Instead of requesting interrupt normally and immediately disabling it
with call to disable_irq() use IRQF_NOAUTOEN to keep it disabled until
it is needed. This avoids a tiny window when interrupt is enabled but
not needed.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Guard notation simplifies code.
Also use list_first_entry() instead of list_entry() to emphasize intent.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Guard notation simplifies code.
Also stop trying to check if input device is opened/in use in the
interrupt handler - the interrupt is disabled when device is closed or
suspended.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Using guard notation makes the code more compact and error handling
more robust by ensuring that locks are released in all code paths
when control leaves critical section.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Use __free(fwnode_handle) cleanup facility to ensure that references to
acquired fwnodes are dropped at appropriate times automatically.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Do not define or use iqs5xx_ihex_rec structure: the original code was
using just a couple of fields in it and instead used it to calculate
offset to record data. The data field was actually reserving space for
checksum.
Instead iterate through fields and advance pointer explicitly.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Guard notation simplifies code.
Note that callers of exc3000_vendor_data_request() always expect
response, so it was adjusted to always wait for it.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Guard notation simplifies code.
Also fix the touchscreen not being marked as suspended when noone has
opened/is using it.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Document FocalTech FT3519 support by adding the compatible. It's 10
point touchscreen, which is compatible with FT3518
Signed-off-by: Bhushan Shah <bhushan.shah@machinesoul.in>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260314-edt-ft3519-v3-1-5ee91b408ed6@machinesoul.in
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Merge tag 'v7.0-rc5' into next
Sync up with mainline to pull in a fix for smb compilation error.
I2C devices with associated pinctrl states (DPAUX I2C controllers)
will change pinctrl state during runtime PM. This requires taking
a mutex, so these devices cannot be marked as IRQ safe.
Add PINCTRL as dependency to avoid build errors.
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Reported-by: Russell King <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/all/E1vsNBv-00000009nfA-27ZK@rmk-PC.armlinux.org.uk/
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Merge tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
Pull bpf fixes from Alexei Starovoitov:
- Fix how linked registers track zero extension of subregisters (Daniel
Borkmann)
- Fix unsound scalar fork for OR instructions (Daniel Wade)
- Fix exception exit lock check for subprogs (Ihor Solodrai)
- Fix undefined behavior in interpreter for SDIV/SMOD instructions
(Jenny Guanni Qu)
- Release module's BTF when module is unloaded (Kumar Kartikeya
Dwivedi)
- Fix constant blinding for PROBE_MEM32 instructions (Sachin Kumar)
- Reset register ID for END instructions to prevent incorrect value
tracking (Yazhou Tang)
* tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
selftests/bpf: Add a test cases for sync_linked_regs regarding zext propagation
bpf: Fix sync_linked_regs regarding BPF_ADD_CONST32 zext propagation
selftests/bpf: Add tests for maybe_fork_scalars() OR vs AND handling
bpf: Fix unsound scalar forking in maybe_fork_scalars() for BPF_OR
selftests/bpf: Add tests for sdiv32/smod32 with INT_MIN dividend
bpf: Fix undefined behavior in interpreter sdiv/smod for INT_MIN
selftests/bpf: Add tests for bpf_throw lock leak from subprogs
bpf: Fix exception exit lock checking for subprogs
bpf: Release module BTF IDR before module unload
selftests/bpf: Fix pkg-config call on static builds
bpf: Fix constant blinding for PROBE_MEM32 stores
selftests/bpf: Add test for BPF_END register ID reset
bpf: Reset register ID for BPF_END value tracking
- Revert "tracing: Remove pid in task_rename tracing output"
A change was made to remove the pid field from the task_rename event
because it was thought that it was always done for the current task and
recording the pid would be redundant. This turned out to be incorrect and
there are a few corner case where this is not true and caused some
regressions in tooling.
- Fix the reading from user space for migration
The reading of user space uses a seq lock type of logic where it uses a
per-cpu temporary buffer and disables migration, then enables preemption,
does the copy from user space, disables preemption, enables migration and
checks if there was any schedule switches while preemption was enabled. If
there was a context switch, then it is considered that the per-cpu buffer
could be corrupted and it tries again. There's a protection check that
tests if it takes a hundred tries, it issues a warning and exits out to
prevent a live lock.
