On 2017年01月27日 16:16, Christoph Hellwig wrote:
We don't really need struct virtio_pci_vq_info, as most field in there are redundant: - the vq backpointer is not strictly neede to start with - the entry in the vqs list is not needed - the generic virtqueue already has list, we only need to check if it has a callback to get the same semantics - we can use a simple array to look up the MSI-X vec if needed. - That simple array now also duoble serves to replace the per_vq_vectors flag Signed-off-by: Christoph Hellwig <hch@xxxxxx> --- drivers/virtio/virtio_pci_common.c | 117 +++++++++++-------------------------- drivers/virtio/virtio_pci_common.h | 25 +------- drivers/virtio/virtio_pci_legacy.c | 6 +- drivers/virtio/virtio_pci_modern.c | 6 +- 4 files changed, 39 insertions(+), 115 deletions(-) diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c index 186cbab..a3376731 100644 --- a/drivers/virtio/virtio_pci_common.c +++ b/drivers/virtio/virtio_pci_common.c @@ -62,16 +62,13 @@ static irqreturn_t vp_config_changed(int irq, void *opaque) static irqreturn_t vp_vring_interrupt(int irq, void *opaque) { struct virtio_pci_device *vp_dev = opaque; - struct virtio_pci_vq_info *info; irqreturn_t ret = IRQ_NONE; - unsigned long flags; + struct virtqueue *vq;- spin_lock_irqsave(&vp_dev->lock, flags);- list_for_each_entry(info, &vp_dev->virtqueues, node) { - if (vring_interrupt(irq, info->vq) == IRQ_HANDLED) + list_for_each_entry(vq, &vp_dev->vdev.vqs, list) { + if (vq->callback && vring_interrupt(irq, vq) == IRQ_HANDLED)
The check of vq->callback seems redundant, we will check it soon in vring_interrupt().
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