If the endpoint completion callback is call right after the ep_enabled flag
is cleared and before usb_ep_dequeue() is call, we could do a double free
on the request and the associated buffer.

Fix this by clearing ep_enabled after all the endpoint requests have been
dequeued.

Fixes: 7de8681b ("usb: gadget: u_audio: Free requests only after callback")
Cc: stable <stable@vger.kernel.org>
Reported-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20210827092927.366482-1-jbrunet@baylibre.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

When the uac2 function is stopped, there seems to be an issue reported on
some platforms (Intel Merrifield at least)

BUG: kernel NULL pointer dereference, address: 0000000000000008
...
RIP: 0010:dwc3_gadget_del_and_unmap_request+0x19/0xe0
...
Call Trace:
 dwc3_remove_requests.constprop.0+0x12f/0x170
 __dwc3_gadget_ep_disable+0x7a/0x160
 dwc3_gadget_ep_disable+0x3d/0xd0
 usb_ep_disable+0x1c/0x70
 u_audio_stop_capture+0x79/0x120 [u_audio]
 afunc_set_alt+0x73/0x80 [usb_f_uac2]
 composite_setup+0x224/0x1b90 [libcomposite]

The issue happens only when the gadget is using the sync type "async", not
"adaptive". This indicates that problem is coming from the feedback
endpoint, which is only used with async synchronization mode.

The problem is that request is freed regardless of usb_ep_dequeue(), which
ends up badly if the request is not actually dequeued yet.

Update the feedback endpoint free function to release the endpoint the same
way it is done for the data endpoint, which takes care of the problem.

Fixes: 24f779da ("usb: gadget: f_uac2/u_audio: add feedback endpoint support")
Reported-by: Ferry Toth <ftoth@exalondelft.nl>
Tested-by: Ferry Toth <ftoth@exalondelft.nl>
Acked-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20210827075853.266912-1-jbrunet@baylibre.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

If the port is going to send Discover_Identity Message, vdm_sm_running
flag was intentionally set before entering Ready States in order to
avoid the conflict because the port and the port partner might start
AMS at almost the same time after entering Ready States.

However, the original design has a problem. When the port is doing
DR_SWAP from Device to Host, it raises the flag. Later in the
tcpm_send_discover_work, the flag blocks the procedure of sending the
Discover_Identity and it might never be cleared until disconnection.

Since there exists another flag send_discover representing that the port
is going to send Discover_Identity or not, it is enough to use that flag
to prevent the conflict. Also change the timing of the set/clear of
vdm_sm_running to indicate whether the VDM SM is actually running or
not.

Fixes: c34e85fa ("usb: typec: tcpm: Send DISCOVER_IDENTITY from dedicated work")
Cc: stable <stable@vger.kernel.org>
Cc: Badhri Jagan Sridharan <badhri@google.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Kyle Tso <kyletso@google.com>
Link: https://lore.kernel.org/r/20210826124201.1562502-1-kyletso@google.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The recent attempt to handle an unknown ROM state in the commit
d143825b ("usb: renesas-xhci: Fix handling of unknown ROM state")
resulted in a regression and reverted later by the commit 44cf5360
("Revert "usb: renesas-xhci: Fix handling of unknown ROM state"").
The problem of the former fix was that it treated the failure of
firmware loading as a fatal error.  Since the firmware files aren't
included in the standard linux-firmware tree, most users don't have
them, hence they got the non-working system after that.  The revert
fixed the regression, but also it didn't make the firmware loading
triggered even on the devices that do need it.  So we need still a fix
for them.

This is another attempt to handle the unknown ROM state.  Like the
previous fix, this also tries to load the firmware when ROM shows
unknown state.  In this patch, however, the failure of a firmware
loading (such as a missing firmware file) isn't handled as a fatal
error any longer when ROM has been already detected, but it falls back
to the ROM mode like before.  The error is returned only when no ROM
is detected and the firmware loading failed.

Along with it, for simplifying the code flow, the detection and the
check of ROM is factored out from renesas_fw_check_running() and done
in the caller side, renesas_xhci_check_request_fw().  It avoids the
redundant ROM checks.

The patch was tested on Lenovo Thinkpad T14 gen (BIOS 1.34).  Also it
was confirmed that no regression is seen on another Thinkpad T14
machine that has worked without the patch, too.

Fixes: 44cf5360 ("Revert "usb: renesas-xhci: Fix handling of unknown ROM state"")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
BugLink: https://bugzilla.opensuse.org/show_bug.cgi?id=1189207
Link: https://lore.kernel.org/r/20210826124127.14789-1-tiwai@suse.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

During a USB cable disconnect, or soft disconnect scenario, a pending
SETUP transaction may not be completed, leading to the following
error:

    dwc3 a600000.dwc3: timed out waiting for SETUP phase

If this occurs, then the entire pullup disable routine is skipped and
proper cleanup and halting of the controller does not complete.