This was triggered because the task was selected by the load balancer to
be migrated to another CPU, every time preemption is enabled the migration
task would schedule in try to migrate the task but can't because migration
is disabled and let it run again. This caused the scheduler to schedule out
the task every time it enabled preemption and made the loop never exit
(until the 100 iteration test triggered).
Fix this by enabling and disabling preemption and keeping migration
enabled if the reading from user space needs to be done again. This will
let the migration thread migrate the task and the copy from user space
will likely pass on the next iteration.
- Fix trace_marker copy option freeing
The "copy_trace_marker" option allows a tracing instance to get a copy of
a write to the trace_marker file of the top level instance. This is
managed by a link list protected by RCU. When an instance is removed, a
check is made if the option is set, and if so synchronized_rcu() is
called. The problem is that an iteration is made to reset all the flags to
what they were when the instance was created (to perform clean ups) was
done before the check of the copy_trace_marker option and that option was
cleared, so the synchronize_rcu() was never called.
Move the clearing of all the flags after the check of copy_trace_marker to
do synchronize_rcu() so that the option is still set if it was before and
the synchronization is performed.
- Fix entries setting when validating the persistent ring buffer
When validating the persistent ring buffer on boot up, the number of
events per sub-buffer is added to the sub-buffer meta page. The validator
was updating cpu_buffer->head_page (the first sub-buffer of the per-cpu
buffer) and not the "head_page" variable that was iterating the
sub-buffers. This was causing the first sub-buffer to be assigned the
entries for each sub-buffer and not the sub-buffer that was supposed to be
updated.
- Use "hash" value to update the direct callers
When updating the ftrace direct callers, it assigned a temporary callback
to all the callback functions of the ftrace ops and not just the
functions represented by the passed in hash. This causes an unnecessary
slow down of the functions of the ftrace_ops that is not being modified.
Only update the functions that are going to be modified to call the
ftrace loop function so that the update can be made on those functions.
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Merge tag 'trace-v7.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull tracing fixes from Steven Rostedt:
- Revert "tracing: Remove pid in task_rename tracing output"
A change was made to remove the pid field from the task_rename event
because it was thought that it was always done for the current task
and recording the pid would be redundant. This turned out to be
incorrect and there are a few corner case where this is not true and
caused some regressions in tooling.
- Fix the reading from user space for migration
The reading of user space uses a seq lock type of logic where it uses
a per-cpu temporary buffer and disables migration, then enables
preemption, does the copy from user space, disables preemption,
enables migration and checks if there was any schedule switches while
preemption was enabled. If there was a context switch, then it is
considered that the per-cpu buffer could be corrupted and it tries
again. There's a protection check that tests if it takes a hundred
tries, it issues a warning and exits out to prevent a live lock.
This was triggered because the task was selected by the load balancer
to be migrated to another CPU, every time preemption is enabled the
migration task would schedule in try to migrate the task but can't
because migration is disabled and let it run again. This caused the
scheduler to schedule out the task every time it enabled preemption
and made the loop never exit (until the 100 iteration test
triggered).
Fix this by enabling and disabling preemption and keeping migration
enabled if the reading from user space needs to be done again. This
will let the migration thread migrate the task and the copy from user
space will likely pass on the next iteration.
- Fix trace_marker copy option freeing
The "copy_trace_marker" option allows a tracing instance to get a
copy of a write to the trace_marker file of the top level instance.
This is managed by a link list protected by RCU. When an instance is
removed, a check is made if the option is set, and if so
synchronized_rcu() is called.
The problem is that an iteration is made to reset all the flags to
what they were when the instance was created (to perform clean ups)
was done before the check of the copy_trace_marker option and that
option was cleared, so the synchronize_rcu() was never called.
Move the clearing of all the flags after the check of
copy_trace_marker to do synchronize_rcu() so that the option is still
set if it was before and the synchronization is performed.
