KVM: arm64: check for ITS device on MSI injection
When userspace provides the doorbell address for an MSI to be injected into the guest, we find a KVM device which feels responsible. Lets check that this device is really an emulated ITS before we make real use of the container_of-ed pointer. [ Moved NULL-pointer check to caller of static function - Christoffer ] Signed-off-by: NAndre Przywara <andre.przywara@arm.com> Reviewed-by: NChristoffer Dall <christoffer.dall@linaro.org> Signed-off-by: NChristoffer Dall <christoffer.dall@linaro.org>
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