul/dmaengine

Pull dmaengine fixes from Vinod Koul:
 "A couple of dmaengine driver fixes for:

   - race and descriptor issue for xilinx driver

   - fix interrupt handling, wq state & cleanup, field sizes for
     completion, msix permissions for idxd driver

   - runtime pm fix for tegra driver

   - double free fix in dma_async_device_register"

* tag 'dmaengine-fix-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine:
  dmaengine: idxd: fix wq cleanup of WQCFG registers
  dmaengine: idxd: clear MSIX permission entry on shutdown
  dmaengine: plx_dma: add a missing put_device() on error path
  dmaengine: tegra20: Fix runtime PM imbalance on error
  dmaengine: Fix a double free in dma_async_device_register
  dmaengine: dw: Make it dependent to HAS_IOMEM
  dmaengine: idxd: fix wq size store permission state
  dmaengine: idxd: fix opcap sysfs attribute output
  dmaengine: idxd: fix delta_rec and crc size field for completion record
  dmaengine: idxd: Fix clobbering of SWERR overflow bit on writeback
  dmaengine: xilinx: dpdma: Fix race condition in done IRQ
  dmaengine: xilinx: dpdma: Fix descriptor issuing on video group

Pull VFIO fix from Alex Williamson:
 "Verify mmap region within range (Christian A. Ehrhardt)"

* tag 'vfio-v5.12-rc8' of git://github.com/awilliam/linux-vfio:
  vfio/pci: Add missing range check in vfio_pci_mmap

Pull kvm fix from Paolo Bonzini:
 "Fix for a possible out-of-bounds access"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: VMX: Don't use vcpu->run->internal.ndata as an array index

…nel/git/rostedt/linux-trace

Pull tracing fix from Steven Rostedt:
 "Fix a memory link in dyn_event_release().

  An error path exited the function before freeing the allocated 'argv'
  variable"

* tag 'trace-v5.12-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing/dynevent: Fix a memory leak in an error handling path

__vmx_handle_exit() uses vcpu->run->internal.ndata as an index for
an array access.  Since vcpu->run is (can be) mapped to a user address
space with a writer permission, the 'ndata' could be updated by the
user process at anytime (the user process can set it to outside the
bounds of the array).
So, it is not safe that __vmx_handle_exit() uses the 'ndata' that way.

Fixes: 1aa561b ("kvm: x86: Add "last CPU" to some KVM_EXIT information")
Signed-off-by: Reiji Watanabe <reijiw@google.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Message-Id: <20210413154739.490299-1-reijiw@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

…kernel/git/mtd/linux

Pull MTD fix from Richard Weinberger:
 "Fix WAITRDY break condition and timeout in mtk nand driver"

* tag 'fixes-for-5.12-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux:
  mtd: rawnand: mtk: Fix WAITRDY break condition and timeout

We must free 'argv' before returning, as already done in all the other
paths of this function.

Link: https://lkml.kernel.org/r/21e3594ccd7fc88c5c162c98450409190f304327.1618136448.git.christophe.jaillet@wanadoo.fr

Fixes: d262271 ("tracing/dynevent: Delegate parsing to create function")
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

When mmaping an extra device region verify that the region index
derived from the mmap offset is valid.

Fixes: a15b188 ("vfio_pci: Allow mapping extra regions")
Cc: stable@vger.kernel.org
Signed-off-by: Christian A. Ehrhardt <lk@c--e.de>
Message-Id: <20210412214124.GA241759@lisa.in-ulm.de>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

Commit 1a1c130 ("ACPI: tables: x86: Reserve memory occupied by
ACPI tables") attempted to address an issue with reserving the memory
occupied by ACPI tables, but it broke the initrd-based table override
mechanism relied on by multiple users.

To restore the initrd-based ACPI table override functionality, move
the acpi_boot_table_init() invocation in setup_arch() on x86 after
the acpi_table_upgrade() one.

Fixes: 1a1c130 ("ACPI: tables: x86: Reserve memory occupied by ACPI tables")
Reported-by: Hans de Goede <hdegoede@redhat.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

If instruction being single stepped caused a page fault, the kprobes
is cancelled to let the page fault handler continue as a normal page
fault. But the local irqflags are disabled so cpu will restore pstate
with DAIF masked. After pagefault is serviced, the kprobes is
triggerred again, we overwrite the saved_irqflag by calling
kprobes_save_local_irqflag(). NOTE, DAIF is masked in this new saved
irqflag. After kprobes is serviced, the cpu pstate is retored with
DAIF masked.

This patch is inspired by one patch for riscv from Liao Chang.

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Link: https://lore.kernel.org/r/20210412174101.6bfb0594@xhacker.debian
Signed-off-by: Will Deacon <will@kernel.org>

A pre-release silicon erratum workaround where wq reset does not clear
WQCFG registers was leaked into upstream code. Use wq reset command
instead of blasting the MMIO region. This also address an issue where
we clobber registers in future devices.

Fixes: da32b28 ("dmaengine: idxd: cleanup workqueue config after disabling")
Reported-by: Shreenivaas Devarajan <shreenivaas.devarajan@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161824330020.881560.16375921906426627033.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Add disabling/clearing of MSIX permission entries on device shutdown to
mirror the enabling of the MSIX entries on probe. Current code left the
MSIX enabled and the pasid entries still programmed at device shutdown.

Fixes: 8e50d39 ("dmaengine: idxd: Add shared workqueue support")
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161824457969.882533.6020239898682672311.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>