Hans de Goede [Fri, 9 Apr 2021 13:40:31 +0000 (15:40 +0200)]
usb: typec: Add typec_port_register_altmodes()
This can be used by Type-C controller drivers which use a standard
usb-connector fwnode, with altmodes sub-node, to describe the available
altmodes.
Note there are is no devicetree bindings documentation for the altmodes
node, this is deliberate. ATM the fwnodes used to register the altmodes
are only used internally to pass platform info from a drivers/platform/x86
driver to the type-c subsystem.
When a devicetree user of this functionally comes up and the dt-bindings
have been hashed out the internal use can be adjusted to match the
dt-bindings.
Currently the typec_port_register_altmodes() function expects
an "altmodes" child fwnode on port->dev with this "altmodes" fwnode having
child fwnodes itself with each child containing 2 integer properties:
1. A "svid" property, which sets the id of the altmode, e.g. displayport
altmode has a svid of 0xff01.
2. A "vdo" property, typically used as a bitmask describing the
capabilities of the altmode, the bits in the vdo are specified in the
specification of the altmode.
Hans de Goede [Fri, 9 Apr 2021 12:41:36 +0000 (14:41 +0200)]
usb: roles: Call try_module_get() from usb_role_switch_find_by_fwnode()
usb_role_switch_find_by_fwnode() returns a reference to the role-switch
which must be put by calling usb_role_switch_put().
usb_role_switch_put() calls module_put(sw->dev.parent->driver->owner),
add a matching try_module_get() to usb_role_switch_find_by_fwnode(),
making it behave the same as the other usb_role_switch functions
which return a reference.
This avoids a WARN_ON being hit at kernel/module.c:1158 due to the
module-refcount going below 0.
Fixes: c6919d5e0cd1 ("usb: roles: Add usb_role_switch_find_by_fwnode()") Cc: stable <stable@vger.kernel.org> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Link: https://lore.kernel.org/r/20210409124136.65591-1-hdegoede@redhat.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
usb: dwc3: xilinx: Remove the extra freeing of clocks
The clocks are configured by devm_clk_bulk_get_all() in this driver. In
case of any error the clocks freeing will be handled automatically.
There is no need to explicitly free the clocks. Fix the same.
docs: usbip: Fix major fields and descriptions in protocol
The old document for usbip protocol is misleading and hard to read:
* Some fields in header are incorrect
* Explanation of some fields are unclear or even wrong
* Padding of header (namely all headers have the same length) is
not explicitly pointed out, which is crucial for stream protocol
like TCP
Major changes:
* Document the correct field as described in the codebase.
* Document the padding in usbip headers. This is crucial for TCP
stream hence these padding should be explicitly point out.
In code these padding are implemented by a union of all headers.
* Fix two FIXME related to usbip unlink and Document the behavior
of unlink in different situation.
* Clarify some field with more accurate explanation, like those
fields associated with URB. Some constraints are extracted from
code.
* Delete specific transfer_flag doc in usbip as it should be
documented by the URB doc in Documentation/driver-api/usb/URB.rst
* Add data captured from wire as example
Version change:
From "PRELIMINARY DRAFT, MAY CONTAIN MISTAKES, 28 Jun 2011"
To "Version 1, 31 Mar 2021"
Bixuan Cui [Thu, 8 Apr 2021 13:08:31 +0000 (21:08 +0800)]
usb: core: hub: Fix PM reference leak in usb_port_resume()
pm_runtime_get_sync will increment pm usage counter even it failed.
thus a pairing decrement is needed.
Fix it by replacing it with pm_runtime_resume_and_get to keep usage
counter balanced.
Bixuan Cui [Thu, 8 Apr 2021 09:18:36 +0000 (17:18 +0800)]
usb: musb: fix PM reference leak in musb_irq_work()
pm_runtime_get_sync will increment pm usage counter even it failed.
thus a pairing decrement is needed.
Fix it by replacing it with pm_runtime_resume_and_get to keep usage
counter balanced.
Yang Yingliang [Wed, 7 Apr 2021 09:29:47 +0000 (17:29 +0800)]
usb: gadget: tegra-xudc: Fix possible use-after-free in tegra_xudc_remove()
This driver's remove path calls cancel_delayed_work(). However, that
function does not wait until the work function finishes. This means
that the callback function may still be running after the driver's
remove function has finished, which would result in a use-after-free.
Fix by calling cancel_delayed_work_sync(), which ensures that
the work is properly cancelled, no longer running, and unable
to re-schedule itself.
Heikki Krogerus [Wed, 7 Apr 2021 06:55:55 +0000 (09:55 +0300)]
usb: typec: Link all ports during connector registration
The connectors may be registered after the ports, so the
"connector" links need to be created for the ports also when
ever a new connector gets registered.
Heikki Krogerus [Wed, 7 Apr 2021 06:55:54 +0000 (09:55 +0300)]
usb: Iterator for ports
Introducing usb_for_each_port(). It works the same way as
usb_for_each_dev(), but instead of going through every USB
device in the system, it walks through the USB ports in the
system.
Heikki Krogerus [Wed, 7 Apr 2021 06:55:52 +0000 (09:55 +0300)]
usb: typec: Port mapping utility
Adding functions that can be used to link/unlink ports -
USB ports, TBT3/USB4 ports, DisplayPorts and so on - to
the USB Type-C connectors they are attached to inside a
system. The symlink that is created for the port device is
named "connector".
