https://github.com/torvalds/linux
The set_irq_affinity() function has two issues: 1) It has no protection against selecting an offline cpu from the given mask. 2) It pointlessly restricts the affinity masks to have a single cpu set. This collides with the irq migration code of arm. irq affinity is set to core 3 core 3 goes offline migration code sets mask to cpu_online_mask and calls the irq_set_affinity() callback of the irq_chip which fails due to bit 0,1,2 set. So instead of doing silly for_each_cpu() loops just pick any bit of the mask which intersects with the online mask. Get rid of fiddling with the default_irq_affinity as well. [ Gregory: Fixed the access to the routing register ] Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@elte.hu> Link: http://lkml.kernel.org/r/20140304203101.088889302@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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irqchip: armanda: Sanitize set_irq_affinity()
File | Mode | Size |
---|---|---|
Documentation | ||
arch | ||
block | ||
crypto | ||
drivers | ||
firmware | ||
fs | ||
include | ||
init | ||
ipc | ||
kernel | ||
lib | ||
mm | ||
net | ||
samples | ||
scripts | ||
security | ||
sound | ||
tools | ||
usr | ||
virt | ||
.gitignore | -rw-r--r-- | 1.1 KB |
.mailmap | -rw-r--r-- | 4.4 KB |
COPYING | -rw-r--r-- | 18.3 KB |
CREDITS | -rw-r--r-- | 93.6 KB |
Kbuild | -rw-r--r-- | 2.5 KB |
Kconfig | -rw-r--r-- | 252 bytes |
MAINTAINERS | -rw-r--r-- | 271.4 KB |
Makefile | -rw-r--r-- | 50.5 KB |
README | -rw-r--r-- | 18.3 KB |
REPORTING-BUGS | -rw-r--r-- | 7.3 KB |
Computing file changes ...