diff options
| author | Andre Przywara <andre.przywara@arm.com> | 2018-05-11 15:20:13 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-05-15 13:36:44 +0200 |
| commit | 9c4188762f7fee032abf8451fd9865a9abfc5516 (patch) | |
| tree | 9410dcbf4b080aed3e6abba8d4e209520092f869 /virt | |
| parent | 388d4359680b56dba82fe2ffca05871e9fd2b73e (diff) | |
| download | lwn-9c4188762f7fee032abf8451fd9865a9abfc5516.tar.gz lwn-9c4188762f7fee032abf8451fd9865a9abfc5516.zip | |
KVM: arm/arm64: VGIC/ITS: Promote irq_lock() in update_affinity
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: stable@vger.kernel.org
Fixes: 08c9fd042117 ("KVM: arm/arm64: vITS: Add a helper to update the affinity of an LPI")
Reported-by: Jan Glauber <jan.glauber@caviumnetworks.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Christoffer Dall <christoffer.dall@arm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/arm/vgic/vgic-its.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c index 41abf92f2699..51a80b600632 100644 --- a/virt/kvm/arm/vgic/vgic-its.c +++ b/virt/kvm/arm/vgic/vgic-its.c @@ -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; |