Execution of break instruction, trap instructions, emulation of unaligned
loads or floating point instructions - anything that tries to read the
instruction's opcode from userspace - needs read access to a page.
RIXI (Read Inhibit / Execute Inhibit) support however allows the creation of
pags that are executable but not readable. On such a mapping the attempted
load of the opcode by the kernel is going to cause an endless loop of
page faults.
The quick workaround for this is to disable the combinations that the kernel
currently isn't able to handle which are executable mappings.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
On Malta, since commit a87ea88d8f ("MIPS: Malta: initialise the RTC at
boot"), the RTC is reinitialised and forced into binary coded decimal
(BCD) mode during init, even if the bootloader has already initialised
it, and may even have already put it into binary mode (as YAMON does).
This corrupts the current time, can result in the RTC seconds being an
invalid BCD (e.g. 0x1a..0x1f) for up to 6 seconds, as well as confusing
YAMON for a while after reset, enough for it to report timeouts when
attempting to load from TFTP (it actually uses the RTC in that code).
Therefore only initialise the RTC to the extent that is necessary so
that Linux avoids interfering with the bootloader setup, while also
allowing it to estimate the CPU frequency without hanging, without a
bootloader necessarily having done anything with the RTC (for example
when the kernel is loaded via EJTAG).
The divider control is configured for a 32KHZ reference clock if
necessary, and the SET bit of the RTC_CONTROL register is cleared if
necessary without changing any other bits (this bit will be set when
coming out of reset if the battery has been disconnected).
Fixes: a87ea88d8f ("MIPS: Malta: initialise the RTC at boot")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Reviewed-by: Paul Burton <paul.burton@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Maciej W. Rozycki <macro@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # 3.14+
Patchwork: https://patchwork.linux-mips.org/patch/10739/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Commit eeb5389503 ("MIPS: unaligned: Prevent EVA instructions on kernel
unaligned accesses") renamed the Load* and Store* defines in unaligned.c
to _Load* and _Store* as part of its fix. One define was missed out which
causes big endian R6 kernels to fail to build.
arch/mips/kernel/unaligned.c:880:35:
error: implicit declaration of function '_StoreDW'
#define StoreDW(addr, value, res) _StoreDW(addr, value, res)
^
Signed-off-by: James Cowgill <James.Cowgill@imgtec.com>
Fixes: eeb5389503 ("MIPS: unaligned: Prevent EVA instructions on kernel unaligned accesses")
Cc: Markos Chandras <markos.chandras@imgtec.com>
Cc: <stable@vger.kernel.org> # 4.0+
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/10575/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
p->thread.user_cpus_allowed is zero-initialized and is only filled on
the first sched_setaffinity call.
To avoid adding overhead in the task initialization codepath, simply OR
the returned mask in sched_getaffinity with p->cpus_allowed.
Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/10740/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Commit 01306aeadd ("MIPS: prepare for user enabling of CONFIG_OF")
changed the guards in asm/prom.h from CONFIG_OF to CONFIG_USE_OF, but
missed the actual function declarations in kernel/prom.c, which have
additional dependencies.
Fixes the following build error:
CC arch/mips/kernel/prom.o
arch/mips/kernel/prom.c: In function '__dt_setup_arch':
arch/mips/kernel/prom.c:54:2: error: implicit declaration of function 'early_init_dt_scan' [-Werror=implicit-function-declaration]
if (!early_init_dt_scan(bph))
^
Fixes: 01306aeadd ("MIPS: prepare for user enabling of CONFIG_OF")
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Acked-by: Rob Herring <robh@kernel.org>
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Cc: Grant Likely <grant.likely@linaro.org>
Patchwork: https://patchwork.linux-mips.org/patch/10741/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
71eeedcf51 (MIPS: Lemote 2F: Fix build caused
by recent mass rename.) only fixed one instance of this issue in arch/mips
but missed a 2nd one in drivers/cpufreq/loongson2_cpufreq.c.
[ralf@linux-mips.org: dropped the one segment for the already fixed
instance and changed the other avoiding an include <path.h> without a /
because that's generally is a bad idea.]
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Patchwork: https://patchwork.linux-mips.org/patch/10659/
I have a report of drop_one_stripe() called from
raid5_cache_scan() apparently finding ->max_nr_stripes == 0.
This should not be allowed.
So add a test to keep max_nr_stripes above min_nr_stripes.