Instead of returning an error (which is ignored from the UDC
perspective), allow the pullup disable routine to continue, which
will also handle disabling of EP0/1.  This will end any active
transfers as well.  Ensure to clear any delayed_status also, as the
timeout could happen within the STATUS stage.

Fixes: bb014736 ("usb: dwc3: gadget: don't clear RUN/STOP when it's invalid to do so")
Cc: <stable@vger.kernel.org>
Reviewed-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Acked-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Wesley Cheng <wcheng@codeaurora.org>
Link: https://lore.kernel.org/r/20210825042855.7977-1-wcheng@codeaurora.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

We can't depend on the TRB's HWO bit to determine if the TRB ring is
"full". A TRB is only available when the driver had processed it, not
when the controller consumed and relinquished the TRB's ownership to the
driver. Otherwise, the driver may overwrite unprocessed TRBs. This can
happen when many transfer events accumulate and the system is slow to
process them and/or when there are too many small requests.

If a request is in the started_list, that means there is one or more
unprocessed TRBs remained. Check this instead of the TRB's HWO bit
whether the TRB ring is full.

Fixes: c4233573 ("usb: dwc3: gadget: prepare TRBs on update transfers too")
Cc: <stable@vger.kernel.org>
Acked-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/e91e975affb0d0d02770686afc3a5b9eb84409f6.1629335416.git.Thinh.Nguyen@synopsys.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Merge tag 'usb-serial-5.14-rc8' of https://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial into usb-linus

Johan writes:

USB-serial fixes for 5.14-rc8

Here's a fix for a regression in 5.14 (also backported to stable) which
caused reads to stall for ch341 devices.

Included is also a new modem device id.

All but the revert have been in linux-next, and with no reported issues.

* tag 'usb-serial-5.14-rc8' of https://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial:
  Revert "USB: serial: ch341: fix character loss at high transfer rates"
  USB: serial: option: add new VID/PID to support Fibocom FG150

This reverts commit 3c18e9ba.

These devices do not appear to send a zero-length packet when the
transfer size is a multiple of the bulk-endpoint max-packet size. This
means that incoming data may not be processed by the driver until a
short packet is received or the receive buffer is full.

Revert back to using endpoint-sized receive buffers to avoid stalled
reads.
Reported-by: Paul Größel <pb.g@gmx.de>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=214131
Fixes: 3c18e9ba ("USB: serial: ch341: fix character loss at high transfer rates")
Cc: stable@vger.kernel.org
Cc: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20210824121926.19311-1-johan@kernel.orgSigned-off-by: Johan Hovold <johan@kernel.org>

Fibocom FG150 is a 5G module based on Qualcomm SDX55 platform,
support Sub-6G band.

Here are the outputs of lsusb -v and usb-devices:

> T:  Bus=02 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#=  2 Spd=5000 MxCh= 0
> D:  Ver= 3.20 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 9 #Cfgs=  1
> P:  Vendor=2cb7 ProdID=010b Rev=04.14
> S:  Manufacturer=Fibocom
> S:  Product=Fibocom Modem_SN:XXXXXXXX
> S:  SerialNumber=XXXXXXXX
> C:  #Ifs= 5 Cfg#= 1 Atr=a0 MxPwr=896mA
> I:  If#=0x0 Alt= 0 #EPs= 1 Cls=ef(misc ) Sub=04 Prot=01 Driver=rndis_host
> I:  If#=0x1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=rndis_host
> I:  If#=0x2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)
> I:  If#=0x3 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=30 Driver=(none)
> I:  If#=0x4 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=42 Prot=01 Driver=(none)

