From: Jason Wang Date: Mon, 4 Jan 2021 06:54:52 +0000 (+0800) Subject: virtio-pci-modern: introduce vp_modern_generation() X-Git-Tag: v5.15~1524^2~23 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ed2a73dbab138b1af8501d48b4f57fa9be68f43c;p=platform%2Fkernel%2Flinux-starfive.git virtio-pci-modern: introduce vp_modern_generation() This patch introduces vp_modern_generation() to get device generation. Signed-off-by: Jason Wang Link: https://lore.kernel.org/r/20210104065503.199631-9-jasowang@redhat.com Signed-off-by: Michael S. Tsirkin --- diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c index cb14fc3..a128e58 100644 --- a/drivers/virtio/virtio_pci_modern.c +++ b/drivers/virtio/virtio_pci_modern.c @@ -289,15 +289,26 @@ static void vp_set(struct virtio_device *vdev, unsigned offset, } } -static u32 vp_generation(struct virtio_device *vdev) +/* + * vp_modern_generation - get the device genreation + * @mdev: the modern virtio-pci device + * + * Returns the genreation read from device + */ +static u32 vp_modern_generation(struct virtio_pci_modern_device *mdev) { - struct virtio_pci_device *vp_dev = to_vp_device(vdev); - struct virtio_pci_modern_device *mdev = &vp_dev->mdev; struct virtio_pci_common_cfg __iomem *cfg = mdev->common; return vp_ioread8(&cfg->config_generation); } +static u32 vp_generation(struct virtio_device *vdev) +{ + struct virtio_pci_device *vp_dev = to_vp_device(vdev); + + return vp_modern_generation(&vp_dev->mdev); +} + /* * vp_modern_get_status - get the device status * @mdev: the modern virtio-pci device