linux.git/kernel/irq/pm.c, branch v7.1

syscore: Pass context data to callbacks

2025-11-14T09:01:52+00:00

Several drivers can benefit from registering per-instance data along
with the syscore operations. To achieve this, move the modifiable fields
out of the syscore_ops structure and into a separate struct syscore that
can be registered with the framework. Add a void * driver data field for
drivers to store contextual data that will be passed to the syscore ops.

Acked-by: Rafael J. Wysocki (Intel) 
Signed-off-by: Thierry Reding

genirq: Split up irq_pm_check_wakeup()

2025-07-22T12:30:42+00:00

Let the calling code check for the IRQD_WAKEUP_ARMED flag to prepare for a
live lock mitigation in the edge type handler.

No functional change.

Signed-off-by: Thomas Gleixner 
Tested-by: Liangyan 
Link: https://lore.kernel.org/all/20250718185312.012392426@linutronix.de

genirq/pm: Switch to lock guards

2025-05-07T07:08:11+00:00

Convert all lock/unlock pairs to guards and tidy up the code.

No functional change.

Signed-off-by: Thomas Gleixner 
Acked-by: Peter Zijlstra (Intel) 
Link: https://lore.kernel.org/all/20250429065420.251299112@linutronix.de

genirq/PM: Unexport {suspend,resume}_device_irqs()

2022-06-13T10:27:37+00:00

Ever since {suspend,resume}_device_irqs() were introduced in 2009
by commit 0a0c5168df27 ("PM: Introduce functions for suspending and
resuming device interrupts"), they've been exported even though there
are no module users and never will be:  The functions are solely called
by the PM core, which is always built-in.  Unexport them.

Signed-off-by: Lukas Wunner 
Signed-off-by: Thomas Gleixner 
Reviewed-by: Rafael J. Wysocki 
Link: https://lore.kernel.org/r/fad9b50609f9d9828ea14772dbd4d195713f1c4b.1654846687.git.lukas@wunner.de

genirq: Fix kernel-doc warnings in pm.c, msi.c and ipi.c

2021-08-11T12:33:35+00:00

Fix all kernel-doc warnings in these 3 files and do some simple editing
(capitalize acronyms, capitalize Linux).

kernel/irq/pm.c:235: warning: expecting prototype for irq_pm_syscore_ops(). Prototype was for irq_pm_syscore_resume() instead
kernel/irq/msi.c:530: warning: expecting prototype for __msi_domain_free_irqs(). Prototype was for msi_domain_free_irqs() instead
kernel/irq/msi.c:31: warning: No description found for return value of 'alloc_msi_entry'
kernel/irq/msi.c:103: warning: No description found for return value of 'msi_domain_set_affinity'
kernel/irq/msi.c:288: warning: No description found for return value of 'msi_create_irq_domain'
kernel/irq/msi.c:499: warning: No description found for return value of 'msi_domain_alloc_irqs'
kernel/irq/msi.c:545: warning: No description found for return value of 'msi_get_domain_info'
kernel/irq/ipi.c:264: warning: expecting prototype for ipi_send_mask(). Prototype was for __ipi_send_mask() instead
kernel/irq/ipi.c:25: warning: No description found for return value of 'irq_reserve_ipi'
kernel/irq/ipi.c:116: warning: No description found for return value of 'irq_destroy_ipi'
kernel/irq/ipi.c:163: warning: No description found for return value of 'ipi_get_hwirq'
kernel/irq/ipi.c:222: warning: No description found for return value of '__ipi_send_single'
kernel/irq/ipi.c:308: warning: No description found for return value of 'ipi_send_single'
kernel/irq/ipi.c:329: warning: No description found for return value of 'ipi_send_mask'

Signed-off-by: Randy Dunlap 
Signed-off-by: Thomas Gleixner 
Link: https://lore.kernel.org/r/20210810234835.12547-1-rdunlap@infradead.org

genirq/PM: Introduce IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND flag

2020-10-06T10:23:41+00:00

An interrupt that is disabled/masked but set for wakeup may still need to
be able to wake up the system from sleep states like "suspend to RAM".

To that effect, introduce the IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND flag.
If the irqchip have this flag set, the irq PM code will enable/unmask
the irqs that are marked for wakeup, but that are in a disabled state.

On resume, such irqs will be restored back to their disabled state.

Suggested-by: Thomas Gleixner 
Signed-off-by: Maulik Shah 
[maz: commit message fix-up]
Signed-off-by: Marc Zyngier 
Tested-by: Stephen Boyd 
Reviewed-by: Thomas Gleixner 
Reviewed-by: Douglas Anderson 
Link: https://lore.kernel.org/r/1601267524-20199-4-git-send-email-mkshah@codeaurora.org

genirq/PM: Always unlock IRQ descriptor in rearm_wake_irq()

2020-08-12T09:04:05+00:00

rearm_wake_irq() does not unlock the irq descriptor if the interrupt
is not suspended or if wakeup is not enabled on it.

Restucture the exit conditions so the unlock is always ensured.

Fixes: 3a79bc63d9075 ("PCI: irq: Introduce rearm_wake_irq()")
Signed-off-by: Guenter Roeck 
Signed-off-by: Thomas Gleixner 
Acked-by: Rafael J. Wysocki 
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200811180001.80203-1-linux@roeck-us.net

PCI: irq: Introduce rearm_wake_irq()

2019-07-23T07:37:51+00:00

Introduce a new function, rearm_wake_irq(), allowing a wakeup IRQ
to be armed for systen wakeup detection again without running any
action handlers associated with it after it has been armed for
wakeup detection and triggered.

That is useful for IRQs, like ACPI SCI, that may deliver wakeup
as well as non-wakeup interrupts when armed for systen wakeup
detection.  In those cases, it may be possible to determine whether
or not the delivered interrupt is a systen wakeup one without
running the entire action handler (or handlers, if the IRQ is
shared) for the IRQ, and if the interrupt turns out to be a
non-wakeup one, the IRQ can be rearmed with the help of the
new function.

Signed-off-by: Rafael J. Wysocki 
Acked-by: Thomas Gleixner

genirq: Add missing SPDX identifiers

2018-03-20T13:23:28+00:00

Add SPDX identifiers to files

 - which contain an explicit license boiler plate or reference

 - which do not contain a license reference and were not updated in the
   initial SPDX conversion because the license was deduced by the scanners
   via EXPORT_SYMBOL_GPL as GPL2.0 only.

[ tglx: Moved adding identifiers from the patch which removes the
  	references/boilerplate ]

Signed-off-by: Thomas Gleixner 
Cc: Kate Stewart 
Cc: Greg Kroah-Hartman 
Cc: Philippe Ombredanne 
Link: https://lkml.kernel.org/r/20180314212030.668321222@linutronix.de

genirq: Cleanup top of file comments

2018-03-20T13:23:27+00:00

Remove pointless references to the file name itself and condense the
information so it wastes less space.

Signed-off-by: Thomas Gleixner 
Acked-by: Marc Zyngier 
Cc: Kate Stewart 
Cc: Greg Kroah-Hartman 
Cc: Philippe Ombredanne 
Link: https://lkml.kernel.org/r/20180314212030.412095827@linutronix.de