@@ -1019,8 +1019,8 @@ static int vu_find_vqs(struct virtio_device *vdev, unsigned nvqs,
struct irq_affinity *desc)
{
struct virtio_uml_device *vu_dev = to_virtio_uml_device(vdev);
- int i, queue_idx = 0, rc;
struct virtqueue *vq;
+ int i, rc;
/* not supported for now */
if (WARN_ON(nvqs > 64))
@@ -1032,11 +1032,11 @@ static int vu_find_vqs(struct virtio_device *vdev, unsigned nvqs,
for (i = 0; i < nvqs; ++i) {
if (!names[i]) {
- vqs[i] = NULL;
- continue;
+ rc = -EINVAL;
+ goto error_setup;
}
- vqs[i] = vu_setup_vq(vdev, queue_idx++, callbacks[i], names[i],
+ vqs[i] = vu_setup_vq(vdev, i, callbacks[i], names[i],
ctx ? ctx[i] : false);
if (IS_ERR(vqs[i])) {
rc = PTR_ERR(vqs[i]);
@@ -119,9 +119,6 @@ static struct virtqueue *rp_find_vq(struct virtio_device *vdev,
if (id >= ARRAY_SIZE(rvdev->vring))
return ERR_PTR(-EINVAL);
- if (!name)
- return NULL;
-
/* Search allocated memory region by name */
mem = rproc_find_carveout_by_name(rproc, "vdev%dvring%d", rvdev->index,
id);
@@ -187,15 +184,15 @@ static int rproc_virtio_find_vqs(struct virtio_device *vdev, unsigned int nvqs,
const bool * ctx,
struct irq_affinity *desc)
{
- int i, ret, queue_idx = 0;
+ int i, ret;
for (i = 0; i < nvqs; ++i) {
if (!names[i]) {
- vqs[i] = NULL;
- continue;
+ ret = -EINVAL;
+ goto error;
}
- vqs[i] = rp_find_vq(vdev, queue_idx++, callbacks[i], names[i],
+ vqs[i] = rp_find_vq(vdev, i, callbacks[i], names[i],
ctx ? ctx[i] : false);
if (IS_ERR(vqs[i])) {
ret = PTR_ERR(vqs[i]);
@@ -659,7 +659,7 @@ static int virtio_ccw_find_vqs(struct virtio_device *vdev, unsigned nvqs,
{
struct virtio_ccw_device *vcdev = to_vc_device(vdev);
unsigned long *indicatorp = NULL;
- int ret, i, queue_idx = 0;
+ int ret, i;
struct ccw1 *ccw;
ccw = ccw_device_dma_zalloc(vcdev->cdev, sizeof(*ccw));
@@ -668,11 +668,11 @@ static int virtio_ccw_find_vqs(struct virtio_device *vdev, unsigned nvqs,
for (i = 0; i < nvqs; ++i) {
if (!names[i]) {
- vqs[i] = NULL;
- continue;
+ ret = -EINVAL;
+ goto out;
}
- vqs[i] = virtio_ccw_setup_vq(vdev, queue_idx++, callbacks[i],
+ vqs[i] = virtio_ccw_setup_vq(vdev, i, callbacks[i],
names[i], ctx ? ctx[i] : false,
ccw);
if (IS_ERR(vqs[i])) {
@@ -386,9 +386,6 @@ static struct virtqueue *vm_setup_vq(struct virtio_device *vdev, unsigned int in
else
notify = vm_notify;
- if (!name)
- return NULL;
-
/* Select the queue we're interested in */
writel(index, vm_dev->base + VIRTIO_MMIO_QUEUE_SEL);
@@ -496,7 +493,7 @@ static int vm_find_vqs(struct virtio_device *vdev, unsigned int nvqs,
{
struct virtio_mmio_device *vm_dev = to_virtio_mmio_device(vdev);
int irq = platform_get_irq(vm_dev->pdev, 0);
- int i, err, queue_idx = 0;
+ int i, err;
if (irq < 0)
return irq;
@@ -511,11 +508,11 @@ static int vm_find_vqs(struct virtio_device *vdev, unsigned int nvqs,
for (i = 0; i < nvqs; ++i) {
if (!names[i]) {
- vqs[i] = NULL;
- continue;
+ vm_del_vqs(vdev);
+ return -EINVAL;
}
- vqs[i] = vm_setup_vq(vdev, queue_idx++, callbacks[i], names[i],
+ vqs[i] = vm_setup_vq(vdev, i, callbacks[i], names[i],
ctx ? ctx[i] : false);
if (IS_ERR(vqs[i])) {
vm_del_vqs(vdev);
@@ -292,7 +292,7 @@ static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned int nvqs,
{
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
u16 msix_vec;
- int i, err, nvectors, allocated_vectors, queue_idx = 0;
+ int i, err, nvectors, allocated_vectors;
vp_dev->vqs = kcalloc(nvqs, sizeof(*vp_dev->vqs), GFP_KERNEL);
if (!vp_dev->vqs)
@@ -302,7 +302,7 @@ static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned int nvqs,
/* Best option: one for change interrupt, one per vq. */
nvectors = 1;
for (i = 0; i < nvqs; ++i)