Also use a 'mask' rather than a 'mod' in drop_one_stripe
to ensure 'hash' is valid even if max_nr_stripes does reach zero.
Fixes: edbe83ab4c ("md/raid5: allow the stripe_cache to grow and shrink.")
Cc: stable@vger.kernel.org (4.1 - please release with 2d5b569b66)
Reported-by: Tomas Papan <tomas.papan@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.com>
In drivers/md/md.c get_bitmap_file() uses kmalloc() for creating a
mdu_bitmap_file_t called "file".
5769 file = kmalloc(sizeof(*file), GFP_NOIO);
5770 if (!file)
5771 return -ENOMEM;
This structure is copied to user space at the end of the function.
5786 if (err == 0 &&
5787 copy_to_user(arg, file, sizeof(*file)))
5788 err = -EFAULT
But if bitmap is disabled only the first byte of "file" is initialized
with zero, so it's possible to read some bytes (up to 4095) of kernel
space memory from user space. This is an information leak.
5775 /* bitmap disabled, zero the first byte and copy out */
5776 if (!mddev->bitmap_info.file)
5777 file->pathname[0] = '\0';
Signed-off-by: Benjamin Randazzo <benjamin@randazzo.fr>
Signed-off-by: NeilBrown <neilb@suse.com>
The exynos thermal driver use the of_thermal_*() API to parse the basic data
for thermal management from devicetree file. So, if CONFIG_EXYNOS_THERMAL is
selected without CONFIG_THERMAL_OF, kernel can build it without any problem.
But, exynos thermal driver is not working with following error log. This patch
add the dependency of CONFIG_THERMAL_OF instead of CONFIG_OF.
[ 1.458644] get_th_reg: Cannot get trip points from of-thermal.c!
[ 1.459096] get_th_reg: Cannot get trip points from of-thermal.c!
[ 1.465211] exynos4412_tmu_initialize: No CRITICAL trip point defined at of-thermal.c!
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
During probe the regulator (if present) was enabled but not disabled in
case of failure. So an unsuccessful probe lead to enabling the
regulator which was actually not needed because the device was not
enabled.
Additionally each deferred probe lead to increase of regulator enable
count so it would not be effectively disabled during removal of the
device.
Test HW: Exynos4412 - Trats2 board
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Fixes: 498d22f616 ("thermal: exynos: Support for TMU regulator defined at device tree")
Cc: <stable@vger.kernel.org>
Reviewed-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Tested-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
The power allocator governor uses ftrace to output a bunch of internal
data for debugging and tuning. Currently, the requested power it
outputs is the "weighted" requested power, that is, what each cooling
device has requested multiplied by the cooling device weight. It is
more useful to trace the real request, without any weight being
applied.
This commit only affects the data traced, there is no functional change.
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
raid1_end_read_request() assumes that the In_sync bits are consistent
with the ->degaded count.
raid1_spare_active updates the In_sync bit before the ->degraded count
and so exposes an inconsistency, as does error()
So extend the spinlock in raid1_spare_active() and error() to hide those
inconsistencies.
This should probably be part of
Commit: 34cab6f420 ("md/raid1: fix test for 'was read error from
last working device'.")
as it addresses the same issue. It fixes the same bug and should go
to -stable for same reasons.
Fixes: 76073054c9 ("md/raid1: clean up read_balance.")
Cc: stable@vger.kernel.org (v3.0+)
Signed-off-by: NeilBrown <neilb@suse.com>
Revision 1.2 of the datasheet recommends on page 22 to only write non-zero
values read from OTP register 0x70 into AFECTRL register.
Signed-off-by: Hartmut Knaack <knaack.h@gmx.de>
Reviewed-by: Tiberiu Breana <tiberiu.a.breana@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Drop the otherwise unused definition of the channel-array size and use it
directly in _probe - makes it a bit more obvious.
Signed-off-by: Hartmut Knaack <knaack.h@gmx.de>
Acked-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Use augmented assignment to subtract the offset for negative temperature
values.
Specify the amount of private data to be allocated through
devm_iio_device_alloc() with sizeof(*priv), as it is shorter and common
practice in IIO.
Signed-off-by: Hartmut Knaack <knaack.h@gmx.de>
Acked-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Mark berlin2_adc_channels array as constant.
Signed-off-by: Hartmut Knaack <knaack.h@gmx.de>
Acked-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Pass up the real error code returned by platform_get_irq_byname().
