- Re-enable SNVS power key for imx6q-logicpd board which was accidentally
disabled by a SoC level change.
- Fix I2C switches on vf610-zii-scu4-aib board by specifying property
i2c-mux-idle-disconnect.
- A fix on imx-scu API that reads UID from firmware to avoid kernel NULL
pointer dump.
- A series from Anson to correct i.MX7 GPT and i.MX8 USDHC IPG clock.
- A fix on DRM_MSM Kconfig regression on i.MX5 by adding the option
explicitly into imx_v6_v7_defconfig.
- Fix ARM regulator states issue for zii-ultra board, which is impacting
stability of the board.
- A correction on CPU core idle state name for LayerScape LX2160A SoC.
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Merge tag 'imx-fixes-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into arm/fixes
i.MX fixes for 5.4:
- Re-enable SNVS power key for imx6q-logicpd board which was accidentally
disabled by a SoC level change.
- Fix I2C switches on vf610-zii-scu4-aib board by specifying property
i2c-mux-idle-disconnect.
- A fix on imx-scu API that reads UID from firmware to avoid kernel NULL
pointer dump.
- A series from Anson to correct i.MX7 GPT and i.MX8 USDHC IPG clock.
- A fix on DRM_MSM Kconfig regression on i.MX5 by adding the option
explicitly into imx_v6_v7_defconfig.
- Fix ARM regulator states issue for zii-ultra board, which is impacting
stability of the board.
- A correction on CPU core idle state name for LayerScape LX2160A SoC.
* tag 'imx-fixes-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
ARM: imx_v6_v7_defconfig: Enable CONFIG_DRM_MSM
arm64: dts: imx8mn: Use correct clock for usdhc's ipg clk
arm64: dts: imx8mm: Use correct clock for usdhc's ipg clk
arm64: dts: imx8mq: Use correct clock for usdhc's ipg clk
ARM: dts: imx7s: Correct GPT's ipg clock source
ARM: dts: vf610-zii-scu4-aib: Specify 'i2c-mux-idle-disconnect'
ARM: dts: imx6q-logicpd: Re-Enable SNVS power key
arm64: dts: lx2160a: Correct CPU core idle state name
arm64: dts: zii-ultra: fix ARM regulator states
soc: imx: imx-scu: Getting UID from SCU should have response
Link: https://lore.kernel.org/r/20191017141851.GA22506@dragon
Signed-off-by: Olof Johansson <olof@lixom.net>
More fixes for omap variants:
- Update more panel options in omap2plus_defconfig that got changed
as we moved to use generic LCD panels
- Remove unused twl_keypad for logicpd-torpedo-som to avoid boot
time warnings. This is only a cosmetic fix, but at least dmesg output
is now getting more readable after all the fixes to remove pointless
warnings
- Fix gpu_cm node name as we still have a non-standard node name
dependency for clocks. This should eventually get fixed by use
of domain specific compatible property
- Fix use of i2c-mux-idle-disconnect for m3874-iceboard
- Use level interrupt for omap4 & 5 wlcore to avoid lost edge
interrupts
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Merge tag 'omap-for-v5.4/fixes-rc3-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into arm/fixes
Fixes for omaps for v5.4-rc cycle
More fixes for omap variants:
- Update more panel options in omap2plus_defconfig that got changed
as we moved to use generic LCD panels
- Remove unused twl_keypad for logicpd-torpedo-som to avoid boot
time warnings. This is only a cosmetic fix, but at least dmesg output
is now getting more readable after all the fixes to remove pointless
warnings
- Fix gpu_cm node name as we still have a non-standard node name
dependency for clocks. This should eventually get fixed by use
of domain specific compatible property
- Fix use of i2c-mux-idle-disconnect for m3874-iceboard
- Use level interrupt for omap4 & 5 wlcore to avoid lost edge
interrupts
* tag 'omap-for-v5.4/fixes-rc3-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: dts: Use level interrupt for omap4 & 5 wlcore
ARM: dts: am3874-iceboard: Fix 'i2c-mux-idle-disconnect' usage
ARM: dts: omap5: fix gpu_cm clock provider name
ARM: dts: logicpd-torpedo-som: Remove twl_keypad
ARM: omap2plus_defconfig: Fix selected panels after generic panel changes
Link: https://lore.kernel.org/r/pull-1571242890-118432@atomide.com
Signed-off-by: Olof Johansson <olof@lixom.net>
for 5.4, please pull the following:
- Rayangonda fixes the GPIO pins assignment for the Stringray SoCs
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Merge tag 'arm-soc/for-5.4/devicetree-arm64-fixes' of https://github.com/Broadcom/stblinux into arm/fixes
This pull request contains Broadcom ARM64-based SoCs Device Tree fixes
for 5.4, please pull the following:
- Rayangonda fixes the GPIO pins assignment for the Stringray SoCs
* tag 'arm-soc/for-5.4/devicetree-arm64-fixes' of https://github.com/Broadcom/stblinux:
arm64: dts: Fix gpio to pinmux mapping
Link: https://lore.kernel.org/r/20191015172356.9650-2-f.fainelli@gmail.com
Signed-off-by: Olof Johansson <olof@lixom.net>
Since we now have bindings for Mali Midgard GPUs, let's use them to
describe Juno's GPU subsystem, if only because we can. Juno sports a
Mali-T624 integrated behind an MMU-400 (as a gesture towards
virtualisation), in their own dedicated power domain with DVFS
controlled by the SCP.
