1 files changed, 9 insertions, 8 deletions

diff --git a/Documentation/lguest/lguest.c b/Documentation/lguest/lguest.c
index f2668390e8f7..42008395534d 100644
--- a/Documentation/lguest/lguest.c
+++ b/Documentation/lguest/lguest.c
@@ -62,8 +62,8 @@ typedef uint8_t u8;
 #endif
 /* We can have up to 256 pages for devices. */
 #define DEVICE_PAGES 256
-/* This fits nicely in a single 4096-byte page. */
-#define VIRTQUEUE_NUM 127
+/* This will occupy 2 pages: it must be a power of 2. */
+#define VIRTQUEUE_NUM 128
 
 /*L:120 verbose is both a global flag and a macro.  The C preprocessor allows
  * this, and although I wouldn't recommend it, it works quite nicely here. */
@@ -1036,7 +1036,8 @@ static void add_virtqueue(struct device *dev, unsigned int num_descs,
         void *p;
 
         /* First we need some pages for this virtqueue. */
-        pages = (vring_size(num_descs) + getpagesize() - 1) / getpagesize();
+        pages = (vring_size(num_descs, getpagesize()) + getpagesize() - 1)
+                / getpagesize();
         p = get_pages(pages);
 
         /* Initialize the configuration. */
@@ -1045,7 +1046,7 @@ static void add_virtqueue(struct device *dev, unsigned int num_descs,
         vq->config.pfn = to_guest_phys(p) / getpagesize();
 
         /* Initialize the vring. */
-        vring_init(&vq->vring, num_descs, p);
+        vring_init(&vq->vring, num_descs, p, getpagesize());
 
         /* Add the configuration information to this device's descriptor. */
         add_desc_field(dev, VIRTIO_CONFIG_F_VIRTQUEUE,
@@ -1342,7 +1343,7 @@ static bool service_io(struct device *dev)
         if (out->type & VIRTIO_BLK_T_SCSI_CMD) {
                 fprintf(stderr, "Scsi commands unsupported\n");
                 in->status = VIRTIO_BLK_S_UNSUPP;
-                wlen = sizeof(in);
+                wlen = sizeof(*in);
         } else if (out->type & VIRTIO_BLK_T_OUT) {
                 /* Write */
 
@@ -1363,7 +1364,7 @@ static bool service_io(struct device *dev)
                         /* Die, bad Guest, die. */
                         errx(1, "Write past end %llu+%u", off, ret);
                 }
-                wlen = sizeof(in);
+                wlen = sizeof(*in);
                 in->status = (ret >= 0 ? VIRTIO_BLK_S_OK : VIRTIO_BLK_S_IOERR);
         } else {
                 /* Read */
@@ -1376,10 +1377,10 @@ static bool service_io(struct device *dev)
                 ret = readv(vblk->fd, iov+1, in_num-1);
                 verbose("READ from sector %llu: %i\n", out->sector, ret);
                 if (ret >= 0) {
-                        wlen = sizeof(in) + ret;
+                        wlen = sizeof(*in) + ret;
                         in->status = VIRTIO_BLK_S_OK;
                 } else {
-                        wlen = sizeof(in);
+                        wlen = sizeof(*in);
                         in->status = VIRTIO_BLK_S_IOERR;
                 }
         }