Initially only ACPI is supported. ACPI port object shares
the _PLD (Physical Location of Device) with the USB Type-C
connector that it's attached to.
usb: typec: tcpm: update power supply once partner accepts
power_supply_changed needs to be called to notify clients
after the partner accepts the requested values for the pps
case.
Also, remove the redundant power_supply_changed at the end
of the tcpm_reset_port as power_supply_changed is already
called right after usb_type is changed.
usb: typec: tcpm: Address incorrect values of tcpm psy for pps supply
tcpm_pd_select_pps_apdo overwrites port->pps_data.min_volt,
port->pps_data.max_volt, port->pps_data.max_curr even before
port partner accepts the requests. This leaves incorrect values
in current_limit and supply_voltage that get exported by
"tcpm-source-psy-". Solving this problem by caching the request
values in req_min_volt, req_max_volt, req_max_curr, req_out_volt,
req_op_curr. min_volt, max_volt, max_curr gets updated once the
partner accepts the request. current_limit, supply_voltage gets updated
once local port's tcpm enters SNK_TRANSITION_SINK when the accepted
current_limit and supply_voltage is enforced.
usb: typec: tcpm: Address incorrect values of tcpm psy for fixed supply
tcpm_pd_build_request overwrites current_limit and supply_voltage
even before port partner accepts the requests. This leaves stale
values in current_limit and supply_voltage that get exported by
"tcpm-source-psy-". Solving this problem by caching the request
values of current limit/supply voltage in req_current_limit
and req_supply_voltage. current_limit/supply_voltage gets updated
once the port partner accepts the request.
Artur Petrosyan [Thu, 8 Apr 2021 09:46:06 +0000 (13:46 +0400)]
usb: dwc2: Fix partial power down exiting by system resume
Fixes the implementation of exiting from partial power down
power saving mode when PC is resumed.
Added port connection status checking which prevents exiting from
Partial Power Down mode from _dwc2_hcd_resume() if not in Partial
Power Down mode.
Rearranged the implementation to get rid of many "if"
statements.
NOTE: Switch case statement is used for hibernation partial
power down and clock gating mode determination. In this patch
only Partial Power Down is implemented the Hibernation and
clock gating implementations are planned to be added.
Fixes: 6f6d70597c15 ("usb: dwc2: bus suspend/resume for hosts with DWC2_POWER_DOWN_PARAM_NONE") Cc: <stable@vger.kernel.org> Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com> Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com> Link: https://lore.kernel.org/r/20210408094607.1A9BAA0094@mailhost.synopsys.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Artur Petrosyan [Thu, 8 Apr 2021 09:45:58 +0000 (13:45 +0400)]
usb: dwc2: Update partial power down entering by system suspend
With current implementation the port power is being disabled,
which is not required by the programming guide. Also, if there
is a system which works only in "DWC2_POWER_DOWN_PARAM_NONE"
(clock gating) mode the current implementation does not set
Gate hclk bit in pcgctl register.
Rearranges and updates the implementation of entering to partial
power down power saving mode when PC is suspended to get
rid of many "if" statements and removes disabling of port power.
NOTE: Switch case statement is used for hibernation partial
power down and clock gating mode determination. In this patch
only Partial Power Down is implemented the Hibernation and
clock gating implementations are planned to be added.
Artur Petrosyan [Thu, 8 Apr 2021 09:45:33 +0000 (13:45 +0400)]
usb: dwc2: Add part. power down exit from dwc2_conn_id_status_change().
Before changing to connector B exiting from Partial
Power Down is required.
- Added exiting from Partial Power Down mode when
connector ID status changes to "connId B".
Because if connector ID status changed to B connector
while core was in partial power down mode, HANG would
accrue from a soft reset.
Artur Petrosyan [Thu, 8 Apr 2021 09:45:17 +0000 (13:45 +0400)]
usb: dwc2: Add exit partial power down when port is resumed
Added flow of exiting Partial Power Down in
"dwc2_port_resume()" function when core receives resume.
NOTE: Switch case statement is used for hibernation partial
power down and clock gating mode determination. In this patch
only Partial Power Down is implemented the Hibernation and
clock gating implementations are planned to be added.
Artur Petrosyan [Thu, 8 Apr 2021 09:45:09 +0000 (13:45 +0400)]
usb: dwc2: Add enter partial power down when port is suspended
Adds flow of entering Partial Power Down in
"dwc2_port_suspend()" function when core receives suspend.
NOTE: Switch case statement is used for hibernation partial
power down and clock gating mode determination. In this patch
only Partial Power Down is implemented the Hibernation and
clock gating implementations are planned to be added.
Artur Petrosyan [Thu, 8 Apr 2021 09:44:45 +0000 (13:44 +0400)]
usb: dwc2: Update enter and exit partial power down functions
These are wrapper functions which are calling device or host
enter/exit partial power down functions.
This change is done because we need to separate device and
host partial power down functions as the programming flow
has a lot of difference between host and device. With this
update during partial power down exit driver relies on
backup value of "GOTGCTL_CURMODE_HOST" to determine the
mode of core before entering to PPD.