CC: Liviu Dudau <liviu.dudau@arm.com>
CC: Sudeep Holla <sudeep.holla@arm.com>
CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
bcm2835-rpi.dtsi defines the behavior of the ACT LED, which is available
on all Raspberry Pi boards. But there is no driver for this particual
GPIO on CM3 in mainline yet, so this node was left incomplete without
the actual GPIO definition. Since commit 025bf37725 ("gpio: Fix return
value mismatch of function gpiod_get_from_of_node()") this causing probe
issues of the leds-gpio driver for users of the CM3 dtsi file.
leds-gpio: probe of leds failed with error -2
Until we have the necessary GPIO driver hide the ACT node for CM3
to avoid this.
Reported-by: Fredrik Yhlen <fredrik.yhlen@endian.se>
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Fixes: a54fe8a6cf ("ARM: dts: add Raspberry Pi Compute Module 3 and IO board")
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
I noticed that when probed with ti-sysc, watchdog can trigger on am3, am4
and dra7 causing a device reset.
Turns out I made several mistakes implementing the watchdog quirk handling:
1. We must do both writes to spr register
2. We must also call the reset quirk on disable
3. On am3 and am4 we need to also set swsup quirk flag
I probably only tested this earlier with watchdog service running when the
watchdog never gets disabled.
Fixes: 4e23be473e ("bus: ti-sysc: Add support for module specific reset quirks")
Signed-off-by: Tony Lindgren <tony@atomide.com>
The OMAP3 ISP IOMMU does not have any reset lines, so it didn't
need any pdata previously. The OMAP IOMMU driver now requires the
platform data ops for device_enable/idle on all the IOMMU devices
after commit db8918f61d ("iommu/omap: streamline enable/disable
through runtime pm callbacks") to enable/disable the clocks properly
and maintain the reference count and the omap_hwmod state machine.
So, add these callbacks through iommu pdata quirks for the OMAP3
ISP IOMMU.
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
The OMAP IOMMU driver requires the device_enable/idle platform
data ops on all the IOMMU devices to be able to enable and disable
the clocks after commit db8918f61d ("iommu/omap: streamline
enable/disable through runtime pm callbacks"). Plug in these
pdata ops for all the existing IOMMUs through pdata quirks to
maintain functionality.
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
DA850 EVM has been converted to use GPIO backlight device
for display backlight GPIO control.
Enable the GPIO backlight module in davinci_all_defconfig
to keep backlight support working.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
[nsekhar@ti.com: edits to commit message for context]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
dm365 have only single McBSP, so the device name is without .0
Fixes: 0c750e1fe4 ("ARM: davinci: dm365: Add dma_slave_map to edma")
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
mail address for a former contributor.
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Merge tag 'tags/bcm2835-maintainers-next-2019-10-15' into maintainers/next
This pull request clarifies maintainership of the BCM2711 and adds a replacement
mail address for a former contributor.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
The commit e7774049ff ("ARM: dts: bcm283x: Define MMC interfaces at
board level") accidently dropped the bus width for the sdhci on the
RPi Zero W, because the board file was relying on the defaults
from bcm2835-rpi.dtsi. So fix this performance regression by adding
the bus width to the board file.
Fixes: e7774049ff ("ARM: dts: bcm283x: Define MMC interfaces at board level")
Reported-by: Phil Elwell <phil@raspberrypi.org>
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Since commit 2eba69071b ("drm/msm: Remove Kconfig default") the
CONFIG_DRM_MSM option is no longer selected by default on i.MX5.
Explicitly select CONFIG_DRM_MSM so that we can get GPU support
by default on i.MX51 and i.MX53.
Fixes: 2eba69071b ("drm/msm: Remove Kconfig default")
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
On i.MX8MQ, usdhc's ipg clock is from IMX8MQ_CLK_IPG_ROOT,
assign it explicitly instead of using IMX8MQ_CLK_DUMMY.
Fixes: 748f908cc8 ("arm64: add basic DTS for i.MX8MQ")
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
i.MX7S/D's GPT ipg clock should be from GPT clock root and
controlled by CCM's GPT CCGR, using correct clock source for
GPT ipg clock instead of IMX7D_CLK_DUMMY.
