Tracepoints were previously implemented but not documented till this patch
series.
Signed-off-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
Reviewed-by: Gal Pressman <gal@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Provide information for Kconfig flags defined but not documented till this
patch series for the mlx5 driver.
Signed-off-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
Reviewed-by: Gal Pressman <gal@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
The mlx5 device driver documentation page has grown in size and should be
split into multiple subpages. This change also contains a table of contents
for these new subpages.
Signed-off-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
Reviewed-by: Gal Pressman <gal@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
mpesw definitions should be in mpesw.h and not lag.h.
Signed-off-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
It's redundant and incorrect to check lag is also sriov mode.
Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
There is no need to allocate the bool variable and can just return the value.
Signed-off-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Use the existing wrapper mlx5_lag_dev() to access the lag object from
dev for better maintainability and consistent code.
Signed-off-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Update the function to log an error to the user if failing to offload
the rule and while there add correct prefix for the function name.
Signed-off-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
D. Wythe says:
====================
net/smc: optimize the parallelism of SMC-R connections
This patch set attempts to optimize the parallelism of SMC-R connections,
mainly to reduce unnecessary blocking on locks, and to fix exceptions that
occur after thoses optimization.
According to Off-CPU graph, SMC worker's off-CPU as that:
smc_close_passive_work (1.09%)
smcr_buf_unuse (1.08%)
smc_llc_flow_initiate (1.02%)
smc_listen_work (48.17%)
__mutex_lock.isra.11 (47.96%)
An ideal SMC-R connection process should only block on the IO events
of the network, but it's quite clear that the SMC-R connection now is
queued on the lock most of the time.
The goal of this patchset is to achieve our ideal situation where
network IO events are blocked for the majority of the connection lifetime.
There are three big locks here:
1. smc_client_lgr_pending & smc_server_lgr_pending
2. llc_conf_mutex
3. rmbs_lock & sndbufs_lock
And an implementation issue:
1. confirm/delete rkey msg can't be sent concurrently while
protocol allows indeed.
Unfortunately,The above problems together affect the parallelism of
SMC-R connection. If any of them are not solved. our goal cannot
be achieved.
After this patch set, we can get a quite ideal off-CPU graph as
following:
smc_close_passive_work (41.58%)
smcr_buf_unuse (41.57%)
smc_llc_do_delete_rkey (41.57%)
smc_listen_work (39.10%)
smc_clc_wait_msg (13.18%)
tcp_recvmsg_locked (13.18)
smc_listen_find_device (25.87%)
smcr_lgr_reg_rmbs (25.87%)
smc_llc_do_confirm_rkey (25.87%)
We can see that most of the waiting times are waiting for network IO
events. This also has a certain performance improvement on our
short-lived conenction wrk/nginx benchmark test:
+--------------+------+------+-------+--------+------+--------+
|conns/qps |c4 | c8 | c16 | c32 | c64 | c200 |
+--------------+------+------+-------+--------+------+--------+
|SMC-R before |9.7k | 10k | 10k | 9.9k | 9.1k | 8.9k |
+--------------+------+------+-------+--------+------+--------+
|SMC-R now |13k | 19k | 18k | 16k | 15k | 12k |
+--------------+------+------+-------+--------+------+--------+
|TCP |15k | 35k | 51k | 80k | 100k | 162k |
+--------------+------+------+-------+--------+------+--------+
The reason why the benefit is not obvious after the number of connections
has increased dues to workqueue. If we try to change workqueue to UNBOUND,
we can obtain at least 4-5 times performance improvement, reach up to half
of TCP. However, this is not an elegant solution, the optimization of it
will be much more complicated. But in any case, we will submit relevant
optimization patches as soon as possible.
Please note that the premise here is that the lock related problem
must be solved first, otherwise, no matter how we optimize the workqueue,
there won't be much improvement.
Because there are a lot of related changes to the code, if you have
any questions or suggestions, please let me know.
Thanks
D. Wythe
v1 -> v2:
1. Fix panic in SMC-D scenario
2. Fix lnkc related hashfn calculation exception, caused by operator
priority
3. Only wake up one connection if the lnk is not active
4. Delete obsolete unlock logic in smc_listen_work()
5. PATCH format, do Reverse Christmas tree
6. PATCH format, change all xxx_lnk_xxx function to xxx_link_xxx
7. PATCH format, add correct fix tag for the patches for fixes.
8. PATCH format, fix some spelling error
9. PATCH format, rename slow to do_slow
v2 -> v3:
1. add SMC-D support, remove the concept of link cluster since SMC-D has
no link at all. Replace it by lgr decision maker, who provides suggestions
to SMC-D and SMC-R on whether to create new link group.
