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KVM: arm/arm64: VGIC/ITS: Promote irq_lock() in update_affinity

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Apparently the development of update_affinity() overlapped with the
promotion of irq_lock to be _irqsave, so the patch didn't convert this
lock over. This will make lockdep complain.

Fix this by disabling IRQs around the lock.

Cc: [email protected]
Fixes: 08c9fd0421 ("KVM: arm/arm64: vITS: Add a helper to update the affinity of an LPI")
Reported-by: Jan Glauber <[email protected]>
Signed-off-by: Andre Przywara <[email protected]>
Acked-by: Christoffer Dall <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
This commit is contained in:
Andre Przywara 2018-05-11 15:20:13 +01:00 • committed by Paolo Bonzini
commit 9c4188762f
1 changed files with 3 additions and 2 deletions
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5
virt/kvm/arm/vgic/vgic-its.c
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@ -350,10 +350,11 @@ static int vgic_copy_lpi_list(struct kvm_vcpu *vcpu, u32 **intid_ptr)
static int update_affinity(struct vgic_irq *irq, struct kvm_vcpu *vcpu)
{
int ret = 0;
unsigned long flags;
spin_lock(&irq->irq_lock);
spin_lock_irqsave(&irq->irq_lock, flags);
irq->target_vcpu = vcpu;
spin_unlock(&irq->irq_lock);
spin_unlock_irqrestore(&irq->irq_lock, flags);
if (irq->hw) {
struct its_vlpi_map map;