Fixes: 3ef79ca6bd ("ARM: dts: imx7d: use imx7s.dtsi as base device tree")
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Specify 'i2c-mux-idle-disconnect' for both I2C switches present on the
board, since both are connected to the same parent bus and all of
their children have the same I2C address.
Fixes: ca4b4d373f ("ARM: dts: vf610: Add ZII SCU4 AIB board")
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Cory Tusar <cory.tusar@zii.aero>
Cc: Jeff White <jeff.white@zii.aero>
Cc: Rick Ramstetter <rick@anteaterllc.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Tested-by: Chris Healy <cphealy@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
A previous patch disabled the SNVS power key by default which
breaks the ability for the imx6q-logicpd board to wake from sleep.
This patch re-enables this feature for this board.
Fixes: 770856f0da ("ARM: dts: imx6qdl: Enable SNVS power key according to board design")
Signed-off-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
lx2160a support PW15 but not PW20, correct name to avoid confusing.
Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
Fixes: 00c5ce8ac0 ("arm64: dts: lx2160a: add cpu idle support")
Acked-by: Li Yang <leoyang.li@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
- Removed locked down from tracefs itself and moved it to the trace
directory. Having the open functions there do the lockdown checks.
- Fixed a few races with opening an instance file and the instance being
deleted (Discovered during the locked down updates). Kept separate
from the clean up code such that they can be backported to stable
easier.
- Cleaned up and consolidated the checks done when opening a trace
file, as there were multiple checks that need to be done, and it
did not make sense having them done in each open instance.
- Fixed a regression in the record mcount code.
- Small hw_lat detector tracer fixes.
- A trace_pipe read fix due to not initializing trace_seq.
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Merge tag 'trace-v5.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fixes from Steven Rostedt:
"A few tracing fixes:
- Remove lockdown from tracefs itself and moved it to the trace
directory. Have the open functions there do the lockdown checks.
- Fix a few races with opening an instance file and the instance
being deleted (Discovered during the lockdown updates). Kept
separate from the clean up code such that they can be backported to
stable easier.
- Clean up and consolidated the checks done when opening a trace
file, as there were multiple checks that need to be done, and it
did not make sense having them done in each open instance.
- Fix a regression in the record mcount code.
- Small hw_lat detector tracer fixes.
- A trace_pipe read fix due to not initializing trace_seq"
* tag 'trace-v5.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing: Initialize iter->seq after zeroing in tracing_read_pipe()
tracing/hwlat: Don't ignore outer-loop duration when calculating max_latency
tracing/hwlat: Report total time spent in all NMIs during the sample
recordmcount: Fix nop_mcount() function
tracing: Do not create tracefs files if tracefs lockdown is in effect
tracing: Add locked_down checks to the open calls of files created for tracefs
tracing: Add tracing_check_open_get_tr()
tracing: Have trace events system open call tracing_open_generic_tr()
tracing: Get trace_array reference for available_tracers files
ftrace: Get a reference counter for the trace_array on filter files
tracefs: Revert ccbd54ff54 ("tracefs: Restrict tracefs when the kernel is locked down")
Update/fix inspur-ipsps1 and k10temp Documentation
Fix nct7904 driver
Fix HWMON_P_MIN_ALARM mask in hwmon core
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Merge tag 'hwmon-for-v5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon fixes from Guenter Roeck:
- Update/fix inspur-ipsps1 and k10temp Documentation
- Fix nct7904 driver
- Fix HWMON_P_MIN_ALARM mask in hwmon core
* tag 'hwmon-for-v5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: docs: Extend inspur-ipsps1 title underline
hwmon: (nct7904) Add array fan_alarm and vsen_alarm to store the alarms in nct7904_data struct.
