Commit graph

1015345 commits

Author SHA1 Message Date
Lorenzo Bianconi
a61826203b mt76: connac: alaways wake the device before scanning
move scanning check from mt76_connac_power_save_sched routine
to mt7921_pm_power_save_work/mt7615_pm_power_save_work ones

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2021-04-21 20:55:53 +02:00
Lorenzo Bianconi
1d4f5c68a0 mt76: mt7921: get rid of useless MT76_STATE_PM in mt7921_mac_work
Remove useless MT76_STATE_PM check in mt7921_mac_work since
mt7921_mutex_acquire will wake up the device if necessary

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2021-04-21 20:55:53 +02:00
Lorenzo Bianconi
efe9ec5cec mt76: connac: remove MT76_STATE_PM in mac_tx_free
Get rid of MT76_STATE_PM chec in mt7615_mac_tx_free and
mt7921_mac_tx_free since we already rely on mt76_connac_pm_unref in the
NAPI callback.
Remove mt76_connac_power_save_sched calls in mt7615_mac_tx_free and
mt7921_mac_tx_free

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2021-04-21 20:55:53 +02:00
Lorenzo Bianconi
ec7bd7b4a9 mt76: connac: check wake refcount in mcu_fw_pmctrl
In order to avoid synchronization races between tx and rx path, rely on
mt76_connac_skip_fw_pmctrl putting the chip in sleep mode for mt7921 and
mt7663 devices

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2021-04-21 20:55:53 +02:00
Lorenzo Bianconi
4f9b3aeb83 mt76: connac: unschedule ps_work in mt76_connac_pm_wake
In order to avoid synchronization issues between wake and ps works,
cancel ps_work in mt76_connac_pm_wake routine

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2021-04-21 20:55:52 +02:00
Lorenzo Bianconi
db928f1ab9 mt76: mt7663: rely on mt76_connac_pm_ref/mt76_connac_pm_unref in tx/rx napi
Introduce mt7615_poll_rx rx napi callback for mt7663.
Do not access device registers in tx/rx napi if the device is not awake.

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2021-04-21 20:55:52 +02:00
Lorenzo Bianconi
917dccb6ee mt76: mt7921: rely on mt76_connac_pm_ref/mt76_connac_pm_unref in tx/rx napi
Introduce mt7921_poll_rx rx napi callback for mt7921.
Do not access device registers in tx/rx napi if the device is not awake.

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2021-04-21 20:55:52 +02:00
Lorenzo Bianconi
cb8ed33d4b mt76: dma: add the capability to define a custom rx napi poll routine
Add the capability to define a custom rx napi callback for each driver.
This is a preliminary patch to properly support runtime-pm on rx side

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2021-04-21 20:55:52 +02:00
Lorenzo Bianconi
335e97ace2 mt76: mt7663: rely on mt76_connac_pm_ref/mt76_connac_pm_unref in tx path
Introduce mt7615_tx_worker routine as mt76 tx worker callback for
mt7663.
Rely on mt76_connac_pm_ref/mt76_connac_pm_unref to check PM state and
increment/decrement wake counter

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2021-04-21 20:55:52 +02:00
Lorenzo Bianconi
9800462ddc mt76: mt7921: rely on mt76_connac_pm_ref/mt76_connac_pm_unref in tx path
Introduce mt7921_tx_worker routine as mt76 tx worker callback for
mt7921.
Rely on mt76_connac_pm_ref/mt76_connac_pm_unref to check PM state and
increment/decrement wake counter

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2021-04-21 20:55:52 +02:00
Lorenzo Bianconi
7f2bc8ba11 mt76: connac: introduce wake counter for fw_pmctrl synchronization
Introduce wake counter and related spinlock in order to synchronize
tx/rx path and fw_pmctrl request.