Signed-off-by: Hartmut Knaack <knaack.h@gmx.de>
Acked-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Ted Ts'o reports that his Lenovo T540p ThinkPad crashes at boot if
attached to the docking station. This is a regression that he was able
to bisect to commit 8c7b5ccb72: "drm/i915: Use atomic helpers for
computing changed flags:"
The reason seems to be the new call to drm_atomic_helper_check_modeset()
added to intel_modeset_compute_config(), which in turn calls
update_connector_routing(), and somehow ends up picking a NULL crtc for
the connector state, causing the subsequent drm_crtc_index() to OOPS.
Daniel Vetter says that the fundamental issue seems to be confusion in
the encoder selection, and this isn't the right fix, but while he chases
down the proper fix, this at least avoids the NULL pointer dereference
and makes Ted's docking station work again.
Reported-bisected-and-tested-by: Theodore Ts'o <tytso@mit.edu>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Mani Nikula <jani.nikula@linux.intel.com>
Cc: Dave Airlie <airlied@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Running generic_buffer without enabling any channel of the
sensor will fail without printing any error message.
Add an error message that indicates buffer enable failed.
Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Acked-by: Hartmut Knaack <knaack.h@gmx.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
When the the sensor data uses 32 bits out of 32, generic_buffer prints
the value 0 for all data read.
In this case, the mask is shifted 32 bits, which is beyond the size of
an integer. This will lead to the mask always being 0. Before printing,
the mask is applied to the raw value, thus generating a final value of 0.
Fix the mask by shifting a 64 bit value instead of an integer.
Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Acked-by: Hartmut Knaack <knaack.h@gmx.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Fix kernel doc for the iio_dev_attr structure by adding its missing field.
Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Fix buffer name from kernel doc according to the function parameter.
Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Fix kernel docs warnings by adding the missing fields,
each with its associated description.
Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Fix kernel docs for structures and functions in order to
remove some warnings when the documentation gets generated.
Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This patch adds the missing fields in kernel docs to remove
some warnings that appear when the IIO Documentation DocBook
is generated.
Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
When setting the trigger state, the device power state is set through
buffer preenable and postdisable hooks. There is no need
to also set it in the trigger set state call.
Remove duplicate set power state from the trigger set
state call.
Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Runtime resume function is called with the data->mutex lock held.
Add a comment to indicate this.
Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Define and use a descriptive name for the repetition registers data mask,
instead of a 'magic' value.
Signed-off-by: Hartmut Knaack <knaack.h@gmx.de>
Acked-by: Irina Tirdea <irina.tirdea@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Keep the mutex locked, until the content of data->buffer has been pushed
out.
Signed-off-by: Hartmut Knaack <knaack.h@gmx.de>
Acked-by: Irina Tirdea <irina.tirdea@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Translates the magic constant numbers to named macros and add some
additional comments about their meaning.
The diff is made towards togreg branch as that branch seems to have the
most recent updates of mlx90614 driver (many are yet to be merged).
Signed-off-by: Crt Mori <cmo@melexis.com>
Acked-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
A set of three fixes for the ipr driver and one fairly major one for memory
leaks in the mq path of SCSI.
Signed-off-by: James Bottomley <JBottomley@Odin.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"A set of three fixes for the ipr driver and one fairly major one for
memory leaks in the mq path of SCSI"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: fix memory leak with scsi-mq
ipr: Fix invalid array indexing for HRRQ
ipr: Fix incorrect trace indexing
ipr: Fix locking for unit attention handling
This patch changes two variables to arrays to improve code readibility.
Signed-off-by: Teodora Baluta <teodora.baluta@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Things are calming down nicely here w.r.t. fixes. This batch includes two
week's worth since I missed to send before -rc4.
Nothing particularly scary to point out, smaller fixes here and
there. Shortlog describes it pretty well.
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Merge tag 'armsoc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"Things are calming down nicely here w.r.t. fixes. This batch
includes two week's worth since I missed to send before -rc4.
Nothing particularly scary to point out, smaller fixes here and there.
Shortlog describes it pretty well"
* tag 'armsoc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: dts: keystone: fix dt bindings to use post div register for mainpll
ARM: nomadik: disable UART0 on Nomadik boards
ARM: dts: i.MX35: Fix can support.
ARM: OMAP2+: hwmod: Fix _wait_target_ready() for hwmods without sysc
ARM: dts: add CPU OPP and regulator supply property for exynos4210
ARM: dts: Update video-phy node with syscon phandle for exynos3250
ARM: DRA7: hwmod: fix gpmc hwmod
The I2C core always reports the MODALIAS uevent as "i2c:<client name"
regardless if the driver was matched using the I2C id_table or the
of_match_table. So technically there's no need for a driver to export
the OF table since currently it's not used.