- if (names[i] && callbacks[i])
+ if (callbacks[i])
++nvectors;
} else {
/* Second best: one for change, shared for all vqs. */
@@ -318,8 +318,8 @@ static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned int nvqs,
allocated_vectors = vp_dev->msix_used_vectors;
for (i = 0; i < nvqs; ++i) {
if (!names[i]) {
- vqs[i] = NULL;
- continue;
+ err = -EINVAL;
+ goto error_find;
}
if (!callbacks[i])
@@ -328,7 +328,7 @@ static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned int nvqs,
msix_vec = allocated_vectors++;
else
msix_vec = VP_MSIX_VQ_VECTOR;
- vqs[i] = vp_setup_vq(vdev, queue_idx++, callbacks[i], names[i],
+ vqs[i] = vp_setup_vq(vdev, i, callbacks[i], names[i],
ctx ? ctx[i] : false,
msix_vec);
if (IS_ERR(vqs[i])) {
@@ -363,7 +363,7 @@ static int vp_find_vqs_intx(struct virtio_device *vdev, unsigned int nvqs,
const char * const names[], const bool *ctx)
{
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
- int i, err, queue_idx = 0;
+ int i, err;
vp_dev->vqs = kcalloc(nvqs, sizeof(*vp_dev->vqs), GFP_KERNEL);
if (!vp_dev->vqs)
@@ -378,10 +378,10 @@ static int vp_find_vqs_intx(struct virtio_device *vdev, unsigned int nvqs,
vp_dev->per_vq_vectors = false;
for (i = 0; i < nvqs; ++i) {
if (!names[i]) {
- vqs[i] = NULL;
- continue;
+ err = -EINVAL;
+ goto out_del_vqs;
}
- vqs[i] = vp_setup_vq(vdev, queue_idx++, callbacks[i], names[i],
+ vqs[i] = vp_setup_vq(vdev, i, callbacks[i], names[i],
ctx ? ctx[i] : false,
VIRTIO_MSI_NO_VECTOR);
if (IS_ERR(vqs[i])) {
@@ -161,9 +161,6 @@ virtio_vdpa_setup_vq(struct virtio_device *vdev, unsigned int index,
bool may_reduce_num = true;
int err;
- if (!name)
- return NULL;
-
if (index >= vdpa->nvqs)
return ERR_PTR(-ENOENT);
@@ -370,7 +367,7 @@ static int virtio_vdpa_find_vqs(struct virtio_device *vdev, unsigned int nvqs,
struct cpumask *masks;
struct vdpa_callback cb;
bool has_affinity = desc && ops->set_vq_affinity;
- int i, err, queue_idx = 0;
+ int i, err;
if (has_affinity) {
masks = create_affinity_masks(nvqs, desc ? desc : &default_affd);
@@ -380,11 +377,11 @@ static int virtio_vdpa_find_vqs(struct virtio_device *vdev, unsigned int nvqs,
for (i = 0; i < nvqs; ++i) {
if (!names[i]) {
- vqs[i] = NULL;
- continue;
+ err = -EINVAL;
+ goto err_setup_vq;
}
- vqs[i] = virtio_vdpa_setup_vq(vdev, queue_idx++,
+ vqs[i] = virtio_vdpa_setup_vq(vdev, i,
callbacks[i], names[i], ctx ?
ctx[i] : false);
if (IS_ERR(vqs[i])) {
@@ -56,7 +56,7 @@ typedef void vq_callback_t(struct virtqueue *);
* callbacks: array of callbacks, for each virtqueue
* include a NULL entry for vqs that do not need a callback
* names: array of virtqueue names (mainly for debugging)
- * include a NULL entry for vqs unused by driver
+ * MUST NOT be NULL
* Returns 0 on success or error status
* @del_vqs: free virtqueues found by find_vqs().
* @synchronize_cbs: synchronize with the virtqueue callbacks (optional)
commit 6457f126c888 ("virtio: support reserved vqs") introduced this support. Multiqueue virtio-net use 2N as ctrl vq finally, so the logic doesn't apply. And not one uses this. On the other side, that makes some trouble for us to refactor the find_vqs() params. So I remove this support. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> --- arch/um/drivers/virtio_uml.c | 8 ++++---- drivers/remoteproc/remoteproc_virtio.c | 11 ++++------- drivers/s390/virtio/virtio_ccw.c | 8 ++++---- drivers/virtio/virtio_mmio.c | 11 ++++------- drivers/virtio/virtio_pci_common.c | 18 +++++++++--------- drivers/virtio/virtio_vdpa.c | 11 ++++------- include/linux/virtio_config.h | 2 +- 7 files changed, 30 insertions(+), 39 deletions(-)