Artur Petrosyan [Thu, 8 Apr 2021 09:44:37 +0000 (13:44 +0400)]
usb: dwc2: Add host partial power down functions
For host mode Partial Power Down entering and exiting
separate functions are needed to implement the logic.
Earlier the logic was implemented in one function. Which was
confusing the readability. Also both host and device implementations
were in the same function.
- Added host partial power down functions which must be called
by dwc2_enter_partial_power_down()/dwc2_exit_partial_power_down()
functions.
Added function names:
dwc2_host_enter_partial_power_down()
dwc2_host_exit_partial_power_down()
NOTE: There is a checkpatch "CHECK" warning on "udelay(100)".
The delay is needed to properly exit gadget Partial Power Down
A delay less than 100 doesn't work.
Artur Petrosyan [Thu, 8 Apr 2021 09:44:29 +0000 (13:44 +0400)]
usb: dwc2: Add device partial power down functions
For device mode Partial Power Down entering and exiting
separate functions are needed to implement the logic.
Earlier the logic was implemented in one function. Which was
confusing the readability. Also both host and device implementations
were in the same function.
- Added device partial power down functions which must be called
by dwc2_enter_partial_power_down()/dwc2_exit_partial_power_down()
functions.
- Added "in_ppd" flag in "dwc2_hsotg" struct to indicate the
core state after entering into partial power down mode.
Added function names:
dwc2_gadget_enter_partial_power_down()
dwc2_gadget_exit_partial_power_down()
NOTE: There is a checkpatch "CHECK" warning on "udelay(100)".
The delay is needed to properly exit gadget Partial Power Down
A delay less than 100 doesn't work.
xhci: prevent double-fetch of transfer and transfer event TRBs
The same values are parsed several times from transfer and event
TRBs by different functions in the same call path, all while processing
one transfer event.
As the TRBs are in DMA memory and can be accessed by the xHC host we want
to avoid this to prevent double-fetch issues.
To resolve this pass the already parsed values to the different functions
in the path of parsing a transfer event
xhci: fix potential array out of bounds with several interrupters
The Max Interrupters supported by the controller is given in a 10bit
wide bitfield, but the driver uses a fixed 128 size array to index these
interrupters.
Klockwork reports a possible array out of bounds case which in theory
is possible. In practice this hasn't been hit as a common number of Max
Interrupters for new controllers is 8, not even close to 128.
Zheyu Ma [Sat, 3 Apr 2021 06:58:36 +0000 (06:58 +0000)]
firewire: nosy: Fix a use-after-free bug in nosy_ioctl()
For each device, the nosy driver allocates a pcilynx structure.
A use-after-free might happen in the following scenario:
1. Open nosy device for the first time and call ioctl with command
NOSY_IOC_START, then a new client A will be malloced and added to
doubly linked list.
2. Open nosy device for the second time and call ioctl with command
NOSY_IOC_START, then a new client B will be malloced and added to
doubly linked list.
3. Call ioctl with command NOSY_IOC_START for client A, then client A
will be readded to the doubly linked list. Now the doubly linked
list is messed up.
4. Close the first nosy device and nosy_release will be called. In
nosy_release, client A will be unlinked and freed.
5. Close the second nosy device, and client A will be referenced,
resulting in UAF.
The root cause of this bug is that the element in the doubly linked list
is reentered into the list.
Fix this bug by adding a check before inserting a client. If a client
is already in the linked list, don't insert it.
The following KASAN report reveals it:
BUG: KASAN: use-after-free in nosy_release+0x1ea/0x210
Write of size 8 at addr ffff888102ad7360 by task poc
CPU: 3 PID: 337 Comm: poc Not tainted 5.12.0-rc5+ #6
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Call Trace:
nosy_release+0x1ea/0x210
__fput+0x1e2/0x840
task_work_run+0xe8/0x180
exit_to_user_mode_prepare+0x114/0x120
syscall_exit_to_user_mode+0x1d/0x40
entry_SYSCALL_64_after_hwframe+0x44/0xae
The buggy address belongs to the object at ffff888102ad7300 which belongs to the cache kmalloc-128 of size 128
The buggy address is located 96 bytes inside of 128-byte region [ffff888102ad7300, ffff888102ad7380)
[ Modified to use 'list_empty()' inside proper lock - Linus ]
Merge tag 'io_uring-5.12-2021-04-03' of git://git.kernel.dk/linux-block
POull io_uring fix from Jens Axboe:
"Just fixing a silly braino in a previous patch, where we'd end up
failing to compile if CONFIG_BLOCK isn't enabled.
Not that a lot of people do that, but kernel bot spotted it and it's
probably prudent to just flush this out now before -rc6.
Sorry about that, none of my test compile configs have !CONFIG_BLOCK"
* tag 'io_uring-5.12-2021-04-03' of git://git.kernel.dk/linux-block:
io_uring: fix !CONFIG_BLOCK compilation failure
Merge tag 'gfs2-v5.12-rc2-fixes2' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2
Pull gfs2 fixes from Andreas Gruenbacher:
"Two more gfs2 fixes"
* tag 'gfs2-v5.12-rc2-fixes2' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
gfs2: report "already frozen/thawed" errors
gfs2: Flag a withdraw if init_threads() fails
Merge tag 'riscv-for-linus-5.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Palmer Dabbelt:
"A handful of fixes for 5.12:
- fix a stack tracing regression related to "const register asm"
variables, which have unexpected behavior.
