AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/arch/x86/kernel/apic
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Keith Busch 1bdb897039 x86/apic: Handle zero vector gracefully in clear_vector_irq() 
If x86_vector_alloc_irq() fails x86_vector_free_irqs() is invoked to cleanup
the already allocated vectors. This subsequently calls clear_vector_irq().

The failed irq has no vector assigned, which triggers the BUG_ON(!vector) in
clear_vector_irq().

We cannot suppress the call to x86_vector_free_irqs() for the failed
interrupt, because the other data related to this irq must be cleaned up as
well. So calling clear_vector_irq() with vector == 0 is legitimate.

Remove the BUG_ON and return if vector is zero,

[ tglx: Massaged changelog ]

Fixes: b5dc8e6c21 "x86/irq: Use hierarchical irqdomain to manage CPU interrupt vectors"
Signed-off-by: Keith Busch <keith.busch@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-04-28 09:53:06 +02:00
..
apic_flat_64.c x86/apic: Deinline _flat_send_IPI_mask, save ~150 bytes 2016-03-08 12:26:41 +01:00
apic_noop.c x86/apic: Implement single IPI for apic_noop 2015-11-05 13:07:53 +01:00
apic_numachip.c x86/cpufeature: Replace the old static_cpu_has() with safe variant 2016-01-30 11:22:18 +01:00
apic.c Merge branch 'x86/cleanups' into x86/urgent 2016-03-17 09:44:57 +01:00
bigsmp_32.c x86/apic: Wire up single IPI for bigsmp_apic 2015-11-05 13:07:52 +01:00
htirq.c
hw_nmi.c
io_apic.c x86/irq: Call chip->irq_set_affinity in proper context 2016-01-15 13:43:58 +01:00
ipi.c x86/apic: Deinline __default_send_IPI_*, save ~200 bytes 2016-03-08 12:26:41 +01:00
Makefile kernel: add kcov code coverage 2016-03-22 15:36:02 -07:00
msi.c x86/irq: Export functions to allow MSI domains in modules 2015-12-20 12:40:49 +01:00
probe_32.c x86/apic: Use default send single IPI wrapper 2015-11-05 13:07:53 +01:00
probe_64.c
vector.c x86/apic: Handle zero vector gracefully in clear_vector_irq() 2016-04-28 09:53:06 +02:00
x2apic_cluster.c x86/apic: Implement single target IPI function for x2apic_cluster 2015-11-05 13:07:52 +01:00
x2apic_phys.c x86/apic: Implement single IPI for x2apic_phys 2015-11-05 13:07:53 +01:00
x2apic_uv_x.c x86/apic/uv: Fix the hotplug notifier 2016-03-19 13:40:08 +01:00