2. Fix the corruption problem described by PATCH 'fix application
data exception' on SMC-D.
v3 -> v4:
1. Fix panic caused by uninitialization map.
v4 -> v5:
1. Make SMC-D buf creation be serial to avoid Potential error
2. Add a flag to synchronize the success of the first contact
with the ready of the link group, including SMC-D and SMC-R.
3. Fixed possible reference count leak in smc_llc_flow_start().
4. reorder the patch, make bugfix PATCH be ahead.
v5 -> v6:
1. Separate the bugfix patches to make it independent.
2. Merge patch 'fix SMC_CLC_DECL_ERR_REGRMB without smc_server_lgr_pending'
with patch 'remove locks smc_client_lgr_pending and smc_server_lgr_pending'
3. Format code styles, including alignment and reverse christmas tree
style.
4. Fix a possible memory leak in smc_llc_rmt_delete_rkey()
and smc_llc_rmt_conf_rkey().
v6 -> v7:
1. Discard patch attempting to remove global locks
2. Discard patch attempting make confirm/delete rkey process concurrently
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
It's clear that rmbs_lock and sndbufs_lock are aims to protect the
rmbs list or the sndbufs list.
During connection establieshment, smc_buf_get_slot() will always
be invoked, and it only performs read semantics in rmbs list and
sndbufs list.
Based on the above considerations, we replace mutex with rw_semaphore.
Only smc_buf_get_slot() use down_read() to allow smc_buf_get_slot()
run concurrently, other part use down_write() to keep exclusive
semantics.
Signed-off-by: D. Wythe <alibuda@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Unlike smc_buf_create() and smcr_buf_unuse(), smcr_lgr_reg_rmbs() is
exclusive when assigned rmb_desc was not registered, although it can be
executed in parallel when assigned rmb_desc was registered already
and only performs read semtamics on it. Hence, we can not simply replace
it with read semaphore.
The idea here is that if the assigned rmb_desc was registered already,
use read semaphore to protect the critical section, once the assigned
rmb_desc was not registered, keep using keep write semaphore still
to keep its exclusivity.
Thanks to the reusable features of rmb_desc, which allows us to execute
in parallel in most cases.
Signed-off-by: D. Wythe <alibuda@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Following is part of Off-CPU graph during frequent SMC-R short-lived
processing:
process_one_work (51.19%)
smc_close_passive_work (28.36%)
smcr_buf_unuse (28.34%)
rwsem_down_write_slowpath (28.22%)
smc_listen_work (22.83%)
smc_clc_wait_msg (1.84%)
smc_buf_create (20.45%)
smcr_buf_map_usable_links
rwsem_down_write_slowpath (20.43%)
smcr_lgr_reg_rmbs (0.53%)
rwsem_down_write_slowpath (0.43%)
smc_llc_do_confirm_rkey (0.08%)
We can clearly see that during the connection establishment time,
waiting time of connections is not on IO, but on llc_conf_mutex.
What is more important, the core critical area (smcr_buf_unuse() &
smc_buf_create()) only perfroms read semantics on links, we can
easily replace it with read semaphore.
Signed-off-by: D. Wythe <alibuda@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
llc_conf_mutex was used to protect links and link related configurations
in the same link group, for example, add or delete links. However,
in most cases, the protected critical area has only read semantics and
with no write semantics at all, such as obtaining a usable link or an
available rmb_desc.
This patch do simply code refactoring, replace mutex with rw_semaphore,
replace mutex_lock with down_write and replace mutex_unlock with
up_write.
Theoretically, this replacement is equivalent, but after this patch,
we can distinguish lock granularity according to different semantics
of critical areas.
Signed-off-by: D. Wythe <alibuda@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
With each test taking 4 seconds the runtime of pcm-test can add up. Since
generally each card in the system is physically independent and will be
unaffected by what's going on with other cards we can mitigate this by
testing each card in parallel. Make a list of cards as we enumerate the
system and then start a thread for each, then join the threads to ensure
they have all finished. The threads each run the same tests we currently
run for each PCM on the card before exiting.
The list of PCMs is kept global since it helps with global operations
like working out our planned number of tests and identifying missing PCMs
and it seemed neater to check for PCMs on the right card in the card
thread than make every PCM loop iterate over cards as well.
We don't run per-PCM tests in parallel since in embedded systems it can
be the case that resources are shared between the PCMs and operations on
one PCM on a card may constrain what can be done on another PCM on the same
card leading to potentially unstable results.