- ensure the value to be written by put_user() is evaluated before
enabling access to userspace memory..
- align the exception vector table correctly, so we don't rely on the
firmware's handling of unaligned accesses.
- build fix to make NUMA depend on MMU, which triggered on some
randconfigs"
* tag 'riscv-for-linus-5.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
riscv: Make NUMA depend on MMU
riscv: remove unneeded semicolon
riscv,entry: fix misaligned base for excp_vect_table
riscv: evaluate put_user() arg before enabling user access
riscv: Drop const annotation for sp
Merge tag 'powerpc-5.12-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"Fix a bug on pseries where spurious wakeups from H_PROD would prevent
partition migration from succeeding.
Fix oopses seen in pcpu_alloc(), caused by parallel faults of the
percpu mapping causing us to corrupt the protection key used for the
mapping, and cause a fatal key fault.
Thanks to Aneesh Kumar K.V, Murilo Opsfelder Araujo, and Nathan Lynch"
* tag 'powerpc-5.12-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/mm/book3s64: Use the correct storage key value when calling H_PROTECT
powerpc/pseries/mobility: handle premature return from H_JOIN
powerpc/pseries/mobility: use struct for shared state
Merge tag 'driver-core-5.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core fix from Greg KH:
"Here is a single driver core fix for a reported problem with differed
probing. It has been in linux-next for a while with no reported
problems"
* tag 'driver-core-5.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
driver core: clear deferred probe reason on probe retry
Merge tag 'char-misc-5.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg KH:
"Here are a few small driver char/misc changes for 5.12-rc6.
Nothing major here, a few fixes for reported issues:
- interconnect fixes for problems found
- fbcon syzbot-found fix
- extcon fixes
- firmware stratix10 bugfix
- MAINTAINERS file update.
All of these have been in linux-next for a while with no reported
issues"
* tag 'char-misc-5.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
drivers: video: fbcon: fix NULL dereference in fbcon_cursor()
mei: allow map and unmap of client dma buffer only for disconnected client
MAINTAINERS: Add linux-phy list and patchwork
interconnect: Fix kerneldoc warning
firmware: stratix10-svc: reset COMMAND_RECONFIG_FLAG_PARTIAL to 0
extcon: Fix error handling in extcon_dev_register
extcon: Add stubs for extcon_register_notifier_all() functions
interconnect: core: fix error return code of icc_link_destroy()
interconnect: qcom: msm8939: remove rpm-ids from non-RPM nodes
Merge tag 'staging-5.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging driver fixes from Greg KH:
"Here are two rtl8192e staging driver fixes for reported problems.
Both of these have been in linux-next for a while with no reported
issues"
* tag 'staging-5.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
staging: rtl8192e: Change state information from u16 to u8
staging: rtl8192e: Fix incorrect source in memcpy()
Merge tag 'tty-5.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull serial driver fix from Greg KH:
"Here is a single serial driver fix for 5.12-rc6. Is is a revert of a
change that showed up in 5.9 that has been reported to cause problems.
It has been in linux-next for a while with no reported issues"
* tag 'tty-5.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
soc: qcom-geni-se: Cleanup the code to remove proxy votes
kernel test robot correctly pinpoints a compilation failure if
CONFIG_BLOCK isn't set:
fs/io_uring.c: In function '__io_complete_rw':
>> fs/io_uring.c:2509:48: error: implicit declaration of function 'io_rw_should_reissue'; did you mean 'io_rw_reissue'? [-Werror=implicit-function-declaration]
2509 | if ((res == -EAGAIN || res == -EOPNOTSUPP) && io_rw_should_reissue(req)) {
| ^~~~~~~~~~~~~~~~~~~~
| io_rw_reissue
cc1: some warnings being treated as errors
Ensure that we have a stub declaration of io_rw_should_reissue() for
!CONFIG_BLOCK.
Fixes: 230d50d448ac ("io_uring: move reissue into regular IO path") Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Merge tag 'block-5.12-2021-04-02' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
- Remove comment that never came to fruition in 22 years of development
(Christoph)
- Remove unused request flag (Christoph)
- Fix for null_blk fake timeout handling (Damien)
- Fix for IOCB_NOWAIT being ignored for O_DIRECT on raw bdevs (Pavel)
- Error propagation fix for multiple split bios (Yufen)
* tag 'block-5.12-2021-04-02' of git://git.kernel.dk/linux-block:
block: remove the unused RQF_ALLOCED flag
block: update a few comments in uapi/linux/blkpg.h
block: don't ignore REQ_NOWAIT for direct IO
null_blk: fix command timeout completion handling
block: only update parent bi_status when bio fail
Merge tag 'io_uring-5.12-2021-04-02' of git://git.kernel.dk/linux-block
Pull io_uring fixes from Jens Axboe:
"Nothing really major in here, and finally nothing really related to
signals. A few minor fixups related to the threading changes, and some
general fixes, that's it.
