diff options
Diffstat (limited to 'xen/arch/x86/hpet.c')
| -rw-r--r-- | xen/arch/x86/hpet.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/xen/arch/x86/hpet.c b/xen/arch/x86/hpet.c index 14041968a7..946d133655 100644 --- a/xen/arch/x86/hpet.c +++ b/xen/arch/x86/hpet.c @@ -254,13 +254,22 @@ static void hpet_msi_mask(struct irq_desc *desc) ch->msi.msi_attrib.masked = 1; } -static void hpet_msi_write(struct hpet_event_channel *ch, struct msi_msg *msg) +static int hpet_msi_write(struct hpet_event_channel *ch, struct msi_msg *msg) { ch->msi.msg = *msg; + if ( iommu_intremap ) - iommu_update_ire_from_msi(&ch->msi, msg); + { + int rc = iommu_update_ire_from_msi(&ch->msi, msg); + + if ( rc ) + return rc; + } + hpet_write32(msg->data, HPET_Tn_ROUTE(ch->idx)); hpet_write32(msg->address_lo, HPET_Tn_ROUTE(ch->idx) + 4); + + return 0; } static void __maybe_unused @@ -318,12 +327,12 @@ static hw_irq_controller hpet_msi_type = { .set_affinity = hpet_msi_set_affinity, }; -static void __hpet_setup_msi_irq(struct irq_desc *desc) +static int __hpet_setup_msi_irq(struct irq_desc *desc) { struct msi_msg msg; msi_compose_msg(desc, &msg); - hpet_msi_write(desc->action->dev_id, &msg); + return hpet_msi_write(desc->action->dev_id, &msg); } static int __init hpet_setup_msi_irq(struct hpet_event_channel *ch) @@ -347,6 +356,8 @@ static int __init hpet_setup_msi_irq(struct hpet_event_channel *ch) desc->handler = &hpet_msi_type; ret = request_irq(ch->msi.irq, hpet_interrupt_handler, 0, "HPET", ch); + if ( ret >= 0 ) + ret = __hpet_setup_msi_irq(desc); if ( ret < 0 ) { if ( iommu_intremap ) @@ -354,7 +365,6 @@ static int __init hpet_setup_msi_irq(struct hpet_event_channel *ch) return ret; } - __hpet_setup_msi_irq(desc); desc->msi_desc = &ch->msi; return 0; |