We use a mutex to ensure that the reporting of results is serialised and we
don't have issues with anything like the current test number, we could do
this in the kselftest framework but it seems like this might cause problems
for other tests that are doing lower level testing and building in
constrained environments such as nolibc so this seems more sensible.
Note that the ordering of the tests can't be guaranteed as things stand,
this does not seem like a major problem since the numbering of tests often
changes as test programs are changed so results parsers are expected to
rely on the test name rather than the test numbers. We also now prefix the
machine generated test name when printing the description of the test since
this is logged before streaming starts.
On my two card desktop system this reduces the overall runtime by a
third.
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230203-alsa-pcm-test-card-thread-v1-1-59941640ebba@kernel.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Current structure includes no field to express the number of messages
copied to user space, thus user space application needs to information
out of the structure to parse the content of structure.
This commit adds a field to express the number of messages copied to user
space since It is more preferable to use self-contained structure.
Kees Cook proposed an idea of annotation for bound of flexible arrays
in his future improvement for flexible-length array in kernel. The
additional field for message count is suitable to the idea as well.
Reference: https://people.kernel.org/kees/bounded-flexible-arrays-in-c
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20230202133708.163936-1-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Add the generic plumbing to detect whether or not the runtime code
regions were constructed with BTI/IBT landing pads by the firmware,
permitting the OS to enable enforcement when mapping these regions into
the OS's address space.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Fix a simple typo in the documentation for bpf_perf_prog_read_value.
Signed-off-by: Florian Lehner <dev@der-flo.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/r/20230203121439.25884-1-dev@der-flo.net
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Vladimir Oltean says:
====================
Updates to ENETC TXQ management
The set ensures that the number of TXQs given by enetc to the network
stack (mqprio or TX hashing) + the number of TXQs given to XDP never
exceeds the number of available TXQs.
These are the first 4 patches of series "[v5,net-next,00/17] ENETC
mqprio/taprio cleanup" from here:
https://patchwork.kernel.org/project/netdevbpf/cover/20230202003621.2679603-1-vladimir.oltean@nxp.com/
There is no change in this version compared to there. I split them off
because this contains a fix for net-next and it would be good if it
could go in quickly. I also did it to reduce the patch count of that
other series, if I need to respin it again.
====================
Link: https://lore.kernel.org/r/20230203001116.3814809-1-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Currently it can happen that an mqprio qdisc is installed with num_tc 8,
and this will reserve 8 (out of 8) TXQs for the network stack. Then we
can attach an XDP program, and this will crop 2 TXQs, leaving just 6 for
mqprio. That's not what the user requested, and we should fail it.
On the other hand, if mqprio isn't requested, we still give the 8 TXQs
to the network stack (with hashing among a single traffic class), but
then, cropping 2 TXQs for XDP is fine, because the user didn't
explicitly ask for any number of TXQs, so no expectations are violated.
Simply put, the logic that mqprio should impose a minimum number of TXQs
for the network never existed. Let's say (more or less arbitrarily) that
without mqprio, the driver expects a minimum number of TXQs equal to the
number of CPUs (on NXP LS1028A, that is either 1, or 2). And with mqprio,
mqprio gives the minimum required number of TXQs.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Since the blamed net-next commit, enetc_setup_xdp_prog() no longer goes
through enetc_open(), and therefore, the function which was supposed to
detect whether a BPF program exists (in order to crop some TX queues
from network stack usage), enetc_num_stack_tx_queues(), no longer gets
called.
We can move the netif_set_real_num_rx_queues() call to enetc_alloc_msix()
(probe time), since it is a runtime invariant. We can do the same thing
with netif_set_real_num_tx_queues(), and let enetc_reconfigure_xdp_cb()
explicitly recalculate and change the number of stack TX queues.
Fixes: c33bfaf91c ("net: enetc: set up XDP program under enetc_reconfigure()")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
enetc_reconfigure() was modified in commit c33bfaf91c ("net: enetc:
set up XDP program under enetc_reconfigure()") to take an optional
callback that runs while the netdev is down, but this callback currently
cannot fail.
Code up the error handling so that the interface is restarted with the
old resources if the callback fails.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
We keep a pointer to the xdp_prog in the private netdev structure as
well; what's replicated per RX ring is done so just for more convenient
access from the NAPI poll procedure.
Simplify enetc_num_stack_tx_queues() by looking at priv->xdp_prog rather
than iterating through the information replicated per RX ring.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Shannon Nelson says:
====================
ionic: code maintenance
These are a few fixes for a hardware bug, a couple of sw bugs,
and a little code cleanup.
