Re: [PATCH] accel/kvm/kvm-all: Fix wrong return code handling in dirty log code

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

On 1/29/21 9:43 AM, Thomas Huth wrote:
> The kvm_vm_ioctl() wrapper already returns -errno if the ioctl itself
> returned -1, so the callers of kvm_vm_ioctl() should not check for -1
> but for a value < 0 instead.
> 
> This problem has been fixed once already in commit b533f658a98325d0e4
> but that commit missed that the ENOENT error code is not fatal for
> this ioctl, so the commit has been reverted in commit 50212d6346f33d6e
> since the problem occurred close to a pending release at that point
> in time. The plan was to fix it properly after the release, but it
> seems like this has been forgotten. So let's do it now finally instead.
> 
> Resolves: https://bugs.launchpad.net/qemu/+bug/1294227

Is this the "Close the oldest Launchpad bug" contest? =)

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

> Signed-off-by: Thomas Huth <thuth@redhat.com>
> ---
>  accel/kvm/kvm-all.c | 21 ++++++++++++---------
>  1 file changed, 12 insertions(+), 9 deletions(-)