[libvirt PATCH] qemu: fix crash in qemuDomainSetBlkioParameters without cgroups

[Ján Tomko]

On a Tuesday in 2020, Pavel Hrdina wrote:
>If we don't have cgroups available and user tries to update blkio
>parameters for running VM it will crash.
>
>It should have been protected by the virCgroupHasController() check but
>it was never called if the API was executed without any flags.
>
>We call virDomainObjGetDefs() which sets `def` and `persistentDef` based
>on the flags and these two variables should be used to figure out if we
>need to update LIVE, CONFIG or both states.
>
>Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1808293
>
>Signed-off-by: Pavel Hrdina <phrdina at redhat.com>
>---
> src/qemu/qemu_driver.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>

Reviewed-by: Ján Tomko <jtomko at redhat.com>

Jano
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