Re: [PATCH V3 1/2] vDPA/ifcvf: introduce get_dev_type() which returns virtio dev id

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在 2021/7/6 上午10:36, Zhu Lingshan 写道:
This commit introduces a new function get_dev_type() which returns
the virtio device id of a device, to avoid duplicated code.

Signed-off-by: Zhu Lingshan <lingshan.zhu@xxxxxxxxx>


Acked-by: Jason Wang <jasowang@xxxxxxxxxx>


---
  drivers/vdpa/ifcvf/ifcvf_main.c | 34 ++++++++++++++++++++-------------
  1 file changed, 21 insertions(+), 13 deletions(-)

diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index bc1d59f316d1..5f70ab1283a0 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -442,6 +442,26 @@ static const struct vdpa_config_ops ifc_vdpa_ops = {
  	.set_config_cb  = ifcvf_vdpa_set_config_cb,
  };
+static u32 get_dev_type(struct pci_dev *pdev)
+{
+	u32 dev_type;
+
+	/* This drirver drives both modern virtio devices and transitional
+	 * devices in modern mode.
+	 * vDPA requires feature bit VIRTIO_F_ACCESS_PLATFORM,
+	 * so legacy devices and transitional devices in legacy
+	 * mode will not work for vDPA, this driver will not
+	 * drive devices with legacy interface.
+	 */
+
+	if (pdev->device < 0x1040)
+		dev_type =  pdev->subsystem_device;
+	else
+		dev_type =  pdev->device - 0x1040;
+
+	return dev_type;
+}
+
  static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
  {
  	struct device *dev = &pdev->dev;
@@ -486,19 +506,7 @@ static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
  	pci_set_drvdata(pdev, adapter);
vf = &adapter->vf;
-
-	/* This drirver drives both modern virtio devices and transitional
-	 * devices in modern mode.
-	 * vDPA requires feature bit VIRTIO_F_ACCESS_PLATFORM,
-	 * so legacy devices and transitional devices in legacy
-	 * mode will not work for vDPA, this driver will not
-	 * drive devices with legacy interface.
-	 */
-	if (pdev->device < 0x1040)
-		vf->dev_type =  pdev->subsystem_device;
-	else
-		vf->dev_type =  pdev->device - 0x1040;
-
+	vf->dev_type = get_dev_type(pdev);
  	vf->base = pcim_iomap_table(pdev);
adapter->pdev = pdev;

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