docs: hwmon: Include 'inspur-ipsps1.rst' into docs
hwmon: Fix HWMON_P_MIN_ALARM mask
hwmon: (k10temp) Update documentation and add temp2_input info
hwmon: (nct7904) Fix the incorrect value of vsen_mask in nct7904_data struct
- spi-nor: Fix for a regression in write_sr()
- rawnand: Regression fix for the au1550nd driver
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Merge tag 'fixes-for-5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux
Pull MTD fixes from Richard Weinberger:
"Two fixes for MTD:
- spi-nor: Fix for a regression in write_sr()
- rawnand: Regression fix for the au1550nd driver"
* tag 'fixes-for-5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux:
mtd: rawnand: au1550nd: Fix au_read_buf16() prototype
mtd: spi-nor: Fix direction of the write_sr() transfer
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Merge tag 'for-linus-20191012' of git://git.kernel.dk/linux-block
Pull io_uring fix from Jens Axboe:
"Single small fix for a regression in the sequence logic for linked
commands"
* tag 'for-linus-20191012' of git://git.kernel.dk/linux-block:
io_uring: fix sequence logic for timeout requests
A customer reported the following softlockup:
[899688.160002] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [test.sh:16464]
[899688.160002] CPU: 0 PID: 16464 Comm: test.sh Not tainted 4.12.14-6.23-azure #1 SLE12-SP4
[899688.160002] RIP: 0010:up_write+0x1a/0x30
[899688.160002] Kernel panic - not syncing: softlockup: hung tasks
[899688.160002] RIP: 0010:up_write+0x1a/0x30
[899688.160002] RSP: 0018:ffffa86784d4fde8 EFLAGS: 00000257 ORIG_RAX: ffffffffffffff12
[899688.160002] RAX: ffffffff970fea00 RBX: 0000000000000001 RCX: 0000000000000000
[899688.160002] RDX: ffffffff00000001 RSI: 0000000000000080 RDI: ffffffff970fea00
[899688.160002] RBP: ffffffffffffffff R08: ffffffffffffffff R09: 0000000000000000
[899688.160002] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8b59014720d8
[899688.160002] R13: ffff8b59014720c0 R14: ffff8b5901471090 R15: ffff8b5901470000
[899688.160002] tracing_read_pipe+0x336/0x3c0
[899688.160002] __vfs_read+0x26/0x140
[899688.160002] vfs_read+0x87/0x130
[899688.160002] SyS_read+0x42/0x90
[899688.160002] do_syscall_64+0x74/0x160
It caught the process in the middle of trace_access_unlock(). There is
no loop. So, it must be looping in the caller tracing_read_pipe()
via the "waitagain" label.
Crashdump analyze uncovered that iter->seq was completely zeroed
at this point, including iter->seq.seq.size. It means that
print_trace_line() was never able to print anything and
there was no forward progress.
The culprit seems to be in the code:
/* reset all but tr, trace, and overruns */
memset(&iter->seq, 0,
sizeof(struct trace_iterator) -
offsetof(struct trace_iterator, seq));
It was added by the commit 53d0aa7730 ("ftrace:
add logic to record overruns"). It was v2.6.27-rc1.
It was the time when iter->seq looked like:
struct trace_seq {
unsigned char buffer[PAGE_SIZE];
unsigned int len;
};
There was no "size" variable and zeroing was perfectly fine.
The solution is to reinitialize the structure after or without
zeroing.
Link: http://lkml.kernel.org/r/20191011142134.11997-1-pmladek@suse.com
Signed-off-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
max_latency is intended to record the maximum ever observed hardware
latency, which may occur in either part of the loop (inner/outer). So
we need to also consider the outer-loop sample when updating
max_latency.
Link: http://lkml.kernel.org/r/157073345463.17189.18124025522664682811.stgit@srivatsa-ubuntu
Fixes: e7c15cd8a1 ("tracing: Added hardware latency tracer")
Cc: stable@vger.kernel.org
Signed-off-by: Srivatsa S. Bhat (VMware) <srivatsa@csail.mit.edu>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
nmi_total_ts is supposed to record the total time spent in *all* NMIs
that occur on the given CPU during the (active portion of the)
sampling window. However, the code seems to be overwriting this
variable for each NMI, thereby only recording the time spent in the
most recent NMI. Fix it by accumulating the duration instead.
Link: http://lkml.kernel.org/r/157073343544.17189.13911783866738671133.stgit@srivatsa-ubuntu
Fixes: 7b2c862501 ("tracing: Add NMI tracing in hwlat detector")
Cc: stable@vger.kernel.org
Signed-off-by: Srivatsa S. Bhat (VMware) <srivatsa@csail.mit.edu>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
The removal of the longjmp code in recordmcount.c mistakenly made the return
of make_nop() being negative an exit of nop_mcount(). It should not exit the
routine, but instead just not process that part of the code. By exiting with
an error code, it would cause the update of recordmcount to fail some files
which would fail the build if ftrace function tracing was enabled.
Link: http://lkml.kernel.org/r/20191009110538.5909fec6@gandalf.local.home
Reported-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Tested-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Fixes: 3f1df12019 ("recordmcount: Rewrite error/success handling")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
If on boot up, lockdown is activated for tracefs, don't even bother creating
the files. This can also prevent instances from being created if lockdown is
in effect.
Link: http://lkml.kernel.org/r/CAHk-=whC6Ji=fWnjh2+eS4b15TnbsS4VPVtvBOwCy1jjEG_JHQ@mail.gmail.com
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Added various checks on open tracefs calls to see if tracefs is in lockdown
mode, and if so, to return -EPERM.
Note, the event format files (which are basically standard on all machines)
as well as the enabled_functions file (which shows what is currently being
traced) are not lockde down. Perhaps they should be, but it seems counter
intuitive to lockdown information to help you know if the system has been
modified.