====================
Link: https://lore.kernel.org/r/20230202215537.69756-1-shannon.nelson@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
In one version of the HW there is a remote possibility that it
will miss the doorbell ring. This adds a bit of protection to
be sure we don't stall a queue from a missed doorbell.
Fixes: 0f3154e6bc ("ionic: Add Tx and Rx handling")
Signed-off-by: Allen Hubbe <allen.hubbe@amd.com>
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Make sure the q+cq alloc for NotifyQ is clearly documented
and don't bother with unnecessary local variables.
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Clear the interrupt credits before enabling the queue rather
than after to be sure that the enabled queue starts at 0 and
that we don't wipe away possible credits after enabling the
queue.
Fixes: 0f3154e6bc ("ionic: Add Tx and Rx handling")
Signed-off-by: Neel Patel <neel.patel@amd.com>
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Eric Dumazet says:
====================
raw: add drop reasons and use another hash function
Two first patches add drop reasons to raw input processing.
Last patch spreads RAW sockets in the shared hash tables
to avoid long hash buckets in some cases.
====================
Link: https://lore.kernel.org/r/20230202094100.3083177-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Some applications seem to rely on RAW sockets.
If they use private netns, we can avoid piling all RAW
sockets bound to a given protocol into a single bucket.
Also place (struct raw_hashinfo).lock into its own
cache line to limit false sharing.
Alternative would be to have per-netns hashtables,
but this seems too expensive for most netns
where RAW sockets are not used.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Use existing helpers and drop reason codes for RAW input path.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Use existing helpers and drop reason codes for RAW input path.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Jerome provided the information that also the GXL internal PHY doesn't
support MMD register access and EEE. MMD reads return 0xffff, what
results in e.g. completely wrong ethtool --show-eee output.
Therefore use the MMD dummy stubs.
Fixes: d853d145ea ("net: phy: add an option to disable EEE advertisement")
Suggested-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/84432fe4-0be4-bc82-4e5c-557206b40f56@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
In zynqmp platforms where firmware supports dynamic SGMII configuration
but has other non-SGMII ethernet devices, it fails them with no packets
received at the RX interface.
To fix this behaviour perform SGMII dynamic configuration only
for the SGMII phy interface.
Fixes: 32cee78181 ("net: macb: Add zynqmp SGMII dynamic configuration support")
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@amd.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Reported-by: Michal Simek <michal.simek@amd.com>
Tested-by: Michal Simek <michal.simek@amd.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/1675340779-27499-1-git-send-email-radhey.shyam.pandey@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Moshe Shemesh says:
====================
devlink: Move devlink dev code to a separate file
This patchset is moving code from the file leftover.c to new file dev.c.
About 1.3K lines are moved by this patchset covering most of the devlink
dev object callbacks and functionality: reload, eswitch, info, flash and
selftest.
====================
Link: https://lore.kernel.org/r/1675349226-284034-1-git-send-email-moshe@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Move devlink dev selftest callbacks and related code from leftover.c to
file dev.c. No functional change in this patch.
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
As all users of the struct devlink_info_req are already in dev.c, move
this struct from devl_internal.c to be local in dev.c.
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Move devlink dev flash callbacks, helpers and other related code from
leftover.c to dev.c. No functional change in this patch.
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Move devlink dev info callbacks, related drivers helpers functions and
other related code from leftover.c to dev.c. No functional change in
this patch.
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Move devlink dev eswitch callbacks and related code from leftover.c to
file dev.c. No functional change in this patch.
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Move devlink dev reload callback and related code from leftover.c to
file dev.c. No functional change in this patch.
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Move devlink dev get and dump callbacks and related dev code to new file
dev.c. This file shall include all callbacks that are specific on
devlink dev object.
No functional change in this patch.
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Now that commit 028fb19c6b ("netlink: provide an ability to set
default extack message") provides a weak function that doesn't override
an existing extack message provided by the driver, it makes sense to use
it also for LAG and HSR offloading, not just for bridge offloading.
Also consistently put the message string on a separate line, to reduce
line length from 92 to 84 characters.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20230202140354.3158129-1-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Since commit ff9fb72bc0 ("debugfs: return error values,
not NULL") changed return value of debugfs_rename() in
error cases from %NULL to %ERR_PTR(-ERROR), we should
also check error values instead of NULL.
Fixes: ff9fb72bc0 ("debugfs: return error values, not NULL")
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Acked-by: Jay Vosburgh <jay.vosburgh@canonical.com>
Link: https://lore.kernel.org/r/20230202093256.32458-1-zhengqi.arch@bytedance.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This fix was nacked by Philip, for reasons identified in the email linked
below.
