netdev - Re: [PATCH v1 2/3] virtio: vp_find_vqs accept channel setting params

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Date:	Tue, 27 Oct 2015 02:14:37 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Ravi Kerur <rkerur@...il.com>
Cc:	kbuild-all@...org, netdev@...r.kernel.org, jasowang@...hat.com,
	mst@...hat.com, rusty@...tcorp.com.au,
	Ravi Kerur <rkerur@...il.com>
Subject: Re: [PATCH v1 2/3] virtio: vp_find_vqs accept channel setting params

Hi Ravi,

[auto build test ERROR on char-misc/char-misc-next -- if it's inappropriate base, please suggest rules for selecting the more suitable base]

url:    https://github.com/0day-ci/linux/commits/Ravi-Kerur/virtio-net-Using-single-MSIX-IRQ-for-TX-RX-Q-pair/20151027-015503
config: x86_64-randconfig-x016-201543 (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

Note: the linux-review/Ravi-Kerur/virtio-net-Using-single-MSIX-IRQ-for-TX-RX-Q-pair/20151027-015503 HEAD 69781953042f14dfe510f90e63b4366d729daf9e builds fine.
      It only hurts bisectibility.

All error/warnings (new ones prefixed by >>):

>> drivers/misc/mic/card/mic_virtio.c:372:14: warning: initialization from incompatible pointer type [-Wincompatible-pointer-types]
     .find_vqs = mic_find_vqs,
                 ^
   drivers/misc/mic/card/mic_virtio.c:372:14: note: (near initialization for 'mic_vq_config_ops.find_vqs')
--
   drivers/virtio/virtio_pci_modern.c: In function 'vp_modern_find_vqs':
>> drivers/virtio/virtio_pci_modern.c:428:11: error: too many arguments to function 'vp_find_vqs'
     int rc = vp_find_vqs(vdev, nvqs, vqs, callbacks, names,
              ^
   In file included from drivers/virtio/virtio_pci_modern.c:21:0:
   drivers/virtio/virtio_pci_common.h:139:5: note: declared here
    int vp_find_vqs(struct virtio_device *vdev, unsigned nvqs,
        ^
   drivers/virtio/virtio_pci_modern.c: At top level:
>> drivers/virtio/virtio_pci_modern.c:474:14: warning: initialization from incompatible pointer type [-Wincompatible-pointer-types]
     .find_vqs = vp_modern_find_vqs,
                 ^
   drivers/virtio/virtio_pci_modern.c:474:14: note: (near initialization for 'virtio_pci_config_nodev_ops.find_vqs')
   drivers/virtio/virtio_pci_modern.c:489:14: warning: initialization from incompatible pointer type [-Wincompatible-pointer-types]
     .find_vqs = vp_modern_find_vqs,
                 ^
   drivers/virtio/virtio_pci_modern.c:489:14: note: (near initialization for 'virtio_pci_config_ops.find_vqs')

vim +/vp_find_vqs +428 drivers/virtio/virtio_pci_modern.c

   422				      unsigned channels[],
   423				      const char *channel_names[],
   424				      unsigned nchannels)
   425	{
   426		struct virtio_pci_device *vp_dev = to_vp_device(vdev);
   427		struct virtqueue *vq;
 > 428		int rc = vp_find_vqs(vdev, nvqs, vqs, callbacks, names,
   429				     NULL, NULL, 0);
   430	
   431		if (rc)
   432			return rc;
   433	
   434		/* Select and activate all queues. Has to be done last: once we do
   435		 * this, there's no way to go back except reset.
   436		 */
   437		list_for_each_entry(vq, &vdev->vqs, list) {
   438			vp_iowrite16(vq->index, &vp_dev->common->queue_select);
   439			vp_iowrite16(1, &vp_dev->common->queue_enable);
   440		}
   441	
   442		return 0;
   443	}
   444	
   445	static void del_vq(struct virtio_pci_vq_info *info)
   446	{
   447		struct virtqueue *vq = info->vq;
   448		struct virtio_pci_device *vp_dev = to_vp_device(vq->vdev);
   449	
   450		vp_iowrite16(vq->index, &vp_dev->common->queue_select);
   451	
   452		if (vp_dev->msix_enabled) {
   453			vp_iowrite16(VIRTIO_MSI_NO_VECTOR,
   454				     &vp_dev->common->queue_msix_vector);
   455			/* Flush the write out to device */
   456			vp_ioread16(&vp_dev->common->queue_msix_vector);
   457		}
   458	
   459		if (!vp_dev->notify_base)
   460			pci_iounmap(vp_dev->pci_dev, (void __force __iomem *)vq->priv);
   461	
   462		vring_del_virtqueue(vq);
   463	
   464		free_pages_exact(info->queue, vring_pci_size(info->num));
   465	}
   466	
   467	static const struct virtio_config_ops virtio_pci_config_nodev_ops = {
   468		.get		= NULL,
   469		.set		= NULL,
   470		.generation	= vp_generation,
   471		.get_status	= vp_get_status,
   472		.set_status	= vp_set_status,
   473		.reset		= vp_reset,
 > 474		.find_vqs	= vp_modern_find_vqs,
   475		.del_vqs	= vp_del_vqs,
   476		.get_features	= vp_get_features,
   477		.finalize_features = vp_finalize_features,

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