There's the pending gdb-get-confused-about-arch, but that's more of a
cosmetic issue, nothing that hinder use of it. And given that other
archs will likely be affected by that oddity too, better to postpone
any changes there until 5.13 imho"
* tag 'io_uring-5.12-2021-04-02' of git://git.kernel.dk/linux-block:
io_uring: move reissue into regular IO path
io_uring: fix EIOCBQUEUED iter revert
io_uring/io-wq: protect against sprintf overflow
io_uring: don't mark S_ISBLK async work as unbounded
io_uring: drop sqd lock before handling signals for SQPOLL
io_uring: handle setup-failed ctx in kill_timeouts
io_uring: always go for cancellation spin on exec
Merge tag 'acpi-5.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI fixes from Rafael Wysocki:
"These fix an ACPI tables management issue, an issue related to the
ACPI enumeration of devices and CPU wakeup in the ACPI processor
driver.
Specifics:
- Ensure that the memory occupied by ACPI tables on x86 will always
be reserved to prevent it from being allocated for other purposes
which was possible in some cases (Rafael Wysocki).
- Fix the ACPI device enumeration code to prevent it from attempting
to evaluate the _STA control method for devices with unmet
dependencies which is likely to fail (Hans de Goede).
- Fix the handling of CPU0 wakeup in the ACPI processor driver to
prevent CPU0 online failures from occurring (Vitaly Kuznetsov)"
* tag 'acpi-5.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI: processor: Fix CPU0 wakeup in acpi_idle_play_dead()
ACPI: scan: Fix _STA getting called on devices with unmet dependencies
ACPI: tables: x86: Reserve memory occupied by ACPI tables
Merge tag 'pm-5.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"These fix a race condition and an ordering issue related to using
device links in the runtime PM framework and two kerneldoc comments in
cpufreq.
Specifics:
- Fix race condition related to the handling of supplier devices
during consumer device probe and fix the order of decrementation of
two related reference counters in the runtime PM core code handling
supplier devices (Adrian Hunter).
- Fix kerneldoc comments in cpufreq that have not been updated along
with the functions documented by them (Geert Uytterhoeven)"
* tag 'pm-5.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
PM: runtime: Fix race getting/putting suppliers at probe
PM: runtime: Fix ordering in pm_runtime_get_suppliers()
cpufreq: Fix scaling_{available,boost}_frequencies_show() comments
block: update a few comments in uapi/linux/blkpg.h
The big top of the file comment talk about grand plans that never
happened, so remove them to not confuse the readers. Also mark the
devname and volname fields as ignored as they were never used by the
kernel.
Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Merge tag 'trace-v5.12-rc5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fix from Steven Rostedt:
"Fix stack trace entry size to stop showing garbage
The macro that creates both the structure and the format displayed to
user space for the stack trace event was changed a while ago to fix
the parsing by user space tooling. But this change also modified the
structure used to store the stack trace event. It changed the caller
array field from [0] to [8].
Even though the size in the ring buffer is dynamic and can be
something other than 8 (user space knows how to handle this), the 8
extra words was not accounted for when reserving the event on the ring
buffer, and added 8 more entries, due to the calculation of
"sizeof(*entry) + nr_entries * sizeof(long)", as the sizeof(*entry)
now contains 8 entries.
The size of the caller field needs to be subtracted from the size of
the entry to create the correct allocation size"
* tag 'trace-v5.12-rc5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing: Fix stack trace event size
It's non-obvious how retry is done for block backed files, when it happens
off the kiocb done path. It also makes it tricky to deal with the iov_iter
handling.
Just mark the req as needing a reissue, and handling it from the
submission path instead. This makes it directly obvious that we're not
re-importing the iovec from userspace past the submit point, and it means
that we can just reuse our usual -EAGAIN retry path from the read/write
handling.
At some point in the future, we'll gain the ability to always reliably
return -EAGAIN through the stack. A previous attempt on the block side
didn't pan out and got reverted, hence the need to check for this
information out-of-band right now.
Pavel Begunkov [Fri, 20 Nov 2020 17:10:28 +0000 (17:10 +0000)]
block: don't ignore REQ_NOWAIT for direct IO
If IOCB_NOWAIT is set on submission, then that needs to get propagated to
REQ_NOWAIT on the block side. Otherwise we completely lose this
information, and any issuer of IOCB_NOWAIT IO will potentially end up
blocking on eg request allocation on the storage side.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Chunfeng Yun [Wed, 31 Mar 2021 09:05:52 +0000 (17:05 +0800)]
usb: xhci-mtk: fix broken streams issue on 0.96 xHCI
The MediaTek 0.96 xHCI controller on some platforms does not
support bulk stream even HCCPARAMS says supporting, due to MaxPSASize
is set a default value 1 by mistake, here use XHCI_BROKEN_STREAMS
quirk to fix it.
Chunfeng Yun [Wed, 31 Mar 2021 08:25:42 +0000 (16:25 +0800)]
usb: xhci-mtk: fix oops when unbind driver
The oops happens when unbind driver through sysfs as following,
because xhci_mtk_drop_ep() try to drop the endpoint of root hub
which is not added by xhci_add_endpoint() and the virtual device
is not allocated, in fact also needn't drop it, so should skip it.
