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authorAnton Blanchard <anton@samba.org>2010-05-10 16:27:38 +0000
committerGreg Kroah-Hartman <gregkh@suse.de>2011-03-21 12:45:32 -0700
commitc006ef62a4609974e184814c6455cb53603a93ff (patch)
treee8c153791f80b7754edfaea7c6d05e2226233208 /arch
parentefa2edb38d914d449f4f574ac3003637631484d2 (diff)
powerpc/kdump: Use chip->shutdown to disable IRQs
commit 5d7a87217de48b234b3c8ff8a73059947d822e07 upstream. I saw this in a kdump kernel: IOMMU table initialized, virtual merging enabled Interrupt 155954 (real) is invalid, disabling it. Interrupt 155953 (real) is invalid, disabling it. ie we took some spurious interrupts. default_machine_crash_shutdown tries to disable all interrupt sources but uses chip->disable which maps to the default action of: static void default_disable(unsigned int irq) { } If we use chip->shutdown, then we actually mask the IRQ: static void default_shutdown(unsigned int irq) { struct irq_desc *desc = irq_to_desc(irq); desc->chip->mask(irq); desc->status |= IRQ_MASKED; } Not sure why we don't implement a ->disable action for xics.c, or why default_disable doesn't mask the interrupt. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Kamalesh babulal <kamalesh@linux.vnet.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/kernel/crash.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c
index fbe3c1c93bd6..038437621de8 100644
--- a/arch/powerpc/kernel/crash.c
+++ b/arch/powerpc/kernel/crash.c
@@ -381,7 +381,7 @@ void default_machine_crash_shutdown(struct pt_regs *regs)
desc->chip->eoi(i);
if (!(desc->status & IRQ_DISABLED))
- desc->chip->disable(i);
+ desc->chip->shutdown(i);
}
/*