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[v3,12/24] KVM: x86: push usage of slots_lock down

Message ID 20170407085041.5257-13-david@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

David Hildenbrand April 7, 2017, 8:50 a.m. UTC 
Let's just move it to the place where it is actually needed.

Signed-off-by: David Hildenbrand <david@redhat.com>
---
 arch/x86/kvm/i8259.c  | 2 ++
 arch/x86/kvm/ioapic.c | 2 ++
 arch/x86/kvm/x86.c    | 4 ----
 3 files changed, 4 insertions(+), 4 deletions(-)
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Patch

diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c
index af97c5a..2da2b42 100644
--- a/arch/x86/kvm/i8259.c
+++ b/arch/x86/kvm/i8259.c
@@ -660,9 +660,11 @@  void kvm_pic_destroy(struct kvm *kvm)
 	if (!vpic)
 		return;
 
+	mutex_lock(&kvm->slots_lock);
 	kvm_io_bus_unregister_dev(vpic->kvm, KVM_PIO_BUS, &vpic->dev_master);
 	kvm_io_bus_unregister_dev(vpic->kvm, KVM_PIO_BUS, &vpic->dev_slave);
 	kvm_io_bus_unregister_dev(vpic->kvm, KVM_PIO_BUS, &vpic->dev_eclr);
+	mutex_unlock(&kvm->slots_lock);
 
 	kvm->arch.vpic = NULL;
 	kfree(vpic);
diff --git a/arch/x86/kvm/ioapic.c b/arch/x86/kvm/ioapic.c
index 10941a6..6e1d8cb 100644
--- a/arch/x86/kvm/ioapic.c
+++ b/arch/x86/kvm/ioapic.c
@@ -637,7 +637,9 @@  void kvm_ioapic_destroy(struct kvm *kvm)
 		return;
 
 	cancel_delayed_work_sync(&ioapic->eoi_inject);
+	mutex_lock(&kvm->slots_lock);
 	kvm_io_bus_unregister_dev(kvm, KVM_MMIO_BUS, &ioapic->dev);
+	mutex_unlock(&kvm->slots_lock);
 	kvm->arch.vioapic = NULL;
 	kfree(ioapic);
 }
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 8424481..889b7f9 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4021,9 +4021,7 @@  long kvm_arch_vm_ioctl(struct file *filp,
 
 		r = kvm_ioapic_init(kvm);
 		if (r) {
-			mutex_lock(&kvm->slots_lock);
 			kvm_pic_destroy(kvm);
-			mutex_unlock(&kvm->slots_lock);
 			goto create_irqchip_unlock;
 		}
 
@@ -4033,10 +4031,8 @@  long kvm_arch_vm_ioctl(struct file *filp,
 			kvm->arch.irqchip_mode = KVM_IRQCHIP_NONE;
 			/* Pairs with smp_rmb() when reading irqchip_mode */
 			smp_wmb();
-			mutex_lock(&kvm->slots_lock);
 			kvm_ioapic_destroy(kvm);
 			kvm_pic_destroy(kvm);
-			mutex_unlock(&kvm->slots_lock);
 			goto create_irqchip_unlock;
 		}
 		/* Write kvm->irq_routing before enabling irqchip_in_kernel. */