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Subject[PATCH V2 03/19] virtio-pci-modern: factor out modern device initialization logic
Date
This patch factors out the modern device initialization logic into a
helper. Note that it still depends on the caller to enable pci device
which allows the caller to use e.g devres.

Signed-off-by: Jason Wang <jasowang@redhat.com>
---
drivers/virtio/virtio_pci_modern.c | 50 +++++++++++++++++++++---------
1 file changed, 36 insertions(+), 14 deletions(-)

diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c
index 524490a94ca4..5d2d2ae0dfdb 100644
--- a/drivers/virtio/virtio_pci_modern.c
+++ b/drivers/virtio/virtio_pci_modern.c
@@ -703,11 +703,16 @@ static inline void check_offsets(void)
offsetof(struct virtio_pci_common_cfg, queue_used_hi));
}

-/* the PCI probing function */
-int virtio_pci_modern_probe(struct virtio_pci_device *vp_dev)
+/*
+ * vp_modern_probe: probe the modern virtio pci device, note that the
+ * caller is required to enable PCI device before calling this function.
+ * @mdev: the modern virtio-pci device
+ *
+ * Return 0 on succeed otherwise fail
+ */
+static int vp_modern_probe(struct virtio_pci_modern_device *mdev)
{
- struct virtio_pci_modern_device *mdev = &vp_dev->mdev;
- struct pci_dev *pci_dev = vp_dev->pci_dev;
+ struct pci_dev *pci_dev = mdev->pci_dev;
int err, common, isr, notify, device;
u32 notify_length;
u32 notify_offset;
@@ -826,18 +831,8 @@ int virtio_pci_modern_probe(struct virtio_pci_device *vp_dev)
&mdev->device_len);
if (!mdev->device)
goto err_map_device;
-
- vp_dev->vdev.config = &virtio_pci_config_ops;
- } else {
- vp_dev->vdev.config = &virtio_pci_config_nodev_ops;
}

- vp_dev->config_vector = vp_config_vector;
- vp_dev->setup_vq = setup_vq;
- vp_dev->del_vq = del_vq;
- vp_dev->isr = mdev->isr;
- vp_dev->vdev.id = mdev->id;
-
return 0;

err_map_device:
@@ -851,6 +846,33 @@ int virtio_pci_modern_probe(struct virtio_pci_device *vp_dev)
return err;
}

+/* the PCI probing function */
+int virtio_pci_modern_probe(struct virtio_pci_device *vp_dev)
+{
+ struct virtio_pci_modern_device *mdev = &vp_dev->mdev;
+ struct pci_dev *pci_dev = vp_dev->pci_dev;
+ int err;
+
+ mdev->pci_dev = pci_dev;
+
+ err = vp_modern_probe(mdev);
+ if (err)
+ return err;
+
+ if (mdev->device)
+ vp_dev->vdev.config = &virtio_pci_config_ops;
+ else
+ vp_dev->vdev.config = &virtio_pci_config_nodev_ops;
+
+ vp_dev->config_vector = vp_config_vector;
+ vp_dev->setup_vq = setup_vq;
+ vp_dev->del_vq = del_vq;
+ vp_dev->isr = mdev->isr;
+ vp_dev->vdev.id = mdev->id;
+
+ return 0;
+}
+
void virtio_pci_modern_remove(struct virtio_pci_device *vp_dev)
{
struct virtio_pci_modern_device *mdev = &vp_dev->mdev;
--
2.25.1
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