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2021-04-21 20:55:52 +02:00
Lorenzo Bianconi
7cd740f0e4 mt76: mt7663: fix a race between mt7615_mcu_drv_pmctrl and mt7615_mcu_fw_pmctrl
Introduce a mutex in order to avoid a race between mt7615_mcu_lp_drv_pmctrl and
mt7615_mcu_fw_pmctrl routines since they are run two independent works

Fixes: 1f549009b5 ("mt76: mt7615: do not request {driver,fw}_own if already granted")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2021-04-21 20:55:52 +02:00
Lorenzo Bianconi
fad90e43ea mt76: mt7921: fix a race between mt7921_mcu_drv_pmctrl and mt7921_mcu_fw_pmctrl
Introduce a mutex in order to avoid a race between mt7921_mcu_drv_pmctrl and
mt7921_mcu_fw_pmctrl routines since they are run two independent works

Fixes: 1d8efc741d ("mt76: mt7921: introduce Runtime PM support")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2021-04-21 20:55:52 +02:00
Lorenzo Bianconi
d5a2abb0db mt76: mt7921: remove leftover function declaration
Get rid of leftover mt7921_mcu_add_bss_info routine declaration

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2021-04-21 20:55:51 +02:00
Lorenzo Bianconi
f4f4089eb1 mt76: connac: move mcu_update_arp_filter in mt76_connac module
Move mt76_connac_mcu_update_arp_filter in mt76_connac module since the
code is shared between mt7615 and mt7921

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2021-04-21 20:55:51 +02:00
Rafał Miłecki
08e9fdfbb2 dt-bindings: thermal: brcm,ns-thermal: Convert to the json-schema
This helps validating DTS files.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210420210104.10555-1-zajec5@gmail.com
2021-04-21 20:42:48 +02:00
Mark Brown
823543b739
Merge series "mfd/rtc/regulator: Drop board file support for Samsung PMIC" from Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>:
Hi,

The Samsung PMIC drivers since long time are used only on devicetree
platforms (Samsung Exynos) and there are no users with board files.

Drop the support for board files entirely and depend on OF for matching.

This makes the code smaller and simpler.

Dependencies
============
The MFD pieces are rebased on my previous sec-core dirver changes:
mfd: sec: Simplify getting of_device_id match data
https://lore.kernel.org/linux-samsung-soc/20210420113929.278082-1-krzysztof.kozlowski@canonical.com/T/#t

Applying - can be independent
=============================
The last RTC and regulator patches can be picked up independently via
regulator and rtc trees.  There are no board files currently, so the
code in these drivers is basically dead code and feature-bisection is
preserved.

Best regards,
Krzysztof

Krzysztof Kozlowski (9):
  mfd: sec: Drop support for board files and require devicetree
  mfd: sec: Remove unused cfg_pmic_irq in platform data
  mfd: sec: Remove unused device_type in platform data
  mfd: sec: Remove unused irq_base in platform data
  mfd: sec: Enable wakeup from suspend via devicetree property
  mfd: sec: Remove unused platform data members
  rtc: s5m: Remove reference to parent's device pdata
  regulator: s2mpa01: Drop initialization via platform data
  regulator: s2mps11: Drop initialization via platform data

 drivers/mfd/Kconfig              |  1 +
 drivers/mfd/sec-core.c           | 64 +++++---------------------------
 drivers/mfd/sec-irq.c            |  4 +-
 drivers/regulator/s2mpa01.c      |  4 --
 drivers/regulator/s2mps11.c      | 22 +----------
 drivers/rtc/rtc-s5m.c            |  6 ---
 include/linux/mfd/samsung/core.h | 33 ----------------
 7 files changed, 14 insertions(+), 120 deletions(-)

--
2.25.1
2021-04-21 19:35:06 +01:00
Adam Ford
36e69da892 net: ethernet: ravb: Fix release of refclk
The call to clk_disable_unprepare() can happen before priv is
initialized. This means moving clk_disable_unprepare out of
out_release into a new label.

Fixes: 8ef7adc6be ("net: ethernet: ravb: Enable optional refclk")
Signed-off-by: Adam Ford <aford173@gmail.com>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-21 11:17:09 -07:00
Bjorn Andersson
47a017f339 net: qrtr: Avoid potential use after free in MHI send
It is possible that the MHI ul_callback will be invoked immediately
following the queueing of the skb for transmission, leading to the
callback decrementing the refcount of the associated sk and freeing the
skb.

As such the dereference of skb and the increment of the sk refcount must
happen before the skb is queued, to avoid the skb to be used after free
and potentially the sk to drop its last refcount..

Fixes: 6e728f3213 ("net: qrtr: Add MHI transport layer")
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-21 11:01:03 -07:00
Martin Schiller
357a07c266 net: phy: intel-xway: enable integrated led functions
The Intel xway phys offer the possibility to deactivate the integrated
LED function and to control the LEDs manually.
If this was set by the bootloader, it must be ensured that the
integrated LED function is enabled for all LEDs when loading the driver.