Link: http://lkml.kernel.org/r/CAHk-=wj7fGPKUspr579Cii-w_y60PtRaiDgKuxVtBAMK0VNNkA@mail.gmail.com
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Currently, most files in the tracefs directory test if tracing_disabled is
set. If so, it should return -ENODEV. The tracing_disabled is called when
tracing is found to be broken. Originally it was done in case the ring
buffer was found to be corrupted, and we wanted to prevent reading it from
crashing the kernel. But it's also called if a tracing selftest fails on
boot. It's a one way switch. That is, once it is triggered, tracing is
disabled until reboot.
As most tracefs files can also be used by instances in the tracefs
directory, they need to be carefully done. Each instance has a trace_array
associated to it, and when the instance is removed, the trace_array is
freed. But if an instance is opened with a reference to the trace_array,
then it requires looking up the trace_array to get its ref counter (as there
could be a race with it being deleted and the open itself). Once it is
found, a reference is added to prevent the instance from being removed (and
the trace_array associated with it freed).
Combine the two checks (tracing_disabled and trace_array_get()) into a
single helper function. This will also make it easier to add lockdown to
tracefs later.
Link: http://lkml.kernel.org/r/20191011135458.7399da44@gandalf.local.home
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Instead of having the trace events system open call open code the taking of
the trace_array descriptor (with trace_array_get()) and then calling
trace_open_generic(), have it use the tracing_open_generic_tr() that does
the combination of the two. This requires making tracing_open_generic_tr()
global.
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
As instances may have different tracers available, we need to look at the
trace_array descriptor that shows the list of the available tracers for the
instance. But there's a race between opening the file and an admin
deleting the instance. The trace_array_get() needs to be called before
accessing the trace_array.
Cc: stable@vger.kernel.org
Fixes: 607e2ea167 ("tracing: Set up infrastructure to allow tracers for instances")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
The ftrace set_ftrace_filter and set_ftrace_notrace files are specific for
an instance now. They need to take a reference to the instance otherwise
there could be a race between accessing the files and deleting the instance.
It wasn't until the :mod: caching where these file operations started
referencing the trace_array directly.
Cc: stable@vger.kernel.org
Fixes: 673feb9d76 ("ftrace: Add :mod: caching infrastructure to trace_array")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Running the latest kernel through my "make instances" stress tests, I
triggered the following bug (with KASAN and kmemleak enabled):
mkdir invoked oom-killer:
gfp_mask=0x40cd0(GFP_KERNEL|__GFP_COMP|__GFP_RECLAIMABLE), order=0,
oom_score_adj=0
CPU: 1 PID: 2229 Comm: mkdir Not tainted 5.4.0-rc2-test #325
Hardware name: MSI MS-7823/CSM-H87M-G43 (MS-7823), BIOS V1.6 02/22/2014
Call Trace:
dump_stack+0x64/0x8c
dump_header+0x43/0x3b7
? trace_hardirqs_on+0x48/0x4a
oom_kill_process+0x68/0x2d5
out_of_memory+0x2aa/0x2d0
__alloc_pages_nodemask+0x96d/0xb67
__alloc_pages_node+0x19/0x1e
alloc_slab_page+0x17/0x45
new_slab+0xd0/0x234
___slab_alloc.constprop.86+0x18f/0x336
? alloc_inode+0x2c/0x74
? irq_trace+0x12/0x1e
? tracer_hardirqs_off+0x1d/0xd7
? __slab_alloc.constprop.85+0x21/0x53
__slab_alloc.constprop.85+0x31/0x53
? __slab_alloc.constprop.85+0x31/0x53
? alloc_inode+0x2c/0x74
kmem_cache_alloc+0x50/0x179
? alloc_inode+0x2c/0x74
alloc_inode+0x2c/0x74
new_inode_pseudo+0xf/0x48
new_inode+0x15/0x25
tracefs_get_inode+0x23/0x7c
? lookup_one_len+0x54/0x6c
tracefs_create_file+0x53/0x11d
trace_create_file+0x15/0x33
event_create_dir+0x2a3/0x34b
__trace_add_new_event+0x1c/0x26
event_trace_add_tracer+0x56/0x86
trace_array_create+0x13e/0x1e1
instance_mkdir+0x8/0x17
tracefs_syscall_mkdir+0x39/0x50
? get_dname+0x31/0x31
vfs_mkdir+0x78/0xa3
do_mkdirat+0x71/0xb0
sys_mkdir+0x19/0x1b
do_fast_syscall_32+0xb0/0xed
I bisected this down to the addition of the proxy_ops into tracefs for
lockdown. It appears that the allocation of the proxy_ops and then freeing
it in the destroy_inode callback, is causing havoc with the memory system.
Reading the documentation about destroy_inode and talking with Linus about
this, this is buggy and wrong. When defining the destroy_inode() method, it
is expected that the destroy_inode() will also free the inode, and not just
the extra allocations done in the creation of the inode. The faulty commit
causes a memory leak of the inode data structure when they are deleted.