> Bus 002 Device 002: ID 2cb7:010b Fibocom Fibocom Modem_SN:XXXXXXXX
> Device Descriptor:
>   bLength                18
>   bDescriptorType         1
>   bcdUSB               3.20
>   bDeviceClass            0
>   bDeviceSubClass         0
>   bDeviceProtocol         0
>   bMaxPacketSize0         9
>   idVendor           0x2cb7 Fibocom
>   idProduct          0x010b
>   bcdDevice            4.14
>   iManufacturer           1 Fibocom
>   iProduct                2 Fibocom Modem_SN:XXXXXXXX
>   iSerial                 3 XXXXXXXX
>   bNumConfigurations      1
>   Configuration Descriptor:
>     bLength                 9
>     bDescriptorType         2
>     wTotalLength       0x00e6
>     bNumInterfaces          5
>     bConfigurationValue     1
>     iConfiguration          4 RNDIS_DUN_DIAG_ADB
>     bmAttributes         0xa0
>       (Bus Powered)
>       Remote Wakeup
>     MaxPower              896mA
>     Interface Association:
>       bLength                 8
>       bDescriptorType        11
>       bFirstInterface         0
>       bInterfaceCount         2
>       bFunctionClass        239 Miscellaneous Device
>       bFunctionSubClass       4
>       bFunctionProtocol       1
>       iFunction               7 RNDIS
>     Interface Descriptor:
>       bLength                 9
>       bDescriptorType         4
>       bInterfaceNumber        0
>       bAlternateSetting       0
>       bNumEndpoints           1
>       bInterfaceClass       239 Miscellaneous Device
>       bInterfaceSubClass      4
>       bInterfaceProtocol      1
>       iInterface              0
>       ** UNRECOGNIZED:  05 24 00 10 01
>       ** UNRECOGNIZED:  05 24 01 00 01
>       ** UNRECOGNIZED:  04 24 02 00
>       ** UNRECOGNIZED:  05 24 06 00 01
>       Endpoint Descriptor:
>         bLength                 7
>         bDescriptorType         5
>         bEndpointAddress     0x81  EP 1 IN
>         bmAttributes            3
>           Transfer Type            Interrupt
>           Synch Type               None
>           Usage Type               Data
>         wMaxPacketSize     0x0008  1x 8 bytes
>         bInterval               9
>         bMaxBurst               0
>     Interface Descriptor:
>       bLength                 9
>       bDescriptorType         4
>       bInterfaceNumber        1
>       bAlternateSetting       0
>       bNumEndpoints           2
>       bInterfaceClass        10 CDC Data
>       bInterfaceSubClass      0
>       bInterfaceProtocol      0
>       iInterface              0
>       Endpoint Descriptor:
>         bLength                 7
>         bDescriptorType         5
>         bEndpointAddress     0x8e  EP 14 IN
>         bmAttributes            2
>           Transfer Type            Bulk
>           Synch Type               None
>           Usage Type               Data
>         wMaxPacketSize     0x0400  1x 1024 bytes
>         bInterval               0
>         bMaxBurst               6
>       Endpoint Descriptor:
>         bLength                 7
>         bDescriptorType         5
>         bEndpointAddress     0x0f  EP 15 OUT
>         bmAttributes            2
>           Transfer Type            Bulk
>           Synch Type               None
>           Usage Type               Data
>         wMaxPacketSize     0x0400  1x 1024 bytes
>         bInterval               0
>         bMaxBurst               6
>     Interface Descriptor:
>       bLength                 9
>       bDescriptorType         4
>       bInterfaceNumber        2
>       bAlternateSetting       0
>       bNumEndpoints           3
>       bInterfaceClass       255 Vendor Specific Class
>       bInterfaceSubClass      0
>       bInterfaceProtocol      0
>       iInterface              0
>       ** UNRECOGNIZED:  05 24 00 10 01
>       ** UNRECOGNIZED:  05 24 01 00 00
>       ** UNRECOGNIZED:  04 24 02 02
>       ** UNRECOGNIZED:  05 24 06 00 00
>       Endpoint Descriptor:
>         bLength                 7
>         bDescriptorType         5
>         bEndpointAddress     0x83  EP 3 IN
>         bmAttributes            3
>           Transfer Type            Interrupt
>           Synch Type               None
>           Usage Type               Data
>         wMaxPacketSize     0x000a  1x 10 bytes
>         bInterval               9
>         bMaxBurst               0
>       Endpoint Descriptor:
>         bLength                 7
>         bDescriptorType         5
>         bEndpointAddress     0x82  EP 2 IN
>         bmAttributes            2
>           Transfer Type            Bulk
>           Synch Type               None
>           Usage Type               Data
>         wMaxPacketSize     0x0400  1x 1024 bytes
>         bInterval               0
>         bMaxBurst               0
>       Endpoint Descriptor:
>         bLength                 7
>         bDescriptorType         5
>         bEndpointAddress     0x01  EP 1 OUT
>         bmAttributes            2
>           Transfer Type            Bulk
>           Synch Type               None
>           Usage Type               Data
>         wMaxPacketSize     0x0400  1x 1024 bytes
>         bInterval               0
>         bMaxBurst               0
>     Interface Descriptor:
>       bLength                 9
>       bDescriptorType         4
>       bInterfaceNumber        3
>       bAlternateSetting       0
>       bNumEndpoints           2
>       bInterfaceClass       255 Vendor Specific Class
>       bInterfaceSubClass    255 Vendor Specific Subclass
>       bInterfaceProtocol     48
>       iInterface              0
>       Endpoint Descriptor:
>         bLength                 7
>         bDescriptorType         5
>         bEndpointAddress     0x84  EP 4 IN
>         bmAttributes            2
>           Transfer Type            Bulk
>           Synch Type               None
>           Usage Type               Data
>         wMaxPacketSize     0x0400  1x 1024 bytes
>         bInterval               0
>         bMaxBurst               0
>       Endpoint Descriptor:
>         bLength                 7
>         bDescriptorType         5
>         bEndpointAddress     0x02  EP 2 OUT
>         bmAttributes            2
>           Transfer Type            Bulk
>           Synch Type               None
>           Usage Type               Data
>         wMaxPacketSize     0x0400  1x 1024 bytes
>         bInterval               0
>         bMaxBurst               0
>     Interface Descriptor:
>       bLength                 9
>       bDescriptorType         4
>       bInterfaceNumber        4
>       bAlternateSetting       0
>       bNumEndpoints           2
>       bInterfaceClass       255 Vendor Specific Class
>       bInterfaceSubClass     66
>       bInterfaceProtocol      1
>       iInterface              0
>       Endpoint Descriptor:
>         bLength                 7
>         bDescriptorType         5
>         bEndpointAddress     0x03  EP 3 OUT
>         bmAttributes            2
>           Transfer Type            Bulk
>           Synch Type               None
>           Usage Type               Data
>         wMaxPacketSize     0x0400  1x 1024 bytes
>         bInterval               0
>         bMaxBurst               0
>       Endpoint Descriptor:
>         bLength                 7
>         bDescriptorType         5
>         bEndpointAddress     0x85  EP 5 IN
>         bmAttributes            2
>           Transfer Type            Bulk
>           Synch Type               None
>           Usage Type               Data
>         wMaxPacketSize     0x0400  1x 1024 bytes
>         bInterval               0
>         bMaxBurst               0
> Binary Object Store Descriptor:
>   bLength                 5
>   bDescriptorType        15
>   wTotalLength       0x0016
>   bNumDeviceCaps          2
>   USB 2.0 Extension Device Capability:
>     bLength                 7
>     bDescriptorType        16
>     bDevCapabilityType      2
>     bmAttributes   0x00000006
>       BESL Link Power Management (LPM) Supported
>   SuperSpeed USB Device Capability:
>     bLength                10
>     bDescriptorType        16
>     bDevCapabilityType      3
>     bmAttributes         0x00
>     wSpeedsSupported   0x000f
>       Device can operate at Low Speed (1Mbps)
>       Device can operate at Full Speed (12Mbps)
>       Device can operate at High Speed (480Mbps)
>       Device can operate at SuperSpeed (5Gbps)
>     bFunctionalitySupport   1
>       Lowest fully-functional device speed is Full Speed (12Mbps)
>     bU1DevExitLat           1 micro seconds
>     bU2DevExitLat         500 micro seconds
> Device Status:     0x0000
>   (Bus Powered)
Signed-off-by: Zhengjun Zhang <zhangzhengjun@aicrobo.com>
Cc: stable@vger.kernel.org
Signed-off-by: Johan Hovold <johan@kernel.org>

