Thomas Gleixner 5c4d9eefd3 genirq/affinity: Make affinity setting if activated opt-in ... commit f0c7baca18 upstream. John reported that on a RK3288 system the perf per CPU interrupts are all affine to CPU0 and provided the analysis: "It looks like what happens is that because the interrupts are not per-CPU in the hardware, armpmu_request_irq() calls irq_force_affinity() while the interrupt is deactivated and then request_irq() with IRQF_PERCPU | IRQF_NOBALANCING. Now when irq_startup() runs with IRQ_STARTUP_NORMAL, it calls irq_setup_affinity() which returns early because IRQF_PERCPU and IRQF_NOBALANCING are set, leaving the interrupt on its original CPU." This was broken by the recent commit which blocked interrupt affinity setting in hardware before activation of the interrupt. While this works in general, it does not work for this particular case. As contrary to the initial analysis not all interrupt chip drivers implement an activate callback, the safe cure is to make the deferred interrupt affinity setting at activation time opt-in. Implement the necessary core logic and make the two irqchip implementations for which this is required opt-in. In hindsight this would have been the right thing to do, but ... Fixes: baedb87d1b ("genirq/affinity: Handle affinity setting on inactive interrupts correctly") Reported-by: John Keeping <john@metanate.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Marc Zyngier <maz@kernel.org> Acked-by: Marc Zyngier <maz@kernel.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/87blk4tzgm.fsf@nanos.tec.linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-08-21 11:05:28 +02:00
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acpi	x86: ACPI: fix CPU hotplug deadlock	2020-04-23 10:30:20 +02:00
asm-generic	include/asm-generic/vmlinux.lds.h: align ro_after_init	2020-08-19 08:15:06 +02:00
clocksource
crypto	crypto: af_alg - fix use-after-free in af_alg_accept() due to bh_lock_sock()	2020-07-09 09:37:10 +02:00
drm
dt-bindings
keys	KEYS: Don't write out to userspace while holding key semaphore	2020-04-23 10:30:24 +02:00
kvm
linux	genirq/affinity: Make affinity setting if activated opt-in	2020-08-21 11:05:28 +02:00
math-emu
media	media: v4l2-device.h: Explicitly compare grp{id,mask} to zero in v4l2_device macros	2020-02-24 08:34:41 +01:00
memory
misc
net	net: refactor bind_bucket fastreuse into helper	2020-08-19 08:15:03 +02:00
pcmcia
ras
rdma	RDMA/core: Fix double destruction of uobject	2020-06-03 08:19:43 +02:00
scsi	scsi: Revert "target: iscsi: Wait for all commands to finish before freeing a session"	2020-02-28 16:38:58 +01:00
soc
sound	ASoC: rt5670: Add new gpio1_is_ext_spk_en quirk and enable it on the Lenovo Miix 2 10	2020-07-29 10:16:58 +02:00
target	scsi: target: fix hang when multiple threads try to destroy the same iscsi session	2020-04-21 09:03:11 +02:00
trace	rxrpc: Fix trace string	2020-07-22 09:32:13 +02:00
uapi	wireless: Use offsetof instead of custom macro.	2020-08-05 10:06:01 +02:00
video
xen