Instead of allocating the proxy_ops (and then having to free it) the checks
should be done by the open functions themselves, and not hack into the
tracefs directory. First revert the tracefs updates for locked_down and then
later we can add the locked_down checks in the kernel/trace files.
Link: http://lkml.kernel.org/r/20191011135458.7399da44@gandalf.local.home
Fixes: ccbd54ff54 ("tracefs: Restrict tracefs when the kernel is locked down")
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Here are some small char/misc driver fixes for 5.4-rc3.
Nothing huge here. Some binder driver fixes (although it is still being
discussed if these all fix the reported issues or not, so more might be
coming later), some mei device ids and fixes, and a google firmware
driver bugfix that fixes a regression, as well as some other tiny fixes.
All have been in linux-next with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg KH:
"Here are some small char/misc driver fixes for 5.4-rc3.
Nothing huge here. Some binder driver fixes (although it is still
being discussed if these all fix the reported issues or not, so more
might be coming later), some mei device ids and fixes, and a google
firmware driver bugfix that fixes a regression, as well as some other
tiny fixes.
All have been in linux-next with no reported issues"
* tag 'char-misc-5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
firmware: google: increment VPD key_len properly
w1: ds250x: Fix build error without CRC16
virt: vbox: fix memory leak in hgcm_call_preprocess_linaddr
binder: Fix comment headers on binder_alloc_prepare_to_free()
binder: prevent UAF read in print_binder_transaction_log_entry()
misc: fastrpc: prevent memory leak in fastrpc_dma_buf_attach
mei: avoid FW version request on Ibex Peak and earlier
mei: me: add comet point (lake) LP device ids
Here are some staging and IIO driver fixes for 5.4-rc3.
The "biggest" thing here is a removal of the fbtft device and flexfb
code as they have been abandoned by their authors and are no longer
needed for that hardware.
Other than that, the usual amount of staging driver and iio driver fixes
for reported issues, and some speakup sysfs file documentation, which
has been long awaited for.
All have been in linux-next with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging/IIO driver fixes from Greg KH:
"Here are some staging and IIO driver fixes for 5.4-rc3.
The "biggest" thing here is a removal of the fbtft device and flexfb
code as they have been abandoned by their authors and are no longer
needed for that hardware.
Other than that, the usual amount of staging driver and iio driver
fixes for reported issues, and some speakup sysfs file documentation,
which has been long awaited for.
All have been in linux-next with no reported issues"
* tag 'staging-5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (32 commits)
iio: Fix an undefied reference error in noa1305_probe
iio: light: opt3001: fix mutex unlock race
iio: adc: ad799x: fix probe error handling
iio: light: add missing vcnl4040 of_compatible
iio: light: fix vcnl4000 devicetree hooks
iio: imu: st_lsm6dsx: fix waitime for st_lsm6dsx i2c controller
iio: adc: axp288: Override TS pin bias current for some models
iio: imu: adis16400: fix memory leak
iio: imu: adis16400: release allocated memory on failure
iio: adc: stm32-adc: fix a race when using several adcs with dma and irq
iio: adc: stm32-adc: move registers definitions
iio: accel: adxl372: Perform a reset at start up
iio: accel: adxl372: Fix push to buffers lost samples
iio: accel: adxl372: Fix/remove limitation for FIFO samples
iio: adc: hx711: fix bug in sampling of data
staging: vt6655: Fix memory leak in vt6655_probe
staging: exfat: Use kvzalloc() instead of kzalloc() for exfat_sb_info
Staging: fbtft: fix memory leak in fbtft_framebuffer_alloc
staging: speakup: document sysfs attributes
staging: rtl8188eu: fix HighestRate check in odm_ARFBRefresh_8188E()
...
Here are some small tty and serial driver fixes for 5.4-rc3 that resolve
a number of reported issues and regressions.
None of these are huge, full details are in the shortlog. THere's also
a MAINTAINERS update that I think you might have already taken in your
tree already, but git should handle that merge easily.
All have been in linux-next with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial driver fixes from Greg KH:
"Here are some small tty and serial driver fixes for 5.4-rc3 that
resolve a number of reported issues and regressions.
None of these are huge, full details are in the shortlog. There's also
a MAINTAINERS update that I think you might have already taken in your
tree already, but git should handle that merge easily.