Pull powerpc fixes from Michael Ellerman:

 - Fix random crashes on some 32-bit CPUs by adding isync() after
   locking/unlocking KUEP

 - Fix intermittent crashes when loading modules with strict module RWX

 - Fix a section mismatch introduce by a previous fix.

Thanks to Christophe Leroy, Fabiano Rosas, Laurent Vivier, Murilo
Opsfelder Araújo, Nathan Chancellor, and Stan Johnson.

h# -----BEGIN PGP SIGNATURE-----

* tag 'powerpc-5.14-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/mm: Fix set_memory_*() against concurrent accesses
  powerpc/32s: Fix random crashes by adding isync() after locking/unlocking KUEP
  powerpc/xive: Do not mark xive_request_ipi() as __init

Pull clk driver fixes from Stephen Boyd:

 - Make the regulator state match the GDSC power domain state at boot on
   Qualcomm SoCs so that the regulator isn't turned off inadvertently.

 - Fix earlycon on i.MX6Q SoCs

* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
  clk: qcom: gdsc: Ensure regulator init state matches GDSC state
  clk: imx6q: fix uart earlycon unwork

Pull char/misc driver fixes from Greg KH:
 "Here are some small driver fixes for 5.14-rc7.

  They consist of:

   - revert for an interconnect patch that was found to have problems

   - ipack tpci200 driver fixes for reported problems

   - slimbus messaging and ngd fixes for reported problems

  All are small and have been in linux-next for a while with no reported
  issues"

* tag 'char-misc-5.14-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  ipack: tpci200: fix memory leak in the tpci200_register
  ipack: tpci200: fix many double free issues in tpci200_pci_probe
  slimbus: ngd: reset dma setup during runtime pm
  slimbus: ngd: set correct device for pm
  slimbus: messaging: check for valid transaction id
  slimbus: messaging: start transaction ids from 1 instead of zero
  Revert "interconnect: qcom: icc-rpmh: Add BCMs to commit list in pre_aggregate"

Pull USB fix from Greg KH:
 "Here is a single USB typec tcpm fix for a reported problem for
  5.14-rc7. It showed up in 5.13 and resolves an issue that Hans found.
  It has been in linux-next this week with no reported problems"

* tag 'usb-5.14-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb: typec: tcpm: Fix VDMs sometimes not being forwarded to alt-mode drivers

Pull RISC-V fixes from Palmer Dabbelt:

 - fix the sifive-l2-cache device tree bindings for json-schema
   compatibility. This does not change the intended behavior of the
   binding.