Before commit 6e2d85ec05 ("net: phy: Stop with excessive soft reset")
the LEDs were enabled by a soft-reset of the PHY (using
genphy_soft_reset). Initialize the XWAY_MDIO_LED with it's default
value (which is applied during a soft reset) instead of adding back
the soft reset. This brings back the default LED configuration while
still preventing an excessive amount of soft resets.

Fixes: 6e2d85ec05 ("net: phy: Stop with excessive soft reset")
Signed-off-by: Martin Schiller <ms@dev.tdt.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-21 10:59:17 -07:00
Yoshihiro Shimoda
5718458b09 net: renesas: ravb: Fix a stuck issue when a lot of frames are received
When a lot of frames were received in the short term, the driver
caused a stuck of receiving until a new frame was received. For example,
the following command from other device could cause this issue.

    $ sudo ping -f -l 1000 -c 1000 <this driver's ipaddress>

The previous code always cleared the interrupt flag of RX but checks
the interrupt flags in ravb_poll(). So, ravb_poll() could not call
ravb_rx() in the next time until a new RX frame was received if
ravb_rx() returned true. To fix the issue, always calls ravb_rx()
regardless the interrupt flags condition.

Fixes: c156633f13 ("Renesas Ethernet AVB driver proper")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-21 10:56:37 -07:00
Ong Boon Leong
5e6038b88a net: stmmac: fix TSO and TBS feature enabling during driver open
TSO and TBS cannot co-exist and current implementation requires two
fixes:

 1) stmmac_open() does not need to call stmmac_enable_tbs() because
    the MAC is reset in stmmac_init_dma_engine() anyway.
 2) Inside stmmac_hw_setup(), we should call stmmac_enable_tso() for
    TX Q that is _not_ configured for TBS.

Fixes: 579a25a854 ("net: stmmac: Initial support for TBS")
Signed-off-by: Ong Boon Leong <boon.leong.ong@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-21 10:51:26 -07:00
Ong Boon Leong
17cb00704c stmmac: intel: set TSO/TBS TX Queues default settings
TSO and TBS cannot coexist, for now we set Intel mGbE controller to use
below TX Queue mapping: TxQ0 uses TSO and the rest of TXQs supports TBS.

Signed-off-by: Ong Boon Leong <boon.leong.ong@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-21 10:49:02 -07:00
Oleksij Rempel
70a7c484c7 net: dsa: fix bridge support for drivers without port_bridge_flags callback
Starting with patch:
a8b659e7ff ("net: dsa: act as passthrough for bridge port flags")

drivers without "port_bridge_flags" callback will fail to join the bridge.
Looking at the code, -EOPNOTSUPP seems to be the proper return value,
which makes at least microchip and atheros switches work again.

Fixes: 5961d6a12c ("net: dsa: inherit the actual bridge port flags at join time")
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-21 10:47:27 -07:00
Dan Carpenter
53e35ebb9a stmmac: intel: unlock on error path in intel_crosststamp()
We recently added some new locking to this function but one error path
was overlooked.  We need to drop the lock before returning.

Fixes: f4da56529d ("net: stmmac: Add support for external trigger timestamping")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Wong Vee Khee <vee.khee.wong@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-21 10:27:55 -07:00
Yinjun Zhang
90b669d65d nfp: devlink: initialize the devlink port attribute "lanes"
The number of lanes of devlink port should be correctly initialized
when registering the port, so that the input check when running
"devlink port split <port> count <N>" can pass.

Fixes: a21cf0a833 ("devlink: Add a new devlink port lanes attribute and pass to netlink")
Signed-off-by: Yinjun Zhang <yinjun.zhang@corigine.com>
Signed-off-by: Louis Peens <louis.peens@corigine.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-21 10:26:35 -07:00
David S. Miller
2acf63c16a Merge branch 'mv88e6xxx-small-improvements'
Tobias Waldekranz says:

====================
net: dsa: mv88e6xxx: Tiny fixes/improvements

Just some small things I have noticed that do not fit in any other
series.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-21 10:25:09 -07:00
Tobias Waldekranz
836021a2d0 net: dsa: mv88e6xxx: Export cross-chip PVT as devlink region
Export the raw PVT data in a devlink region so that it can be
inspected from userspace and compared to the current bridge
configuration.

Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-21 10:25:09 -07:00
Tobias Waldekranz
281140a0a2 net: dsa: mv88e6xxx: Fix off-by-one in VTU devlink region size
In the unlikely event of the VTU being loaded to the brim with 4k
entries, the last one was placed in the buffer, but the size reported
to devlink was off-by-one. Make sure that the final entry is available
to the caller.

Fixes: ca4d632aef ("net: dsa: mv88e6xxx: Export VTU as devlink region")
Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-21 10:25:09 -07:00
Tobias Waldekranz
78e70dbcfd net: dsa: mv88e6xxx: Correct spelling of define "ADRR" -> "ADDR"
Because ADRR is not a thing.

Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-21 10:25:09 -07:00
David S. Miller
0e91e9a5d6 Merge branch 'octeontx2-af-cn10k'
Srujana Challa says:

====================
Add support for CN10K CPT block

OcteonTX3 (CN10K) silicon is a Marvell next-gen silicon. CN10K CPT
introduces new features like reassembly support and some feature
enhancements.
This patchset adds new mailbox messages and some minor changes to
existing mailbox messages to support CN10K CPT.

v1-v2
Fixed sparse warnings.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-21 10:23:17 -07:00
Srujana Challa
2e2ee4cd0a octeontx2-af: Add mailbox for CPT stats
Adds a new mailbox to get CPT stats, includes performance
counters, CPT engines status and RXC status.

Signed-off-by: Narayana Prasad Raju Atherya <pathreya@marvell.com>
Signed-off-by: Srujana Challa <schalla@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-21 10:23:17 -07:00
Srujana Challa
ecad2ce8c4 octeontx2-af: cn10k: Add mailbox to configure reassembly timeout
CN10K CPT coprocessor includes a component named RXC which
is responsible for reassembly of inner IP packets. RXC has
the feature to evict oldest entries based on age/threshold.
This patch adds a new mailbox to configure reassembly age
or threshold.

Signed-off-by: Jerin Jacob Kollanukkaran <jerinj@marvell.com>
Signed-off-by: Srujana Challa <schalla@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-21 10:23:17 -07:00
Srujana Challa
e4bbc5c53a octeontx2-af: cn10k: Mailbox changes for CN10K CPT
Adds changes to existing CPT mailbox messages to support
CN10K CPT block. This patch also adds new register defines
for CN10K CPT.

Signed-off-by: Vidya Sagar Velumuri <vvelumuri@marvell.com>
Signed-off-by: Srujana Challa <schalla@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-21 10:23:17 -07:00
Linus Torvalds
16fc44d638 MMC host:
- meson-gx: Replace WARN_ONCE with dev_warn_once for non-optimal sg-alignment
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Merge tag 'mmc-v5.12-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc

Pull MMC fix from Ulf Hansson:
 "Replace WARN_ONCE with dev_warn_once for non-optimal sg-alignment in
  the meson-gx host driver"

* tag 'mmc-v5.12-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: meson-gx: replace WARN_ONCE with dev_warn_once about scatterlist size alignment in block mode
2021-04-21 10:22:54 -07:00
David S. Miller
542c40957c wireless-drivers fixes for v5.12
As there was -rc8 release, one more important fix for v5.12.
 
 iwlwifi
 
 * fix spinlock warning in gen2 devices
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Merge tag 'wireless-drivers-2021-04-21' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers

Kalle Valo says:

====================
wireless-drivers fixes for v5.12

As there was -rc8 release, one more important fix for v5.12.

iwlwifi

* fix spinlock warning in gen2 devices
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-21 10:18:09 -07:00
Christoph Hellwig
60df5de9b0 nvme: cleanup nvme_configure_apst
Remove a level of indentation from the main code implementating the table
search by using a goto for the APST not supported case.  Also move the
main comment above the function.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Niklas Cassel <niklas.cassel@wdc.com>
2021-04-21 19:13:16 +02:00
Christoph Hellwig
53fe2a30bc nvme: do not try to reconfigure APST when the controller is not live
Do not call nvme_configure_apst when the controller is not live, given
that nvme_configure_apst will fail due the lack of an admin queue when
the controller is being torn down and nvme_set_latency_tolerance is
called from dev_pm_qos_hide_latency_tolerance.

