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| author | Sheng Yang <sheng@linux.intel.com> | 2009-12-15 10:28:07 +0800 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2009-12-27 13:36:31 -0200 |
| commit | fae3a3536a6fecedebd49fa847f810e599bfb132 (patch) | |
| tree | 18b555c3f6bcc6735fd7a90db2c398a35e29c84e /arch/x86 | |
| parent | fb341f572d26e0786167cd96b90cc4febed830cf (diff) | |
| download | talos-op-linux-fae3a3536a6fecedebd49fa847f810e599bfb132.tar.gz talos-op-linux-fae3a3536a6fecedebd49fa847f810e599bfb132.zip | |
KVM: Fix possible circular locking in kvm_vm_ioctl_assign_device()
One possible order is:
KVM_CREATE_IRQCHIP ioctl(took kvm->lock) -> kvm_iobus_register_dev() ->
down_write(kvm->slots_lock).
The other one is in kvm_vm_ioctl_assign_device(), which take kvm->slots_lock
first, then kvm->lock.
Update the comment of lock order as well.
Observe it due to kernel locking debug warnings.
Cc: stable@kernel.org
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86')
0 files changed, 0 insertions, 0 deletions