 - avoid improperly freeing necessary resources during early boot.

* tag 'riscv-for-linus-5.14-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: Fix a number of free'd resources in init_resources()
  dt-bindings: sifive-l2-cache: Fix 'select' matching

Pull s390 fix from Vasily Gorbik:

 - fix use after free of zpci_dev in pci code

* tag 's390-5.14-5' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/pci: fix use after free of zpci_dev

Pull mandatory file locking deprecation warning from Jeff Layton:
 "As discussed on the list, this patch just adds a new warning for folks
  who still have mandatory locking enabled and actually mount with '-o
  mand'. I'd like to get this in for v5.14 so we can push this out into
  stable kernels and hopefully reach folks who have mounts with -o mand.

  For now, I'm operating under the assumption that we'll fully remove
  this support in v5.15, but we can move that out if any legitimate
  users of this facility speak up between now and then"

* tag 'locks-v5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux:
  fs: warn about impending deprecation of mandatory locks

Pull block fixes from Jens Axboe:
 "Three fixes from Ming Lei that should go into 5.14:

   - Fix for a kernel panic when iterating over tags for some cases
     where a flush request is present, a regression in this cycle.

   - Request timeout fix

   - Fix flush request checking"

* tag 'block-5.14-2021-08-20' of git://git.kernel.dk/linux-block:
  blk-mq: fix is_flush_rq
  blk-mq: fix kernel panic during iterating over flush request
  blk-mq: don't grab rq's refcount in blk_mq_check_expired()

Pull io_uring fixes from Jens Axboe:
 "A few small fixes that should go into this release:

   - Fix never re-assigning an initial error value for io_uring_enter()
     for SQPOLL, if asked to do nothing

   - Fix xa_alloc_cycle() return value checking, for cases where we have
     wrapped around

   - Fix for a ctx pin issue introduced in this cycle (Pavel)"

* tag 'io_uring-5.14-2021-08-20' of git://git.kernel.dk/linux-block:
  io_uring: fix xa_alloc_cycle() error return value check
  io_uring: pin ctx on fallback execution
  io_uring: only assign io_uring_enter() SQPOLL error in actual error case

We've had CONFIG_MANDATORY_FILE_LOCKING since 2015 and a lot of distros
have disabled it. Warn the stragglers that still use "-o mand" that
we'll be dropping support for that mount option.

Cc: stable@vger.kernel.org
Signed-off-by: Jeff Layton <jlayton@kernel.org>

We currently check for ret != 0 to indicate error, but '1' is a valid
return and just indicates that the allocation succeeded with a wrap.
Correct the check to be for < 0, like it was before the xarray
conversion.

Cc: stable@vger.kernel.org
Fixes: 61cf9370 ("io_uring: Convert personality_idr to XArray")
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Pull ACPI fixes from Rafael Wysocki:
 "These fix two mistakes in new code.

  Specifics:

   - Prevent confusing messages from being printed if the PRMT table is
     not present or there are no PRM modules (Aubrey Li).

   - Fix the handling of suspend-to-idle entry and exit in the case when
     the Microsoft UUID is used with the Low-Power S0 Idle _DSM
     interface (Mario Limonciello)"

* tag 'acpi-5.14-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: PM: s2idle: Invert Microsoft UUID entry and exit
  ACPI: PRM: Deal with table not present or no module found

Pull power management fixes from Rafael Wysocki:
 "These fix some issues in the ARM cpufreq drivers and in the operating
  performance points (OPP) framework.

  Specifics:

   - Fix useless WARN() in the OPP core and prevent a noisy warning
     from being printed by OPP _put functions (Dmitry Osipenko).

   - Fix error path when allocation failed in the arm_scmi cpufreq
     driver (Lukasz Luba).

   - Blacklist Qualcomm sc8180x and Qualcomm sm8150 in
     cpufreq-dt-platdev (Bjorn Andersson, Thara Gopinath).

