Subject: virtio: Dont add "config" to list for !per_vq_vector Date: Wed, 05 Oct 2011 11:08:59 +0530 For the MSI but non-per_vq_vector case, the config/change vq also gets added to the list of vqs that need to process the MSI interrupt. This is not needed as config has it's own handler (vp_config_changed). In any case, vring_interrupt() finds nothing needs to be done on this vq. I tested this patch by testing the "Fallback:" and "Finally fall back" cases in vp_find_vqs(). Please review. Signed-off-by: Krishna Kumar Acked-by: Michael S. Tsirkin Signed-off-by: Rusty Russell --- drivers/virtio/virtio_pci.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff -ruNp org/drivers/virtio/virtio_pci.c new/drivers/virtio/virtio_pci.c --- org/drivers/virtio/virtio_pci.c 2011-10-03 09:10:11.000000000 +0530 +++ new/drivers/virtio/virtio_pci.c 2011-10-04 19:16:34.000000000 +0530 @@ -415,9 +415,13 @@ static struct virtqueue *setup_vq(struct } } - spin_lock_irqsave(&vp_dev->lock, flags); - list_add(&info->node, &vp_dev->virtqueues); - spin_unlock_irqrestore(&vp_dev->lock, flags); + if (callback) { + spin_lock_irqsave(&vp_dev->lock, flags); + list_add(&info->node, &vp_dev->virtqueues); + spin_unlock_irqrestore(&vp_dev->lock, flags); + } else { + INIT_LIST_HEAD(&info->node); + } return vq; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/