All have been in linux-next with no reported issues"
* tag 'tty-5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
MAINTAINERS: kgdb: Add myself as a reviewer for kgdb/kdb
tty: serial: imx: Use platform_get_irq_optional() for optional IRQs
serial: fix kernel-doc warning in comments
serial: 8250_omap: Fix gpio check for auto RTS/CTS
serial: mctrl_gpio: Check for NULL pointer
tty: serial: fsl_lpuart: Fix lpuart_flush_buffer()
tty: serial: Fix PORT_LINFLEXUART definition
tty: n_hdlc: fix build on SPARC
serial: uartps: Fix uartps_major handling
serial: uartlite: fix exit path null pointer
tty: serial: linflexuart: Fix magic SysRq handling
serial: sh-sci: Use platform_get_irq_optional() for optional interrupts
dt-bindings: serial: sh-sci: Document r8a774b1 bindings
serial/sifive: select SERIAL_EARLYCON
tty: serial: rda: Fix the link time qualifier of 'rda_uart_exit()'
tty: serial: owl: Fix the link time qualifier of 'owl_uart_exit()'
Here are a lot of small USB driver fixes for 5.4-rc3.
syzbot has stepped up its testing of the USB driver stack, now able to
trigger fun race conditions between disconnect and probe functions.
Because of that we have a lot of fixes in here from Johan and others
fixing these reported issues that have been around since almost all
time.
We also are just deleting the rio500 driver, making all of the syzbot
bugs found in it moot as it turns out no one has been using it for years
as there is a userspace version that is being used instead.
There are also a number of other small fixes in here, all resolving
reported issues or regressions.
All have been in linux-next without any reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are a lot of small USB driver fixes for 5.4-rc3.
syzbot has stepped up its testing of the USB driver stack, now able to
trigger fun race conditions between disconnect and probe functions.
Because of that we have a lot of fixes in here from Johan and others
fixing these reported issues that have been around since almost all
time.
We also are just deleting the rio500 driver, making all of the syzbot
bugs found in it moot as it turns out no one has been using it for
years as there is a userspace version that is being used instead.
There are also a number of other small fixes in here, all resolving
reported issues or regressions.
All have been in linux-next without any reported issues"
* tag 'usb-5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (65 commits)
USB: yurex: fix NULL-derefs on disconnect
USB: iowarrior: use pr_err()
USB: iowarrior: drop redundant iowarrior mutex
USB: iowarrior: drop redundant disconnect mutex
USB: iowarrior: fix use-after-free after driver unbind
USB: iowarrior: fix use-after-free on release
USB: iowarrior: fix use-after-free on disconnect
USB: chaoskey: fix use-after-free on release
USB: adutux: fix use-after-free on release
USB: ldusb: fix NULL-derefs on driver unbind
USB: legousbtower: fix use-after-free on release
usb: cdns3: Fix for incorrect DMA mask.
usb: cdns3: fix cdns3_core_init_role()
usb: cdns3: gadget: Fix full-speed mode
USB: usb-skeleton: drop redundant in-urb check
USB: usb-skeleton: fix use-after-free after driver unbind
USB: usb-skeleton: fix NULL-deref on disconnect
usb:cdns3: Fix for CV CH9 running with g_zero driver.
usb: dwc3: Remove dev_err() on platform_get_irq() failure
usb: dwc3: Switch to platform_get_irq_byname_optional()
...
Pull scheduler fixes from Ingo Molnar:
"Two fixes: a guest-cputime accounting fix, and a cgroup bandwidth
quota precision fix"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/vtime: Fix guest/system mis-accounting on task switch
sched/fair: Scale bandwidth quota and period without losing quota/period ratio precision
Pull perf fixes from Ingo Molnar:
"Mostly tooling fixes, but also a couple of updates for new Intel
models (which are technically hw-enablement, but to users it's a fix
to perf behavior on those new CPUs - hope this is fine), an AUX
inheritance fix, event time-sharing fix, and a fix for lost non-perf
NMI events on AMD systems"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits)
perf/x86/cstate: Add Tiger Lake CPU support
perf/x86/msr: Add Tiger Lake CPU support
perf/x86/intel: Add Tiger Lake CPU support
perf/x86/cstate: Update C-state counters for Ice Lake
perf/x86/msr: Add new CPU model numbers for Ice Lake
perf/x86/cstate: Add Comet Lake CPU support
perf/x86/msr: Add Comet Lake CPU support
perf/x86/intel: Add Comet Lake CPU support
perf/x86/amd: Change/fix NMI latency mitigation to use a timestamp
perf/core: Fix corner case in perf_rotate_context()
perf/core: Rework memory accounting in perf_mmap()
perf/core: Fix inheritance of aux_output groups
perf annotate: Don't return -1 for error when doing BPF disassembly
perf annotate: Return appropriate error code for allocation failures
perf annotate: Fix arch specific ->init() failure errors
perf annotate: Propagate the symbol__annotate() error return
perf annotate: Fix the signedness of failure returns
perf annotate: Propagate perf_env__arch() error
perf evsel: Fall back to global 'perf_env' in perf_evsel__env()
perf tools: Propagate get_cpuid() error
...