Fixes: 510a405d945b("nvme: fix memory leak for power latency tolerance")
Reported-by: Peng Liu <liupeng17@lenovo.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
2021-04-21 19:13:16 +02:00
Hannes Reinecke
74c22990f0 nvme: add 'kato' sysfs attribute
Add a 'kato' controller sysfs attribute to display the current
keep-alive timeout value (if any). This allows userspace to identify
persistent discovery controllers, as these will have a non-zero
KATO value.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-04-21 19:13:15 +02:00
Hannes Reinecke
a70b81bd4d nvme: sanitize KATO setting
According to the NVMe base spec the KATO commands should be sent
at half of the KATO interval, to properly account for round-trip
times.
As we now will only ever send one KATO command per connection we
can easily use the recommended values.
This also fixes a potential issue where the request timeout for
the KATO command does not match the value in the connect command,
which might be causing spurious connection drops from the target.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-04-21 19:13:15 +02:00
Hou Pu
8f864c595b nvmet: avoid queuing keep-alive timer if it is disabled
Issue following command:
nvme set-feature -f 0xf -v 0 /dev/nvme1n1 # disable keep-alive timer
nvme admin-passthru -o 0x18 /dev/nvme1n1  # send keep-alive command
will make keep-alive timer fired and thus delete the controller like
below:

[247459.907635] nvmet: ctrl 1 keep-alive timer (0 seconds) expired!
[247459.930294] nvmet: ctrl 1 fatal error occurred!

Avoid this by not queuing delayed keep-alive if it is disabled when
keep-alive command is received from the admin queue.

Signed-off-by: Hou Pu <houpu.main@gmail.com>
Tested-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-04-21 19:13:15 +02:00
Chris von Recklinghausen
f5d1499ae2 PM: hibernate: x86: Use crc32 instead of md5 for hibernation e820 integrity check
Hibernation fails on a system in fips mode because md5 is used for the e820
integrity check and is not available. Use crc32 instead.

The check is intended to detect whether the E820 memory map provided
by the firmware after cold boot unexpectedly differs from the one that
was in use when the hibernation image was created. In this case, the
hibernation image cannot be restored, as it may cover memory regions
that are no longer available to the OS.

A non-cryptographic checksum such as CRC-32 is sufficient to detect such
inadvertent deviations.

Fixes: 62a03defea ("PM / hibernate: Verify the consistent of e820 memory map by md5 digest")
Reviewed-by: Eric Biggers <ebiggers@google.com>
Tested-by: Dexuan Cui <decui@microsoft.com>
Reviewed-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Chris von Recklinghausen <crecklin@redhat.com>
[ rjw: Subject edit ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-04-21 19:03:37 +02:00
Alexander Monakov
733dda9cc8 cpufreq: Kconfig: fix documentation links
User documentation for cpufreq governors and drivers has been moved to
admin-guide; adjust references from Kconfig entries accordingly.

Remove references from undocumented cpufreq drivers, as well as the
'userspace' cpufreq governor, for which no additional details are
provided in the admin-guide text.

Fixes: 2a0e492798 ("cpufreq: User/admin documentation update and consolidation")
Signed-off-by: Alexander Monakov <amonakov@ispras.ru>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-04-21 19:00:42 +02:00
Calvin Owens
f4be591f14 brd: expose number of allocated pages in debugfs
While the maximum size of each ramdisk is defined either as a module
parameter, or compile time default, it's impossible to know how many pages
have currently been allocated by each ram%d device, since they're
allocated when used and never freed.

This patch creates a new directory at this location:

/sys/kernel/debug/ramdisk_pages/

which will contain a file named "ram%d" for each instantiated ramdisk on
the system. The file is read-only, and read() will output the number of
pages currently held by that ramdisk.

We lose track how much memory a ramdisk is using as pages once used are
simply recycled but never freed.

In instances where we exhaust the size of the ramdisk with a file that
exceeds it, encounter ENOSPC and delete the file for mitigation; df would
show decrease in used and increase in available blocks but the since we
have touched all pages, the memory footprint of the ramdisk does not
reflect the blocks used/available count

...
[root@localhost ~]# mkfs.ext2 /dev/ram15
mke2fs 1.45.6 (20-Mar-2020)
Creating filesystem with 4096 1k blocks and 1024 inodes
[root@localhost ~]# mount /dev/ram15 /mnt/ram15/