Tao Ren [Wed, 31 Mar 2021 04:58:31 +0000 (21:58 -0700)]
usb: gadget: aspeed: fix dma map failure
Currently the virtual port_dev device is passed to DMA API, and this is
wrong because the device passed to DMA API calls must be the actual
hardware device performing the DMA.
The patch replaces usb_gadget_map_request/usb_gadget_unmap_request APIs
with usb_gadget_map_request_by_dev/usb_gadget_unmap_request_by_dev APIs
so the DMA capable platform device can be passed to the DMA APIs.
The patch fixes below backtrace detected on Facebook AST2500 OpenBMC
platforms:
Ray Chi [Sat, 27 Mar 2021 18:17:42 +0000 (02:17 +0800)]
usb: dwc3: add cancelled reasons for dwc3 requests
Currently, when dwc3 handles request cancelled, dwc3 just returns
-ECONNRESET for all requests. It will cause USB function drivers
can't know if the requests are cancelled by other reasons.
This patch will replace DWC3_REQUEST_STATUS_CANCELLED with the
reasons below.
- DWC3_REQUEST_STATUS_DISCONNECTED
- DWC3_REQUEST_STATUS_DEQUEUED
- DWC3_REQUEST_STATUS_STALLED
Zhen Lei [Mon, 29 Mar 2021 07:27:13 +0000 (15:27 +0800)]
dt-bindings: usb: dwc3-imx8mp: Use the correct name for child node "snps, dwc3"
File snps,dwc3.yaml describes the schema of Synopsys DesignWare USB3
Controller, it directly or indirectly contains "$ref: usb.yaml". So the
node name of "snps,dwc3" must start with "usb". Otherwise, the following
warning will be displayed:
Documentation/devicetree/bindings/usb/fsl,imx8mp-dwc3.example.dt.yaml: \
dwc3@38100000: $nodename:0: 'dwc3@38100000' does not match '^usb(@.*)?'
From schema: Documentation/devicetree/bindings/usb/snps,dwc3.yaml
In addition, replace "type: object" with "$ref: snps,dwc3.yaml#". Ensure
that all properties of the child node comply with snps,dwc3.yaml.
The opening comment mark '/**' is used for highlighting the beginning of
kernel-doc comments.
The header for drivers/usb/dwc3/dwc3-exynos.c follows this syntax, but the
content inside does not comply with kernel-doc.
This line was probably not meant for kernel-doc parsing, but is parsed
due to the presence of kernel-doc like comment syntax(i.e, '/**'), which
causes unexpected warning from kernel-doc:
"warning: expecting prototype for dwc3(). Prototype was for DWC3_EXYNOS_MAX_CLOCKS() instead"
Provide a simple fix by replacing this occurrence with general comment
format, i.e. '/*', to prevent kernel-doc from parsing it.
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Aditya Srivastava <yashsri421@gmail.com> Link: https://lore.kernel.org/r/20210329140318.27742-1-yashsri421@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
usb: dwc3: fix incorrect kernel-doc comment syntax in files
The opening comment mark '/**' is used for highlighting the beginning of
kernel-doc comments.
There are certain files in drivers/usb/dwc3, which follow this syntax,
but the content inside does not comply with kernel-doc.
Such lines were probably not meant for kernel-doc parsing, but are parsed
due to the presence of kernel-doc like comment syntax(i.e, '/**'), which
causes unexpected warnings from kernel-doc.
E.g., presence of kernel-doc like comment in drivers/usb/dwc3/io.h at
header causes this warnings by kernel-doc:
"warning: expecting prototype for h(). Prototype was for __DRIVERS_USB_DWC3_IO_H() instead"
Similarly for other files too.
Provide a simple fix by replacing such occurrences with general comment
format, i.e. '/*', to prevent kernel-doc from parsing it.
usb: dwc3: st: fix incorrect kernel-doc comment syntax in file
The opening comment mark '/**' is used for highlighting the beginning of
kernel-doc comments.
The header for drivers/usb/dwc3/dwc3-st.c follows this syntax, but the
content inside does not comply with kernel-doc.
This line was probably not meant for kernel-doc parsing, but is parsed
due to the presence of kernel-doc like comment syntax(i.e, '/**'), which
causes unexpected warning from kernel-doc:
"warning: expecting prototype for dwc3(). Prototype was for CLKRST_CTRL() instead"
Provide a simple fix by replacing this occurrence with general comment
format, i.e. '/*', to prevent kernel-doc from parsing it.
The opening comment mark '/**' is used for highlighting the beginning of
kernel-doc comments.
The header for drivers/usb/dwc3/dwc3-imx8mp.c follows this syntax, but the
content inside does not comply with kernel-doc.
This line was probably not meant for kernel-doc parsing, but is parsed
due to the presence of kernel-doc like comment syntax(i.e, '/**'), which
causes unexpected warning from kernel-doc:
"warning: expecting prototype for dwc3(). Prototype was for USB_WAKEUP_CTRL() instead"
Provide a simple fix by replacing this occurrence with general comment
format, i.e. '/*', to prevent kernel-doc from parsing it.
Zihao Yu [Wed, 17 Mar 2021 08:17:25 +0000 (16:17 +0800)]
riscv,entry: fix misaligned base for excp_vect_table
In RV64, the size of each entry in excp_vect_table is 8 bytes. If the
base of the table is not 8-byte aligned, loading an entry in the table
will raise a misaligned exception. Although such exception will be
handled by opensbi/bbl, this still causes performance degradation.
