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-rw-r--r--arch/s390/include/asm/pci.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
index 305befd55326..a2399eff84ca 100644
--- a/arch/s390/include/asm/pci.h
+++ b/arch/s390/include/asm/pci.h
@@ -194,6 +194,11 @@ int zpci_init_iommu(struct zpci_dev *zdev);
void zpci_destroy_iommu(struct zpci_dev *zdev);
#ifdef CONFIG_PCI
+static inline bool zpci_use_mio(struct zpci_dev *zdev)
+{
+ return static_branch_likely(&have_mio) && zdev->mio_capable;
+}
+
/* Error handling and recovery */
void zpci_event_error(void *);
void zpci_event_availability(void *);