diff options
| -rw-r--r-- | drivers/virtio/virtio_pci_modern_dev.c | 3 | ||||
| -rw-r--r-- | include/linux/virtio_pci_modern.h | 3 |
2 files changed, 5 insertions, 1 deletions
diff --git a/drivers/virtio/virtio_pci_modern_dev.c b/drivers/virtio/virtio_pci_modern_dev.c index 9b2d6614de67..aad7d9296e77 100644 --- a/drivers/virtio/virtio_pci_modern_dev.c +++ b/drivers/virtio/virtio_pci_modern_dev.c @@ -268,7 +268,8 @@ int vp_modern_probe(struct virtio_pci_modern_device *mdev) return -EINVAL; } - err = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(64)); + err = dma_set_mask_and_coherent(&pci_dev->dev, + mdev->dma_mask ? : DMA_BIT_MASK(64)); if (err) err = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32)); diff --git a/include/linux/virtio_pci_modern.h b/include/linux/virtio_pci_modern.h index e7b1db1dd0bb..067ac1d789bc 100644 --- a/include/linux/virtio_pci_modern.h +++ b/include/linux/virtio_pci_modern.h @@ -41,6 +41,9 @@ struct virtio_pci_modern_device { /* optional check for vendor virtio device, returns dev_id or -ERRNO */ int (*device_id_check)(struct pci_dev *pdev); + + /* optional mask for devices with limited DMA space */ + u64 dma_mask; }; /* |