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path: root/drivers/xen/platform-pci.c
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Diffstat (limited to 'drivers/xen/platform-pci.c')
-rw-r--r--drivers/xen/platform-pci.c14
1 files changed, 4 insertions, 10 deletions
diff --git a/drivers/xen/platform-pci.c b/drivers/xen/platform-pci.c
index 2a165cc8a43c..1275df83070f 100644
--- a/drivers/xen/platform-pci.c
+++ b/drivers/xen/platform-pci.c
@@ -90,8 +90,10 @@ static int xen_allocate_irq(struct pci_dev *pdev)
static int platform_pci_resume(struct pci_dev *pdev)
{
int err;
- if (!xen_pv_domain())
+
+ if (xen_have_vector_callback)
return 0;
+
err = xen_set_callback_via(callback_via);
if (err) {
dev_err(&pdev->dev, "platform_pci_resume failure!\n");
@@ -137,15 +139,7 @@ static int platform_pci_probe(struct pci_dev *pdev,
platform_mmio = mmio_addr;
platform_mmiolen = mmio_len;
-
- /*
- * Xen HVM guests always use the vector callback mechanism.
- * L1 Dom0 in a nested Xen environment is a PV guest inside in an
- * HVM environment. It needs the platform-pci driver to get
- * notifications from L0 Xen, but it cannot use the vector callback
- * as it is not exported by L1 Xen.
- */
- if (xen_pv_domain()) {
+ if (!xen_have_vector_callback) {
ret = xen_allocate_irq(pdev);
if (ret) {
dev_warn(&pdev->dev, "request_irq failed err=%d\n", ret);