   - Forbid cpufreq for 1.2 GHz variant in the armada-37xx cpufreq
     driver (Marek Behún)"

* tag 'pm-5.14-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  opp: Drop empty-table checks from _put functions
  cpufreq: armada-37xx: forbid cpufreq for 1.2 GHz variant
  cpufreq: blocklist Qualcomm sm8150 in cpufreq-dt-platdev
  cpufreq: arm_scmi: Fix error path when allocation failed
  opp: remove WARN when no valid OPPs remain
  cpufreq: blacklist Qualcomm sc8180x in cpufreq-dt-platdev

Merge misc fixes from Andrew Morton:
 "10 patches.

  Subsystems affected by this patch series: MAINTAINERS and mm (shmem,
  pagealloc, tracing, memcg, memory-failure, vmscan, kfence, and
  hugetlb)"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  hugetlb: don't pass page cache pages to restore_reserve_on_error
  kfence: fix is_kfence_address() for addresses below KFENCE_POOL_SIZE
  mm: vmscan: fix missing psi annotation for node_reclaim()
  mm/hwpoison: retry with shake_page() for unhandlable pages
  mm: memcontrol: fix occasional OOMs due to proportional memory.low reclaim
  MAINTAINERS: update ClangBuiltLinux IRC chat
  mmflags.h: add missing __GFP_ZEROTAGS and __GFP_SKIP_KASAN_POISON names
  mm/page_alloc: don't corrupt pcppage_migratetype
  Revert "mm: swap: check if swap backing device is congested or not"
  Revert "mm/shmem: fix shmem_swapin() race with swapoff"

Pull drm fixes from Dave Airlie:
 "Regularly scheduled fixes. The ttm one solves a problem of GPU drivers
  failing to load if debugfs is off in Kconfig, otherwise the i915 and
  mediatek, and amdgpu fixes all fairly normal.

  Nouveau has a couple of display fixes, but it has a fix for a
  longstanding race condition in it's memory manager code, and the fix
  mostly removes some code that wasn't working properly and has no
  userspace users. This fix makes the diffstat kinda larger but in a
  good (negative line-count) way.

  core:
   - fix drm_wait_vblank uapi copying bug

  ttm:
   - fix debugfs init when debugfs is off

  amdgpu:
   - vega10 SMU workload fix
   - DCN VM fix
   - DCN 3.01 watermark fix

  amdkfd:
   - SVM fix

  nouveau:
   - ampere display fixes
   - remove MM misfeature to fix a longstanding race condition

  i915:
   - tweaked display workaround for all PCHs
   - eDP MSO pipe sanity for ADL-P fix
   - remove unused symbol export

  mediatek:
   - AAL output size setting
   - Delete component in remove function"

* tag 'drm-fixes-2021-08-20-3' of git://anongit.freedesktop.org/drm/drm:
  drm/amd/display: Use DCN30 watermark calc for DCN301
  drm/i915/dp: remove superfluous EXPORT_SYMBOL()
  drm/i915/edp: fix eDP MSO pipe sanity checks for ADL-P
  drm/i915: Tweaked Wa_14010685332 for all PCHs
  drm/nouveau: rip out nvkm_client.super
  drm/nouveau: block a bunch of classes from userspace
  drm/nouveau/fifo/nv50-: rip out dma channels
  drm/nouveau/kms/nv50: workaround EFI GOP window channel format differences
  drm/nouveau/disp: power down unused DP links during init
  drm/nouveau: recognise GA107
  drm: Copy drm_wait_vblank to user before returning
  drm/amd/display: Ensure DCN save after VM setup
  drm/amdkfd: fix random KFDSVMRangeTest.SetGetAttributesTest test failure
  drm/amd/pm: change the workload type for some cards
  Revert "drm/amd/pm: fix workload mismatch on vega10"
  drm: ttm: Don't bail from ttm_global_init if debugfs_create_dir fails
  drm/mediatek: Add component_del in OVL and COLOR remove function
  drm/mediatek: Add AAL output size configuration

Pull PCI fixes from Bjorn Helgaas:

 - Add Rahul Tanwar as Intel LGM Gateway PCIe maintainer (Rahul Tanwar)

 - Add Jim Quinlan et al as Broadcom STB PCIe maintainers (Jim Quinlan)

 - Increase D3hot-to-D0 delay for AMD Renoir/Cezanne XHCI (Marcin
   Bachry)

 - Correct iomem_get_mapping() usage for legacy_mem sysfs (Krzysztof
   Wilczyński)

* tag 'pci-v5.14-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI/sysfs: Use correct variable for the legacy_mem sysfs object
  PCI: Increase D3 delay for AMD Renoir/Cezanne XHCI
  MAINTAINERS: Add Jim Quinlan et al as Broadcom STB PCIe maintainers
  MAINTAINERS: Add Rahul Tanwar as Intel LGM Gateway PCIe maintainer

Pull MMC host fixes from Ulf Hansson:

 - dw_mmc: Fix hang on data CRC error

 - mmci: Fix voltage switch procedure for the stm32 variant

 - sdhci-iproc: Fix some clock issues for BCM2711

 - sdhci-msm: Fixup software timeout value

* tag 'mmc-v5.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: sdhci-iproc: Set SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN on BCM2711
  mmc: sdhci-iproc: Cap min clock frequency on BCM2711
  mmc: sdhci-msm: Update the software timeout value for sdhc
  mmc: mmci: stm32: Check when the voltage switch procedure should be done
  mmc: dw_mmc: Fix hang on data CRC error

Pull more sound fixes from Takashi Iwai:
 "This is a quick follow up for 5.14: a fix for a very recently
  introduced regression on ASoC Intel Atom driver, and another trivial
  HD-audio quirk for HP laptops"

* tag 'sound-5.14-rc7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ASoC: intel: atom: Fix breakage for PCM buffer address setup
  ALSA: hda/realtek: Limit mic boost on HP ProBook 445 G8

Pull arm64 fixes from Will Deacon:

 - Fix cleaning of vDSO directories

 - Ensure CNTHCTL_EL2 is fully initialised when booting at EL2

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: initialize all of CNTHCTL_EL2
  arm64: clean vdso & vdso32 files

* acpi-pm:
  ACPI: PM: s2idle: Invert Microsoft UUID entry and exit

Pull iommu fixes from Joerg Roedel:

 - Fix for a potential NULL-ptr dereference in IOMMU core code

 - Two resource leak fixes

 - Cache flush fix in the Intel VT-d driver

* tag 'iommu-fixes-v5.14-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/vt-d: Fix incomplete cache flush in intel_pasid_tear_down_entry()
  iommu/vt-d: Fix PASID reference leak
  iommu: Check if group is NULL before remove device
  iommu/dma: Fix leak in non-contiguous API

* pm-opp:
  opp: Drop empty-table checks from _put functions
  opp: remove WARN when no valid OPPs remain

syzbot hit kernel BUG at fs/hugetlbfs/inode.c:532 as described in [1].
This BUG triggers if the HPageRestoreReserve flag is set on a page in
the page cache.  It should never be set, as the routine
huge_add_to_page_cache explicitly clears the flag after adding a page to
the cache.

The only code other than huge page allocation which sets the flag is
restore_reserve_on_error.  It will potentially set the flag in rare out
of memory conditions.  syzbot was injecting errors to cause memory
allocation errors which exercised this specific path.

The code in restore_reserve_on_error is doing the right thing.  However,
there are instances where pages in the page cache were being passed to
restore_reserve_on_error.  This is incorrect, as once a page goes into
the cache reservation information will not be modified for the page
until it is removed from the cache.  Error paths do not remove pages
from the cache, so even in the case of error, the page will remain in
the cache and no reservation adjustment is needed.

Modify routines that potentially call restore_reserve_on_error with a
page cache page to no longer do so.

Note on fixes tag: Prior to commit 846be085 ("mm/hugetlb: expand
restore_reserve_on_error functionality") the routine would not process
page cache pages because the HPageRestoreReserve flag is not set on such
pages.  Therefore, this issue could not be trigggered.  The code added
by commit 846be085 ("mm/hugetlb: expand restore_reserve_on_error
functionality") is needed and correct.  It exposed incorrect calls to
restore_reserve_on_error which is the root cause addressed by this
commit.

[1] https://lore.kernel.org/linux-mm/00000000000050776d05c9b7c7f0@google.com/

Link: https://lkml.kernel.org/r/20210818213304.37038-1-mike.kravetz@oracle.com
Fixes: 846be085 ("mm/hugetlb: expand restore_reserve_on_error functionality")
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Reported-by: <syzbot+67654e51e54455f1c585@syzkaller.appspotmail.com>
Cc: Mina Almasry <almasrymina@google.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Naoya Horiguchi <naoya.horiguchi@linux.dev>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Originally the addr != NULL check was meant to take care of the case
where __kfence_pool == NULL (KFENCE is disabled).  However, this does
not work for addresses where addr > 0 && addr < KFENCE_POOL_SIZE.

This can be the case on NULL-deref where addr > 0 && addr < PAGE_SIZE or
any other faulting access with addr < KFENCE_POOL_SIZE.  While the
kernel would likely crash, the stack traces and report might be
confusing due to double faults upon KFENCE's attempt to unprotect such
an address.

Fix it by just checking that __kfence_pool != NULL instead.

Link: https://lkml.kernel.org/r/20210818130300.2482437-1-elver@google.com
Fixes: 0ce20dd8 ("mm: add Kernel Electric-Fence infrastructure")
Signed-off-by: Marco Elver <elver@google.com>
Reported-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
Acked-by: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: <stable@vger.kernel.org>    [5.12+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

In a debugging session the other day, Rik noticed that node_reclaim()
was missing memstall annotations.  This means we'll miss pressure and
lost productivity resulting from reclaim on an overloaded local NUMA
node when vm.zone_reclaim_mode is enabled.