Link: https://lkml.kernel.org/r/68f15d67-8945-2728-1f17-5b53a80ec52d@squashfs.org.uk
Fixes: 72e544b1b2 ("squashfs: harden sanity check in squashfs_read_xattr_id_table")
Cc: Alexey Khoroshilov <khoroshilov@ispras.ru>
Cc: Fedor Pchelkin <pchelkin@ispras.ru>
Cc: Phillip Lougher <phillip@squashfs.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
The copy_mc_to_kernel() will return 0 if it executed successfully. Then
the return value should be set to the length it copied.
[akpm@linux-foundation.org: don't mess up `ret', per Matthew]
Link: https://lkml.kernel.org/r/1675341227-14-1-git-send-email-ruansy.fnst@fujitsu.com
Fixes: d984648e42 ("fsdax,xfs: port unshare to fsdax")
Signed-off-by: Shiyang Ruan <ruansy.fnst@fujitsu.com>
Cc: Darrick J. Wong <djwong@kernel.org>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
If we call folio_isolate_lru() successfully, we will get return value 0.
We need to add this folio to the movable_pages_list.
Link: https://lkml.kernel.org/r/20230131063206.28820-1-Kuan-Ying.Lee@mediatek.com
Fixes: 67e139b02d ("mm/gup.c: refactor check_and_migrate_movable_pages()")
Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
Reviewed-by: Alistair Popple <apopple@nvidia.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Andrew Yang <andrew.yang@mediatek.com>
Cc: Chinwen Chang <chinwen.chang@mediatek.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Commit e4a0d3e720 ("aio: Make it possible to remap aio ring") introduced
a null-deref if mremap is called on an old aio mapping after fork as
mm->ioctx_table will be set to NULL.
[jmoyer@redhat.com: fix 80 column issue]
Link: https://lkml.kernel.org/r/x49sffq4nvg.fsf@segfault.boston.devel.redhat.com
Fixes: e4a0d3e720 ("aio: Make it possible to remap aio ring")
Signed-off-by: Seth Jenkins <sethjenkins@google.com>
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Benjamin LaHaise <bcrl@kvack.org>
Cc: Jann Horn <jannh@google.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
After x86 enabled support for KMSAN, it has become possible to have larger
'struct page' than was expected when commit 5470dea49f ("mm: use
mm_zero_struct_page from SPARC on all 64b architectures") was merged:
include/linux/mm.h:156:10: warning: no case matching constant switch condition '96'
switch (sizeof(struct page)) {
Extend the maximum accordingly.
Link: https://lkml.kernel.org/r/20230130130739.563628-1-arnd@kernel.org
Fixes: 5470dea49f ("mm: use mm_zero_struct_page from SPARC on all 64b architectures")
Fixes: 4ca8cc8d1b ("x86: kmsan: enable KMSAN builds for x86")
Fixes: f80be4571b ("kmsan: add KMSAN runtime core")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: Alexander Duyck <alexander.h.duyck@linux.intel.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Alex Sierra <alex.sierra@amd.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Liam R. Howlett <Liam.Howlett@Oracle.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Naoya Horiguchi <naoya.horiguchi@nec.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Following a recent refactor of the driver to properly drop unused
device nodes, the driver expects trackpad channel touch thresholds
and ATI base values to be specified under single trackpad channel
child nodes.
This enhancement moves both properties to scalar values as opposed
to arrays, making their types consistent across bindings.
Fixes: a8f1f0dc86 ("dt-bindings: input: Add bindings for Azoteq IQS626A")
Signed-off-by: Jeff LaBundy <jeff@labundy.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/Y9RQcddToBr1rrnJ@nixie71
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Each call to device/fwnode_get_named_child_node() must be matched
with a call to fwnode_handle_put() once the corresponding node is
no longer in use. This ensures a reference count remains balanced
in the case of dynamic device tree support.
Currently, the driver never calls fwnode_handle_put(); this patch
adds the missing calls. Because fwnode_handle_put() does not take
a const *fwnode_handle, the const qualifier is removed across all
corresponding *fwnode_handle instances.
As part of this change, trackpad channel touch thresholds and ATI
base values are now specified under single trackpad channel child
nodes. This enhancement moves both properties to scalar values as
opposed to arrays, making their types consistent across bindings.
Fixes: f1d2809de9 ("Input: Add support for Azoteq IQS626A")
Signed-off-by: Jeff LaBundy <jeff@labundy.com>
Link: https://lore.kernel.org/r/Y9RQVe/V1Hnw1oly@nixie71
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Rahul Rameshbabu