[PATCH 3.16 222/366] virtio_console: don't tie bufs to a vq

[Ben Hutchings]

3.16.60-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: "Michael S. Tsirkin" <m...@redhat.com>

commit 2855b33514d290c51d52d94e25d3ef942cd4d578 upstream.

an allocated buffer doesn't need to be tied to a vq -
only vq->vdev is ever used. Pass the function the
just what it needs - the vdev.

Signed-off-by: Michael S. Tsirkin <m...@redhat.com>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
 drivers/char/virtio_console.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -417,7 +417,7 @@ static void reclaim_dma_bufs(void)
        }
 }
 
-static struct port_buffer *alloc_buf(struct virtqueue *vq, size_t buf_size,
+static struct port_buffer *alloc_buf(struct virtio_device *vdev, size_t 
buf_size,
                                     int pages)
 {
        struct port_buffer *buf;
@@ -440,7 +440,7 @@ static struct port_buffer *alloc_buf(str
                return buf;
        }
 
-       if (is_rproc_serial(vq->vdev)) {
+       if (is_rproc_serial(vdev)) {
                /*
                 * Allocate DMA memory from ancestor. When a virtio
                 * device is created by remoteproc, the DMA memory is
@@ -450,9 +450,9 @@ static struct port_buffer *alloc_buf(str
                 * DMA_MEMORY_INCLUDES_CHILDREN had been supported
                 * in dma-coherent.c
                 */
-               if (!vq->vdev->dev.parent || !vq->vdev->dev.parent->parent)
+               if (!vdev->dev.parent || !vdev->dev.parent->parent)
                        goto free_buf;
-               buf->dev = vq->vdev->dev.parent->parent;
+               buf->dev = vdev->dev.parent->parent;
 
                /* Increase device refcnt to avoid freeing it */
                get_device(buf->dev);
@@ -834,7 +834,7 @@ static ssize_t port_fops_write(struct fi
 
        count = min((size_t)(32 * 1024), count);
 
-       buf = alloc_buf(port->out_vq, count, 0);
+       buf = alloc_buf(port->portdev->vdev, count, 0);
        if (!buf)
                return -ENOMEM;
 
@@ -953,7 +953,7 @@ static ssize_t port_fops_splice_write(st
        if (ret < 0)
                goto error_out;
 
-       buf = alloc_buf(port->out_vq, 0, pipe->nrbufs);
+       buf = alloc_buf(port->portdev->vdev, 0, pipe->nrbufs);
        if (!buf) {
                ret = -ENOMEM;
                goto error_out;
@@ -1370,7 +1370,7 @@ static unsigned int fill_queue(struct vi
 
        nr_added_bufs = 0;
        do {
-               buf = alloc_buf(vq, PAGE_SIZE, 0);
+               buf = alloc_buf(vq->vdev, PAGE_SIZE, 0);
                if (!buf)
                        break;