There haven't been any reports, but that's likely because
vm.zone_reclaim_mode hasn't been a commonly used feature recently, and
the intersection between such setups and psi users is probably nil.

But secondary memory such as CXL-connected DIMMS, persistent memory etc,
and the page demotion patches that handle them
(https://lore.kernel.org/lkml/20210401183216.443C4443@viggo.jf.intel.com/)
could soon make this a more common codepath again.

Link: https://lkml.kernel.org/r/20210818152457.35846-1-hannes@cmpxchg.orgSigned-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reported-by: Rik van Riel <riel@surriel.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

HWPoisonHandlable() sometimes returns false for typical user pages due
to races with average memory events like transfers over LRU lists.  This
causes failures in hwpoison handling.

There's retry code for such a case but does not work because the retry
loop reaches the retry limit too quickly before the page settles down to
handlable state.  Let get_any_page() call shake_page() to fix it.

[naoya.horiguchi@nec.com: get_any_page(): return -EIO when retry limit reached]
  Link: https://lkml.kernel.org/r/20210819001958.2365157-1-naoya.horiguchi@linux.dev

Link: https://lkml.kernel.org/r/20210817053703.2267588-1-naoya.horiguchi@linux.dev
Fixes: 25182f05 ("mm,hwpoison: fix race with hugetlb page allocation")
Signed-off-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Reported-by: Tony Luck <tony.luck@intel.com>
Reviewed-by: Yang Shi <shy828301@gmail.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: <stable@vger.kernel.org>		[5.13+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

We've noticed occasional OOM killing when memory.low settings are in
effect for cgroups.  This is unexpected and undesirable as memory.low is
supposed to express non-OOMing memory priorities between cgroups.

The reason for this is proportional memory.low reclaim.  When cgroups
are below their memory.low threshold, reclaim passes them over in the
first round, and then retries if it couldn't find pages anywhere else.
But when cgroups are slightly above their memory.low setting, page scan
force is scaled down and diminished in proportion to the overage, to the
point where it can cause reclaim to fail as well - only in that case we
currently don't retry, and instead trigger OOM.

To fix this, hook proportional reclaim into the same retry logic we have
in place for when cgroups are skipped entirely.  This way if reclaim
fails and some cgroups were scanned with diminished pressure, we'll try
another full-force cycle before giving up and OOMing.

[akpm@linux-foundation.org: coding-style fixes]

Link: https://lkml.kernel.org/r/20210817180506.220056-1-hannes@cmpxchg.org
Fixes: 9783aa99 ("mm, memcg: proportional memory.{low,min} reclaim")
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reported-by: Leon Yang <lnyng@fb.com>
Reviewed-by: Rik van Riel <riel@surriel.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Roman Gushchin <guro@fb.com>
Acked-by: Chris Down <chris@chrisdown.name>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: <stable@vger.kernel.org>		[5.4+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Everyone has moved from Freenode to Libera so updated the channel entry
for MAINTAINERS.

Link: https://github.com/ClangBuiltLinux/linux/issues/1402
Link: https://lkml.kernel.org/r/20210818022339.3863058-1-nathan@kernel.orgSigned-off-by: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

printk("%pGg") outputs these two flags as hexadecimal number, rather
than as a string, e.g:

	GFP_KERNEL|0x1800000

Fix this by adding missing names of __GFP_ZEROTAGS and
__GFP_SKIP_KASAN_POISON flags to __def_gfpflag_names.

Link: https://lkml.kernel.org/r/20210816133502.590-1-rppt@kernel.org
Fixes: 013bb59d ("arm64: mte: handle tags zeroing at page allocation time")
Fixes: c275c5c6 ("kasan: disable freed user page poisoning with HW tags")
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

When placing pages on a pcp list, migratetype values over
MIGRATE_PCPTYPES get added to the MIGRATE_MOVABLE pcp list.

However, the actual migratetype is preserved in the page and should
not be changed to MIGRATE_MOVABLE or the page may end up on the wrong
free_list.

The impact is that HIGHATOMIC or CMA pages getting bulk freed from the
PCP lists could potentially end up on the wrong buddy list.  There are
various consequences but minimally NR_FREE_CMA_PAGES accounting could
get screwed up.

[mgorman@techsingularity.net: changelog update]

Link: https://lkml.kernel.org/r/20210811182917.2607994-1-opendmb@gmail.com
Fixes: df1acc85 ("mm/page_alloc: avoid conflating IRQs disabled with zone->lock")
Signed-off-by: Doug Berger <opendmb@gmail.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Mel Gorman <mgorman@techsingularity.net>
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>