diff options
| author | Cornelia Huck <cornelia.huck@de.ibm.com> | 2014-05-28 14:15:57 +0200 |
|---|---|---|
| committer | Cornelia Huck <cornelia.huck@de.ibm.com> | 2014-06-10 09:50:26 +0200 |
| commit | 08da527fd07cf01dc29ca60a144fbdd60b0fb7c0 (patch) | |
| tree | 342b82fbb14f85580a6d7a835d33738ba12ddbfd /hw/intc | |
| parent | f068d320def7fd83bf0fcdca37b305f1c2ac5413 (diff) | |
s390x/kvm: make flic play well with old kernels
If we run with an old kernel that does not support KVM_CAP_IRQ_ROUTING,
we don't have to do anything in the ->register_io_adapter and
->io_adapter_map callbacks and therefore should return 0 instead of
-ENOSYS (just as the non-kvm flic does).
This fixes using adapter interrupts when running under an older kernel,
which broke with "s390x: add I/O adapter registration".
Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'hw/intc')
| -rw-r--r-- | hw/intc/s390_flic_kvm.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/hw/intc/s390_flic_kvm.c b/hw/intc/s390_flic_kvm.c index 46c9e612d1..a734094292 100644 --- a/hw/intc/s390_flic_kvm.c +++ b/hw/intc/s390_flic_kvm.c @@ -170,7 +170,8 @@ static int kvm_s390_register_io_adapter(S390FLICState *fs, uint32_t id, }; if (!kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING)) { - return -ENOSYS; + /* nothing to do */ + return 0; } r = ioctl(flic->fd, KVM_SET_DEVICE_ATTR, &attr); @@ -195,7 +196,8 @@ static int kvm_s390_io_adapter_map(S390FLICState *fs, uint32_t id, int r; if (!kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING)) { - return -ENOSYS; + /* nothing to do */ + return 0; } r = ioctl(flic->fd, KVM_SET_DEVICE_ATTR, &attr); |