[root@localhost ~]# cat
/sys/kernel/debug/ramdisk_pages/ram15
58
[root@kerneltest008.06.prn3 ~]# df /dev/ram15
Filesystem     1K-blocks  Used Available Use% Mounted on
/dev/ram15          3963    31      3728   1% /mnt/ram15
[root@kerneltest008.06.prn3 ~]# dd if=/dev/urandom of=/mnt/ram15/test2
bs=1M count=5
dd: error writing '/mnt/ram15/test2': No space left on device
4+0 records in
3+0 records out
4005888 bytes (4.0 MB, 3.8 MiB) copied, 0.0446614 s, 89.7 MB/s
[root@kerneltest008.06.prn3 ~]# df /mnt/ram15/
Filesystem     1K-blocks  Used Available Use% Mounted on
/dev/ram15          3963  3960         0 100% /mnt/ram15
[root@kerneltest008.06.prn3 ~]# cat
/sys/kernel/debug/ramdisk_pages/ram15
1024
[root@kerneltest008.06.prn3 ~]# rm /mnt/ram15/test2
rm: remove regular file '/mnt/ram15/test2'? y
[root@kerneltest008.06.prn3 /var]# df /dev/ram15
Filesystem     1K-blocks  Used Available Use% Mounted on
/dev/ram15          3963    31      3728   1% /mnt/ram15

# Acutal memory footprint
[root@kerneltest008.06.prn3 /var]# cat
/sys/kernel/debug/ramdisk_pages/ram15
1024
...

This debugfs counter will always reveal the accurate number of
permanently allocated pages to the ramdisk.

Signed-off-by: Calvin Owens <calvinowens@fb.com>
[cleaned up the !CONFIG_DEBUG_FS case and API changes for HEAD]
Signed-off-by: Kyle McMartin <jkkm@fb.com>
[rebased]
Signed-off-by: Saravanan D <saravanand@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-04-21 10:54:48 -06:00
Luke D Jones
2dfbacc65d ACPI: video: use native backlight for GA401/GA502/GA503
Force backlight control in these models to use the native interface
at /sys/class/backlight/amdgpu_bl0.

Signed-off-by: Luke D. Jones <luke@ljones.dev>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-04-21 18:54:41 +02:00
Colin Ian King
c3f2311e4b ACPI: APEI: remove redundant assignment to variable rc
The variable rc is being assigned a value that is never read,
the assignment is redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-04-21 18:51:25 +02:00
Christoph Hellwig
68e6582e8f block: return -EBUSY when there are open partitions in blkdev_reread_part
The switch to go through blkdev_get_by_dev means we now ignore the
return value from bdev_disk_changed in __blkdev_get.  Add a manual
check to restore the old semantics.

Fixes: 4601b4b130 ("block: reopen the device in blkdev_reread_part")
Reported-by: Karel Zak <kzak@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210421160502.447418-1-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-04-21 10:49:37 -06:00
Sean Christopherson
238eca821c KVM: SVM: Allocate SEV command structures on local stack
Use the local stack to "allocate" the structures used to communicate with
the PSP.  The largest struct used by KVM, sev_data_launch_secret, clocks
in at 52 bytes, well within the realm of reasonable stack usage.  The
smallest structs are a mere 4 bytes, i.e. the pointer for the allocation
is larger than the allocation itself.

Now that the PSP driver plays nice with vmalloc pointers, putting the
data on a virtually mapped stack (CONFIG_VMAP_STACK=y) will not cause
explosions.

Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210406224952.4177376-9-seanjc@google.com>
Reviewed-by: Brijesh Singh <brijesh.singh@amd.com>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
[Apply same treatment to PSP migration commands. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-04-21 12:20:07 -04:00
Sean Christopherson
a402e35177 crypto: ccp: Use the stack and common buffer for INIT command
Drop the dedicated init_cmd_buf and instead use a local variable.  Now
that the low level helper uses an internal buffer for all commands,
using the stack for the upper layers is safe even when running with
CONFIG_VMAP_STACK=y.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210406224952.4177376-8-seanjc@google.com>
Reviewed-by: Brijesh Singh <brijesh.singh@amd.com>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-04-21 12:20:07 -04:00
Sean Christopherson
38103671aa crypto: ccp: Use the stack and common buffer for status commands
Drop the dedicated status_cmd_buf and instead use a local variable for
PLATFORM_STATUS.  Now that the low level helper uses an internal buffer
for all commands, using the stack for the upper layers is safe even when
running with CONFIG_VMAP_STACK=y.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210406224952.4177376-7-seanjc@google.com>
Reviewed-by: Brijesh Singh <brijesh.singh@amd.com>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-04-21 12:20:07 -04:00