- Fix entries setting when validating the persistent ring buffer
When validating the persistent ring buffer on boot up, the number of
events per sub-buffer is added to the sub-buffer meta page. The
validator was updating cpu_buffer->head_page (the first sub-buffer of
the per-cpu buffer) and not the "head_page" variable that was
iterating the sub-buffers. This was causing the first sub-buffer to
be assigned the entries for each sub-buffer and not the sub-buffer
that was supposed to be updated.
- Use "hash" value to update the direct callers
When updating the ftrace direct callers, it assigned a temporary
callback to all the callback functions of the ftrace ops and not just
the functions represented by the passed in hash. This causes an
unnecessary slow down of the functions of the ftrace_ops that is not
being modified. Only update the functions that are going to be
modified to call the ftrace loop function so that the update can be
made on those functions.
* tag 'trace-v7.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
ftrace: Use hash argument for tmp_ops in update_ftrace_direct_mod
ring-buffer: Fix to update per-subbuf entries of persistent ring buffer
tracing: Fix trace_marker copy link list updates
tracing: Fix failure to read user space from system call trace events
tracing: Revert "tracing: Remove pid in task_rename tracing output"
pxa: fix broken I2C communication on Armada 3700 with recovery
fsi: fix device_node reference leak in probe
cp2615: fix NULL-deref when serial string is missing
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Merge tag 'i2c-for-7.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c fixes from Wolfram Sang:
- fix broken I2C communication on Armada 3700 with recovery
- fix device_node reference leak in probe (fsi)
- fix NULL-deref when serial string is missing (cp2615)
* tag 'i2c-for-7.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: pxa: defer reset on Armada 3700 when recovery is used
i2c: fsi: Fix a potential leak in fsi_i2c_probe()
i2c: cp2615: fix serial string NULL-deref at probe
- Improve Qemu MCE-injection behavior by only using
AMD SMCA MSRs if the feature bit is set.
- Fix the relative path of gettimeofday.c inclusion
in vclock_gettime.c
- Fix a boot crash on UV clusters when a socket is
marked as 'deconfigured' which are mapped to the
SOCK_EMPTY (0xffff [short -1]) node ID by the UV firmware,
while Linux APIs expect NUMA_NO_NODE (0xffffffff [int -1]).
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'x86-urgent-2026-03-22' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
- Improve Qemu MCE-injection behavior by only using AMD SMCA MSRs if
the feature bit is set
- Fix the relative path of gettimeofday.c inclusion in vclock_gettime.c
- Fix a boot crash on UV clusters when a socket is marked as
'deconfigured' which are mapped to the SOCK_EMPTY node ID by
the UV firmware, while Linux APIs expect NUMA_NO_NODE.
The difference being (0xffff [unsigned short ~0]) vs [int -1]
* tag 'x86-urgent-2026-03-22' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/platform/uv: Handle deconfigured sockets
x86/entry/vdso: Fix path of included gettimeofday.c
x86/mce/amd: Check SMCA feature bit before accessing SMCA MSRs
- Fix a PMU driver crash on AMD EPYC systems, caused by
a race condition in x86_pmu_enable()
- Fix a possible counter-initialization bug in x86_pmu_enable()
- Fix a counter inheritance bug in inherit_event() and
__perf_event_read()
- Fix an Intel PMU driver branch constraints handling bug
found by UBSAN
- Fix the Intel PMU driver's new Off-Module Response (OMR)
support code for Diamond Rapids / Nova lake, to fix a snoop
information parsing bug
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'perf-urgent-2026-03-22' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
- Fix a PMU driver crash on AMD EPYC systems, caused by
a race condition in x86_pmu_enable()
- Fix a possible counter-initialization bug in x86_pmu_enable()
- Fix a counter inheritance bug in inherit_event() and
__perf_event_read()
- Fix an Intel PMU driver branch constraints handling bug
found by UBSAN
- Fix the Intel PMU driver's new Off-Module Response (OMR)
support code for Diamond Rapids / Nova lake, to fix a snoop
information parsing bug
* tag 'perf-urgent-2026-03-22' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/intel: Fix OMR snoop information parsing issues
perf/x86/intel: Add missing branch counters constraint apply
perf: Make sure to use pmu_ctx->pmu for groups
x86/perf: Make sure to program the counter value for stopped events on migration
perf/x86: Move event pointer setup earlier in x86_pmu_enable()
