Revert "fix return check for KVM_GET_DIRTY_LOG ioctl"
This reverts commit b533f658a98325d0e47b36113bd9f5bcc046fdae.
The original code was wrong, because effectively it ignored errors
from kernel, because kernel does not return -1 on error case but
returns -errno, and does not return -EPERM for this particular ioctl.
But in some cases kernel actually returned unsuccessful result,
namely, when the dirty bitmap in requested slot does not exist
it returns -ENOENT. With new code this condition becomes an
error when it shouldn't be.
Revert that patch instead of fixing it properly this late in the
release process. I disagree with this approach, but let's make
things move _somewhere_, instead of arguing endlessly whch of
the 2 proposed fixes is better.
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Message-id: 1397477644-902-1-git-send-email-mjt@msgid.tls.msk.ru
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
diff --git a/kvm-all.c b/kvm-all.c
index cd4111d..82a9119 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -441,7 +441,7 @@
d.slot = mem->slot;
- if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) < 0) {
+ if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) {
DPRINTF("ioctl failed %d\n", errno);
ret = -1;
break;
