Hi Eric, On Sat, 12 Dec 2020 18:50:04 +0000, Eric Auger <eric.auger@xxxxxxxxxx> wrote: > > vgic_register_all_redist_iodevs may succeed while > vgic_register_all_redist_iodevs fails. For example this can happen The same function cannot both fail and succeed ;-) Can you shed some light on what you had in mind? > while adding a redistributor region overlapping a dist region. The > failure only is detected on vgic_register_all_redist_iodevs when > vgic_v3_check_base() gets called. > > In such a case, remove the newly added redistributor region and free > it. > > Signed-off-by: Eric Auger <eric.auger@xxxxxxxxxx> > --- > arch/arm64/kvm/vgic/vgic-mmio-v3.c | 8 +++++++- > 1 file changed, 7 insertions(+), 1 deletion(-) > > diff --git a/arch/arm64/kvm/vgic/vgic-mmio-v3.c b/arch/arm64/kvm/vgic/vgic-mmio-v3.c > index 8e8a862def76..581f0f490000 100644 > --- a/arch/arm64/kvm/vgic/vgic-mmio-v3.c > +++ b/arch/arm64/kvm/vgic/vgic-mmio-v3.c > @@ -866,8 +866,14 @@ int vgic_v3_set_redist_base(struct kvm *kvm, u32 index, u64 addr, u32 count) > * afterwards will register the iodevs when needed. > */ > ret = vgic_register_all_redist_iodevs(kvm); > - if (ret) > + if (ret) { > + struct vgic_redist_region *rdreg = > + vgic_v3_rdist_region_from_index(kvm, index); > + nit: consider splitting declaration and assignment so that we avoid the line split if you insist on the 80 character limit. > + list_del(&rdreg->list); > + kfree(rdreg); > return ret; > + } > > return 0; > } > -- > 2.21.3 > > Thanks, M. -- Without deviation from the norm, progress is not possible.