Ben Dooks [Mon, 29 Mar 2021 09:57:49 +0000 (10:57 +0100)]
riscv: evaluate put_user() arg before enabling user access
The <asm/uaccess.h> header has a problem with put_user(a, ptr) if
the 'a' is not a simple variable, such as a function. This can lead
to the compiler producing code as so:
1: enable_user_access()
2: evaluate 'a' into register 'r'
3: put 'r' to 'ptr'
4: disable_user_acess()
The issue is that 'a' is now being evaluated with the user memory
protections disabled. So we try and force the evaulation by assigning
'x' to __val at the start, and hoping the compiler barriers in
enable_user_access() do the job of ordering step 2 before step 1.
This has shown up in a bug where 'a' sleeps and thus schedules out
and loses the SR_SUM flag. This isn't sufficient to fully fix, but
should reduce the window of opportunity. The first instance of this
we found is in scheudle_tail() where the code does:
$ less -N kernel/sched/core.c
4263 if (current->set_child_tid)
4264 put_user(task_pid_vnr(current), current->set_child_tid);
Here, the task_pid_vnr(current) is called within the block that has
enabled the user memory access. This can be made worse with KASAN
which makes task_pid_vnr() a rather large call with plenty of
opportunity to sleep.
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> Reported-by: syzbot+e74b94fe601ab9552d69@syzkaller.appspotmail.com Suggested-by: Arnd Bergman <arnd@arndb.de>
--
Changes since v1:
- fixed formatting and updated the patch description with more info
Changes since v2:
- fixed commenting on __put_user() (schwab@linux-m68k.org)
Change since v3:
- fixed RFC in patch title. Should be ready to merge.
Merge tag 'lto-v5.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull LTO fix from Kees Cook:
"It seems that there is a bug in ld.bfd when doing module section
merging.
As explicit merging is only needed for LTO, the work-around is to only
do it under LTO, leaving the original section layout choices alone
under normal builds:
- Only perform explicit module section merges under LTO (Sean
Christopherson)"
* tag 'lto-v5.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
kbuild: lto: Merge module sections if and only if CONFIG_LTO_CLANG is enabled
kbuild: lto: Merge module sections if and only if CONFIG_LTO_CLANG is enabled
Merge module sections only when using Clang LTO. With ld.bfd, merging
sections does not appear to update the symbol tables for the module,
e.g. 'readelf -s' shows the value that a symbol would have had, if
sections were not merged. ld.lld does not show this problem.
The stale symbol table breaks gdb's function disassembler, and presumably
other things, e.g.
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm fixes from Paolo Bonzini:
"It's a bit larger than I (and probably you) would like by the time we
get to -rc6, but perhaps not entirely unexpected since the changes in
the last merge window were larger than usual.
x86:
- Fixes for missing TLB flushes with TDP MMU
- Fixes for race conditions in nested SVM
- Fixes for lockdep splat with Xen emulation
- Fix for kvmclock underflow
- Fix srcdir != builddir builds
- Other small cleanups
ARM:
- Fix GICv3 MMIO compatibility probing
- Prevent guests from using the ARMv8.4 self-hosted tracing
extension"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
selftests: kvm: Check that TSC page value is small after KVM_SET_CLOCK(0)
KVM: x86: Prevent 'hv_clock->system_time' from going negative in kvm_guest_time_update()
KVM: x86: disable interrupts while pvclock_gtod_sync_lock is taken
KVM: x86: reduce pvclock_gtod_sync_lock critical sections
KVM: SVM: ensure that EFER.SVME is set when running nested guest or on nested vmexit
KVM: SVM: load control fields from VMCB12 before checking them
KVM: x86/mmu: Don't allow TDP MMU to yield when recovering NX pages
KVM: x86/mmu: Ensure TLBs are flushed for TDP MMU during NX zapping
KVM: x86/mmu: Ensure TLBs are flushed when yielding during GFN range zap
KVM: make: Fix out-of-source module builds
selftests: kvm: make hardware_disable_test less verbose
KVM: x86/vPMU: Forbid writing to MSR_F15H_PERF MSRs when guest doesn't have X86_FEATURE_PERFCTR_CORE
KVM: x86: remove unused declaration of kvm_write_tsc()
KVM: clean up the unused argument
tools/kvm_stat: Add restart delay
KVM: arm64: Fix CPU interface MMIO compatibility detection
KVM: arm64: Disable guest access to trace filter controls
KVM: arm64: Hide system instruction access to Trace registers
Merge tag 'drm-fixes-2021-04-02' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie:
"Things have settled down in time for Easter, a random smattering of
small fixes across a few drivers.
