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| author | Michael S. Tsirkin <mst@redhat.com> | 2009-07-05 21:27:58 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2009-09-10 08:33:10 +0300 |
| commit | 07fb8bb29f5269f30afa6f1b3d941406677f6ad2 (patch) | |
| tree | e18ff9ca00dfb917f049cd349249d7bab71cae3b /virt/kvm/irq_comm.c | |
| parent | f7c6d140032ae7e80df36d350c6edc41f92b2f94 (diff) | |
| download | lwn-07fb8bb29f5269f30afa6f1b3d941406677f6ad2.tar.gz lwn-07fb8bb29f5269f30afa6f1b3d941406677f6ad2.zip | |
KVM: ignore msi request if !level
Irqfd sets level for interrupt to 1 and then to 0.
For MSI, check level so that a single message is sent.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'virt/kvm/irq_comm.c')
| -rw-r--r-- | virt/kvm/irq_comm.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c index 56e696104d43..a9d7fd1f1d6a 100644 --- a/virt/kvm/irq_comm.c +++ b/virt/kvm/irq_comm.c @@ -139,7 +139,9 @@ int kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level) else clear_bit(irq_source_id, irq_state); sig_level = !!(*irq_state); - } else /* Deal with MSI/MSI-X */ + } else if (!level) + return ret; + else /* Deal with MSI/MSI-X */ sig_level = 1; /* Not possible to detect if the guest uses the PIC or the |