Replace duplicated code in all transports with a single wrapper in
virtio.c.
The only functional change is in virtio_mmio.c: if a buggy device sends
us an interrupt before driver is set, we previously returned IRQ_NONE,
now we return IRQ_HANDLED.
As this must not happen in practice, this does not look like a big deal.
See also commit
3fff0179e33cd7d0a688dab65700c46ad089e934
virtio-pci: do not oops on config change if driver not loaded.
for the original motivation behind the driver check.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
struct mic_device_ctrl __iomem *dc
= (void __iomem *)d + mic_aligned_desc_size(d);
struct mic_vdev *mvdev = (struct mic_vdev *)ioread64(&dc->vdev);
- struct virtio_driver *drv;
if (ioread8(&dc->config_change) != MIC_VIRTIO_PARAM_CONFIG_CHANGED)
return;
dev_dbg(mdrv->dev, "%s %d\n", __func__, __LINE__);
- drv = container_of(mvdev->vdev.dev.driver,
- struct virtio_driver, driver);
- if (drv->config_changed)
- drv->config_changed(&mvdev->vdev);
+ virtio_config_changed(&mvdev->vdev);
iowrite8(1, &dc->guest_ack);
}
switch (param) {
case VIRTIO_PARAM_CONFIG_CHANGED:
- {
- struct virtio_driver *drv;
- drv = container_of(vq->vdev->dev.driver,
- struct virtio_driver, driver);
- if (drv->config_changed)
- drv->config_changed(vq->vdev);
-
+ virtio_config_changed(vq->vdev);
break;
- }
case VIRTIO_PARAM_DEV_ADD:
schedule_work(&hotplug_work);
break;
vring_interrupt(0, vq);
}
if (test_bit(0, &vcdev->indicators2)) {
- drv = container_of(vcdev->vdev.dev.driver,
- struct virtio_driver, driver);
-
- if (drv && drv->config_changed)
- drv->config_changed(&vcdev->vdev);
+ virtio_config_changed(&vcdev->vdev);
clear_bit(0, &vcdev->indicators2);
}
}
}
EXPORT_SYMBOL_GPL(unregister_virtio_device);
+void virtio_config_changed(struct virtio_device *dev)
+{
+ struct virtio_driver *drv = drv_to_virtio(dev->dev.driver);
+
+ if (drv && drv->config_changed)
+ drv->config_changed(dev);
+}
+EXPORT_SYMBOL_GPL(virtio_config_changed);
+
static int virtio_init(void)
{
if (bus_register(&virtio_bus) != 0)
{
struct virtio_mmio_device *vm_dev = opaque;
struct virtio_mmio_vq_info *info;
- struct virtio_driver *vdrv = container_of(vm_dev->vdev.dev.driver,
- struct virtio_driver, driver);
unsigned long status;
unsigned long flags;
irqreturn_t ret = IRQ_NONE;
status = readl(vm_dev->base + VIRTIO_MMIO_INTERRUPT_STATUS);
writel(status, vm_dev->base + VIRTIO_MMIO_INTERRUPT_ACK);
- if (unlikely(status & VIRTIO_MMIO_INT_CONFIG)
- && vdrv && vdrv->config_changed) {
- vdrv->config_changed(&vm_dev->vdev);
+ if (unlikely(status & VIRTIO_MMIO_INT_CONFIG)) {
+ virtio_config_changed(&vm_dev->vdev);
ret = IRQ_HANDLED;
}
static irqreturn_t vp_config_changed(int irq, void *opaque)
{
struct virtio_pci_device *vp_dev = opaque;
- struct virtio_driver *drv;
- drv = container_of(vp_dev->vdev.dev.driver,
- struct virtio_driver, driver);
- if (drv && drv->config_changed)
- drv->config_changed(&vp_dev->vdev);
+ virtio_config_changed(&vp_dev->vdev);
return IRQ_HANDLED;
}
void virtio_break_device(struct virtio_device *dev);
+void virtio_config_changed(struct virtio_device *dev);
+
/**
* virtio_driver - operations for a virtio I/O driver
* @driver: underlying device driver (populate name and owner).