I'm guessing though there might be some i915 and misc fixes out there
I haven't gotten yet, but since today is a public holiday here, I'm
sending this early so I can have the day off, I'll see if more
requests come in and decide what to do with them later.
amdgpu:
- Polaris idle power fix
- VM fix
- Vangogh S3 fix
- Fixes for non-4K page sizes
* tag 'drm-fixes-2021-04-02' of git://anongit.freedesktop.org/drm/drm:
drm/amdgpu: check alignment on CPU page for bo map
drm/amdgpu: Set a suitable dev_info.gart_page_size
drm/amdgpu/vangogh: don't check for dpm in is_dpm_running when in suspend
drm/amdkfd: dqm fence memory corruption
drm/tegra: sor: Grab runtime PM reference across reset
drm/tegra: dc: Restore coupling of display controllers
gpu: host1x: Use different lock classes for each client
drm/tegra: dc: Don't set PLL clock to 0Hz
drm/amdgpu: fix offset calculation in amdgpu_vm_bo_clear_mappings()
drm/amd/pm: no need to force MCLK to highest when no display connected
drm/exynos/decon5433: Remove the unused include statements
drm/imx: imx-ldb: fix out of bounds array access warning
drm/imx: imx-ldb: Register LDB channel1 when it is the only channel to be used
drm/imx: fix memory leak when fails to init
Dave Airlie [Thu, 1 Apr 2021 18:52:45 +0000 (04:52 +1000)]
Merge tag 'imx-drm-fixes-2021-04-01' of git://git.pengutronix.de/git/pza/linux into drm-fixes
drm/imx: imx-drm-core and imx-ldb fixes
Fix a memory leak in an error path during DRM device initialization,
fix the LDB driver to register channel 1 even if channel 0 is unused,
and fix an out of bounds array access warning in the LDB driver.
Dave Airlie [Thu, 1 Apr 2021 18:44:28 +0000 (04:44 +1000)]
Merge tag 'drm/tegra/for-5.12-rc6' of ssh://git.freedesktop.org/git/tegra/linux into drm-fixes
drm/tegra: Fixes for v5.12-rc6
This contains a couple of fixes for various issues such as lockdep
warnings, runtime PM references, coupled display controllers and
misconfigured PLLs.
Commit cbc3b92ce037 fixed an issue to modify the macros of the stack trace
event so that user space could parse it properly. Originally the stack
trace format to user space showed that the called stack was a dynamic
array. But it is not actually a dynamic array, in the way that other
dynamic event arrays worked, and this broke user space parsing for it. The
update was to make the array look to have 8 entries in it. Helper
functions were added to make it parse it correctly, as the stack was
dynamic, but was determined by the size of the event stored.
Although this fixed user space on how it read the event, it changed the
internal structure used for the stack trace event. It changed the array
size from [0] to [8] (added 8 entries). This increased the size of the
stack trace event by 8 words. The size reserved on the ring buffer was the
size of the stack trace event plus the number of stack entries found in
the stack trace. That commit caused the amount to be 8 more than what was
needed because it did not expect the caller field to have any size. This
produced 8 entries of garbage (and reading random data) from the stack
trace event:
Instead, subtract the size of the caller field from the size of the event
to make sure that only the amount needed to store the stack trace is
reserved.
Merge tag 'tomoyo-pr-20210401' of git://git.osdn.net/gitroot/tomoyo/tomoyo-test1
Pull tomory fix from Tetsuo Handa:
"An update on 'tomoyo: recognize kernel threads correctly' from Jens
Axboe to not special case PF_IO_WORKER for PF_KTHREAD"
* tag 'tomoyo-pr-20210401' of git://git.osdn.net/gitroot/tomoyo/tomoyo-test1:
tomoyo: don't special case PF_IO_WORKER for PF_KTHREAD
Merge tag 'xarray-5.12' of git://git.infradead.org/users/willy/xarray
Pull XArray fixes from Matthew Wilcox:
"My apologies for the lateness of this. I had a bug reported in the
test suite, and when I started working on it, I realised I had two
fixes sitting in the xarray tree since last November. Anyway,
everything here is fixes, apart from adding xa_limit_16b. The test
suite passes.
Summary:
- Fix a bug when splitting to a non-zero order
- Documentation fix
- Add a predefined 16-bit allocation limit
- Various test suite fixes"
* tag 'xarray-5.12' of git://git.infradead.org/users/willy/xarray:
idr test suite: Improve reporting from idr_find_test_1
idr test suite: Create anchor before launching throbber
idr test suite: Take RCU read lock in idr_find_test_1
radix tree test suite: Register the main thread with the RCU library
radix tree test suite: Fix compilation
XArray: Add xa_limit_16b
XArray: Fix splitting to non-zero orders
XArray: Fix split documentation
Pavel Begunkov [Thu, 1 Apr 2021 11:18:48 +0000 (12:18 +0100)]
io_uring: fix EIOCBQUEUED iter revert
iov_iter_revert() is done in completion handlers that happensf before
read/write returns -EIOCBQUEUED, no need to repeat reverting afterwards.
Moreover, even though it may appear being just a no-op, it's actually
races with 1) user forging a new iovec of a different size 2) reissue,
that is done via io-wq continues completely asynchronously.
Fixes: 3e6a0d3c7571c ("io_uring: fix -EAGAIN retry with IOPOLL") Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Pavel Begunkov [Thu, 1 Apr 2021 08:55:04 +0000 (09:55 +0100)]
io_uring/io-wq: protect against sprintf overflow
task_pid may be large enough to not fit into the left space of
TASK_COMM_LEN-sized buffers and overflow in sprintf. We not so care
about uniqueness, so replace it with safer snprintf().
projects / mirror_ubuntu-kernels.git / log