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Thomas Gleixner d209a699a0 genirq: Add chip flag to force mask on suspend ... On suspend we disable all interrupts in the core code, but this does not mask the interrupt line in the default implementation as we use a lazy disable approach. That means we mark the interrupt disabled, but leave the hardware unmasked. That's an optimization because we avoid the hardware access for the common case where no interrupt happens after we marked it disabled. If an interrupt happens, then the interrupt flow handler masks the line at the hardware level and marks it pending. Suspend makes use of this delayed disable as it "disables" all interrupts when preparing the suspend transition. Right before the system goes into hardware suspend state it checks whether one of the interrupts which is marked as a wakeup interrupt came in after disabling it. Most interrupt chips have a separate register which selects the interrupts which can wake up the system from suspend, so we don't have to mask any on the non wakeup interrupts. But now we have to deal with brilliant designed hardware which lacks such a wakeup configuration facility. For such hardware it's necessary to mask all non wakeup interrupts before going into suspend in order to avoid the wakeup from random interrupts. Rather than working around this in the affected interrupt chip implementations we can solve this elegant in the core code itself. Add a flag IRQCHIP_MASK_ON_SUSPEND which can be set by the irq chip implementation to indicate, that the interrupts which are not selected as wakeup sources must be masked in the suspend path. Mask them in the loop which checks the wakeup interrupts pending flag. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org> LKML-Reference: <alpine.LFD.2.00.1103112112310.2787@localhost6.localdomain6>		14 years ago
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Kconfig	genirq: Add comments to Kconfig switches	14 years ago
Makefile	…
autoprobe.c	genirq: Remove real old transition functions	14 years ago
chip.c	genirq: Fixup fasteoi handler for oneshot mode	14 years ago
compat.h	genirq: Move IRQ_AFFINITY_SET to core	14 years ago
debug.h	genirq: Move debug code to separate header	14 years ago
devres.c	…
dummychip.c	…
handle.c	genirq: Prepare the handling of shared oneshot interrupts	14 years ago
internals.h	genirq: Provide forced interrupt threading	14 years ago
irqdesc.c	genirq: Use IRQ_BITMAP_BITS as search size in irq_alloc_descs()	14 years ago
manage.c	genirq: Provide forced interrupt threading	14 years ago
migration.c	genirq: Implement irq_data based move_*_irq() versions	14 years ago
pm.c	genirq: Add chip flag to force mask on suspend	14 years ago
proc.c	genirq: Reuse existing can set affinty check	14 years ago
resend.c	genirq: Mirror irq trigger type bits in irq_data.state	14 years ago
settings.h	genirq: Remove desc->status when GENERIC_HARDIRQS_NO_COMPAT=y	14 years ago
spurious.c	genirq: Wrap the remaning IRQ_* flags	14 years ago