In fact, the I2C device ID table is mandatory for I2C drivers since
a i2c_device_id is passed to the driver's probe function even if the
I2C core used the OF table to match the driver.
And since the I2C core uses different tables, OF-only drivers needs to
have duplicated data that has to be kept in sync and also the dev node
compatible manufacturer prefix is stripped when reporting the MODALIAS.
To avoid the above, the I2C core behavior may be changed in the future
to not require an I2C device table for OF-only drivers and report the
OF module alias. So, it's better to also export the OF table to prevent
breaking module autoloading if that happens.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
The I2C core always reports the MODALIAS uevent as "i2c:<client name"
regardless if the driver was matched using the I2C id_table or the
of_match_table. So the driver needs to export the I2C table and this
be built into the module or udev won't have the necessary information
to auto load the correct module when the device is added.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Pull VFS fix from Al Viro:
"Spurious ENOTDIR fix"
This should fix the problems reported by Dominique Martinet and Hugh
Dickins.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
link_path_walk(): be careful when failing with ENOTDIR
In RCU mode we might end up with dentry evicted just we check
that it's a directory. In such case we should return ECHILD
rather than ENOTDIR, so that pathwalk would be retries in non-RCU
mode.
Breakage had been introduced in commit b18825a - prior to that
we were looking at nd->inode, which had been fetched before
verifying that ->d_seq was still valid. That form of check
would only be satisfied if at some point the pathname prefix
would indeed have resolved to a non-directory. The fix consists
of checking ->d_seq after we'd run into a non-directory dentry,
and failing with ECHILD in case of mismatch.
Note that all branches since 3.12 have that problem...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
We had a regression due to reuse of descriptor so we have reverted that.
Rest are driver fixes
at_hdmac and at_xdmac for residue, trannfer width, and channel config
pl330 final fix for dma fails and overflow issue
xgene resouce map fix
mv_xor big endian op fix
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Merge tag 'dmaengine-fix-4.2-rc5' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine fixes from Vinod Koul:
"We had a regression due to reuse of descriptor so we have reverted
that.
The rest are driver fixes:
- at_hdmac and at_xdmac for residue, trannfer width, and channel config
- pl330 final fix for dma fails and overflow issue
- xgene resouce map fix
- mv_xor big endian op fix"
* tag 'dmaengine-fix-4.2-rc5' of git://git.infradead.org/users/vkoul/slave-dma:
Revert "dmaengine: virt-dma: don't always free descriptor upon completion"
dmaengine: mv_xor: fix big endian operation in register mode
dmaengine: xgene-dma: Fix the resource map to handle overlapping
dmaengine: at_xdmac: fix transfer data width in at_xdmac_prep_slave_sg()
dmaengine: at_hdmac: fix residue computation
dmaengine: at_xdmac: fix bug about channel configuration
dmaengine: pl330: Really fix choppy sound because of wrong residue calculation
dmaengine: pl330: Fix overflow when reporting residue in memcpy
Pull irq fixlets from Thomas Gleixner:
"Just two updates to the maintainers file"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
MAINTAINERS: Appoint Jiang and Marc as irqdomain maintainers
MAINTAINERS: Appoint Marc Zyngier as irqchips co-maintainer
Pull x86 fixes from Ingo Molnar:
"Fallout from the recent NMI fixes: make x86 LDT handling more robust.
Also some EFI fixes"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/ldt: Make modify_ldt synchronous
x86/xen: Probe target addresses in set_aliased_prot() before the hypercall
x86/irq: Use the caller provided polarity setting in mp_check_pin_attr()
efi: Check for NULL efi kernel parameters
x86/efi: Use all 64 bit of efi_memmap in setup_e820()
SATA_PLL_SOFT_RESET bit of CTRL_CORE_SMA_SW_0 must be toggled
between a SATA DPLL unlock and re-lock to prevent SATA lockup.
Introduce a new DT parameter 'syscon-pllreset' to provide the syscon
regmap access to this register which sits in the control module.
If the register is not provided we fallback to the old behaviour
i.e. SATA DPLL refclk will not be disabled and we prevent SoC low
power states.
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
sun4i_usb_phy_set_squelch_detect is used by other code, which may be built
as a module, so it should be exported.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
