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LoongArch: KVM: Add missing slots_lock for device register/unregister

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kvm_io_bus_register_dev() and kvm_io_bus_unregister_dev() should be
called under kvm->slots_lock. The unregister calls in ipi.c, eiointc.c
and pch_pic.c were also missing this protection. Add it to match the
register side.

Cc: stable@vger.kernel.org
Reviewed-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Zeng Chi <zengchi@kylinos.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Zeng Chi 2026-06-11 20:46:44 +08:00 committed by Huacai Chen
parent 3474037904
commit aeded601d6
3 changed files with 10 additions and 0 deletions
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6
arch/loongarch/kvm/intc/eiointc.c
View File

@ -645,10 +645,14 @@ static int kvm_eiointc_create(struct kvm_device *dev, u32 type)
device = &s->device_vext;
kvm_iodevice_init(device, &kvm_eiointc_virt_ops);
mutex_lock(&kvm->slots_lock);
ret = kvm_io_bus_register_dev(kvm, KVM_IOCSR_BUS,
EIOINTC_VIRT_BASE, EIOINTC_VIRT_SIZE, device);
mutex_unlock(&kvm->slots_lock);
if (ret < 0) {
mutex_lock(&kvm->slots_lock);
kvm_io_bus_unregister_dev(kvm, KVM_IOCSR_BUS, &s->device);
mutex_unlock(&kvm->slots_lock);
kfree(s);
return ret;
}
@ -667,8 +671,10 @@ static void kvm_eiointc_destroy(struct kvm_device *dev)
kvm = dev->kvm;
eiointc = kvm->arch.eiointc;
mutex_lock(&kvm->slots_lock);
kvm_io_bus_unregister_dev(kvm, KVM_IOCSR_BUS, &eiointc->device);
kvm_io_bus_unregister_dev(kvm, KVM_IOCSR_BUS, &eiointc->device_vext);
mutex_unlock(&kvm->slots_lock);
kfree(eiointc);
kfree(dev);
}

2
arch/loongarch/kvm/intc/ipi.c
View File

@ -447,7 +447,9 @@ static void kvm_ipi_destroy(struct kvm_device *dev)
kvm = dev->kvm;
ipi = kvm->arch.ipi;
mutex_lock(&kvm->slots_lock);
kvm_io_bus_unregister_dev(kvm, KVM_IOCSR_BUS, &ipi->device);
mutex_unlock(&kvm->slots_lock);
kfree(ipi);
kfree(dev);
}

2
arch/loongarch/kvm/intc/pch_pic.c
View File

@ -481,7 +481,9 @@ static void kvm_pch_pic_destroy(struct kvm_device *dev)
kvm = dev->kvm;
s = kvm->arch.pch_pic;
/* unregister pch pic device and free it's memory */
mutex_lock(&kvm->slots_lock);
kvm_io_bus_unregister_dev(kvm, KVM_MMIO_BUS, &s->device);
mutex_unlock(&kvm->slots_lock);
kfree(s);
kfree(dev);
}