Pull EFI fixes from Ingo Molnar:
"Misc EFI fixes all across the map: CPER error report fixes, fixes to
TPM event log parsing, fix for a kexec hang, a Sparse fix and other
fixes"
* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
efi/tpm: Fix sanity check of unsigned tbl_size being less than zero
efi/x86: Do not clean dummy variable in kexec path
efi: Make unexported efi_rci2_sysfs_init() static
efi/tpm: Only set 'efi_tpm_final_log_size' after successful event log parsing
efi/tpm: Don't traverse an event log with no events
efi/tpm: Don't access event->count when it isn't mapped
efivar/ssdt: Don't iterate over EFI vars if no SSDT override was specified
efi/cper: Fix endianness of PCIe class code
Pull x86 fixes from Ingo Molnar:
"A handful of fixes: a kexec linking fix, an AMD MWAITX fix, a vmware
guest support fix when built under Clang, and new CPU model number
definitions"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/cpu: Add Comet Lake to the Intel CPU models header
lib/string: Make memzero_explicit() inline instead of external
x86/cpu/vmware: Use the full form of INL in VMWARE_PORT
x86/asm: Fix MWAITX C-state hint value
Pull x86 license tag fixlets from Ingo Molnar:
"Fix a couple of SPDX tags in x86 headers to follow the canonical
pattern"
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86: Use the correct SPDX License Identifier in headers
Some RISC-V fixes for v5.4-rc3:
- Fix several bugs in the breakpoint trap handler
- Drop an unnecessary loop around calls to preempt_schedule_irq()
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Merge tag 'riscv/for-v5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Paul Walmsley:
- Fix several bugs in the breakpoint trap handler
- Drop an unnecessary loop around calls to preempt_schedule_irq()
* tag 'riscv/for-v5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
RISC-V: entry: Remove unneeded need_resched() loop
riscv: Correct the handling of unexpected ebreak in do_trap_break()
riscv: avoid sending a SIGTRAP to a user thread trapped in WARN()
riscv: avoid kernel hangs when trapped in BUG()
- Build fixes for CONFIG_OPTIMIZE_INLINING=y builds in which the
compiler may choose not to inline __xchg() & __cmpxchg().
- A build fix for Loongson configurations with GCC 9.x.
- Expose some extra HWCAP bits to indicate support for various
instruction set extensions to userland.
- Fix bad stack access in firmware handling code for old SNI
RM200/300/400 machines.
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Merge tag 'mips_fixes_5.4_2' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux
Pull MIPS fixes from Paul Burton:
- Build fixes for CONFIG_OPTIMIZE_INLINING=y builds in which the
compiler may choose not to inline __xchg() & __cmpxchg().
- A build fix for Loongson configurations with GCC 9.x.
- Expose some extra HWCAP bits to indicate support for various
instruction set extensions to userland.
- Fix bad stack access in firmware handling code for old SNI
RM200/300/400 machines.
* tag 'mips_fixes_5.4_2' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
MIPS: Disable Loongson MMI instructions for kernel build
MIPS: elf_hwcap: Export userspace ASEs
MIPS: fw: sni: Fix out of bounds init of o32 stack
MIPS: include: Mark __xchg as __always_inline
MIPS: include: Mark __cmpxchg as __always_inline
Fix a kernel crash in spufs_create_root() on Cell machines, since the new mount
API went in.
Fix a regression in our KVM code caused by our recent PCR changes.
Avoid a warning message about a failing hypervisor API on systems that don't
have that API.
A couple of minor build fixes.
Thanks to:
Alexey Kardashevskiy, Alistair Popple, Desnes A. Nunes do Rosario, Emmanuel
Nicolet, Jordan Niethe, Laurent Dufour, Stephen Rothwell.
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Merge tag 'powerpc-5.4-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"Fix a kernel crash in spufs_create_root() on Cell machines, since the
new mount API went in.
Fix a regression in our KVM code caused by our recent PCR changes.
Avoid a warning message about a failing hypervisor API on systems that
don't have that API.
A couple of minor build fixes.
Thanks to: Alexey Kardashevskiy, Alistair Popple, Desnes A. Nunes do
Rosario, Emmanuel Nicolet, Jordan Niethe, Laurent Dufour, Stephen
Rothwell"
* tag 'powerpc-5.4-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
spufs: fix a crash in spufs_create_root()
powerpc/kvm: Fix kvmppc_vcore->in_guest value in kvmhv_switch_to_host
selftests/powerpc: Fix compile error on tlbie_test due to newer gcc
powerpc/pseries: Remove confusing warning message.
powerpc/64s/radix: Fix build failure with RADIX_MMU=n
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Merge tag 'for-linus-5.4-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen fixes from Juergen Gross:
- correct panic handling when running as a Xen guest
- cleanup the Xen grant driver to remove printing a pointer being
always NULL
- remove a soon to be wrong call of of_dma_configure()
* tag 'for-linus-5.4-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen: Stop abusing DT of_dma_configure API
xen/grant-table: remove unnecessary printing
x86/xen: Return from panic notifier
