diff options
| -rw-r--r-- | net/9p/trans_virtio.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c index 3f69c428ddf9..bf61ca20e6a5 100644 --- a/net/9p/trans_virtio.c +++ b/net/9p/trans_virtio.c @@ -406,6 +406,7 @@ p9_virtio_zc_request(struct p9_client *client, struct p9_req_t *req, p9_debug(P9_DEBUG_TRANS, "virtio request\n"); if (uodata) { + __le32 sz; int n = p9_get_mapped_pages(chan, &out_pages, uodata, outlen, &offs, &need_drop); if (n < 0) @@ -416,6 +417,12 @@ p9_virtio_zc_request(struct p9_client *client, struct p9_req_t *req, memcpy(&req->tc->sdata[req->tc->size - 4], &v, 4); outlen = n; } + /* The size field of the message must include the length of the + * header and the length of the data. We didn't actually know + * the length of the data until this point so add it in now. + */ + sz = cpu_to_le32(req->tc->size + outlen); + memcpy(&req->tc->sdata[0], &sz, sizeof(sz)); } else if (uidata) { int n = p9_get_mapped_pages(chan, &in_pages, uidata, inlen, &offs, &need_drop); |