hw/hyperv/vmbus: Remove unused vmbus_load/save_req()

vmbus_save_req() and vmbus_load_req() are not used.
Remove them to avoid maintaining dead code.

This essentially reverts commit 4dd8a7064b8a6527f99a62be11
("vmbus: add infrastructure to save/load vmbus requests").

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20211106134155.582312-2-philmd@redhat.com>
[MSS: Remove also corresponding variables, which are now unused]
Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>

hw/hyperv/vmbus.c

@@ -1273,105 +1273,6 @@ void vmbus_free_req(void *req)
     g_free(req);
 }
 
-static const VMStateDescription vmstate_sgent = {
-    .name = "vmbus/sgentry",
-    .version_id = 0,
-    .minimum_version_id = 0,
-    .fields = (VMStateField[]) {
-        VMSTATE_UINT64(base, ScatterGatherEntry),
-        VMSTATE_UINT64(len, ScatterGatherEntry),
-        VMSTATE_END_OF_LIST()
-    }
-};
-
-typedef struct VMBusChanReqSave {
-    uint16_t chan_idx;
-    uint16_t pkt_type;
-    uint32_t msglen;
-    void *msg;
-    uint64_t transaction_id;
-    bool need_comp;
-    uint32_t num;
-    ScatterGatherEntry *sgl;
-} VMBusChanReqSave;
-
-static const VMStateDescription vmstate_vmbus_chan_req = {
-    .name = "vmbus/vmbus_chan_req",
-    .version_id = 0,
-    .minimum_version_id = 0,
-    .fields = (VMStateField[]) {
-        VMSTATE_UINT16(chan_idx, VMBusChanReqSave),
-        VMSTATE_UINT16(pkt_type, VMBusChanReqSave),
-        VMSTATE_UINT32(msglen, VMBusChanReqSave),
-        VMSTATE_VBUFFER_ALLOC_UINT32(msg, VMBusChanReqSave, 0, NULL, msglen),
-        VMSTATE_UINT64(transaction_id, VMBusChanReqSave),
-        VMSTATE_BOOL(need_comp, VMBusChanReqSave),
-        VMSTATE_UINT32(num, VMBusChanReqSave),
-        VMSTATE_STRUCT_VARRAY_POINTER_UINT32(sgl, VMBusChanReqSave, num,
-                                             vmstate_sgent, ScatterGatherEntry),
-        VMSTATE_END_OF_LIST()
-    }
-};
-
-void vmbus_save_req(QEMUFile *f, VMBusChanReq *req)
-{
-    VMBusChanReqSave req_save;
-
-    req_save.chan_idx = req->chan->subchan_idx;
-    req_save.pkt_type = req->pkt_type;
-    req_save.msglen = req->msglen;
-    req_save.msg = req->msg;
-    req_save.transaction_id = req->transaction_id;
-    req_save.need_comp = req->need_comp;
-    req_save.num = req->sgl.nsg;
-    req_save.sgl = g_memdup(req->sgl.sg,
-                            req_save.num * sizeof(ScatterGatherEntry));
-
-    vmstate_save_state(f, &vmstate_vmbus_chan_req, &req_save, NULL);
-
-    g_free(req_save.sgl);
-}
-
-void *vmbus_load_req(QEMUFile *f, VMBusDevice *dev, uint32_t size)
-{
-    VMBusChanReqSave req_save;
-    VMBusChanReq *req = NULL;
-    VMBusChannel *chan = NULL;
-    uint32_t i;
-
-    vmstate_load_state(f, &vmstate_vmbus_chan_req, &req_save, 0);
-
-    if (req_save.chan_idx >= dev->num_channels) {
-        error_report("%s: %u(chan_idx) > %u(num_channels)", __func__,
-                     req_save.chan_idx, dev->num_channels);
-        goto out;
-    }
-    chan = &dev->channels[req_save.chan_idx];
-
-    if (vmbus_channel_reserve(chan, 0, req_save.msglen)) {
-        goto out;
-    }
-
-    req = vmbus_alloc_req(chan, size, req_save.pkt_type, req_save.msglen,
-                          req_save.transaction_id, req_save.need_comp);
-    if (req_save.msglen) {
-        memcpy(req->msg, req_save.msg, req_save.msglen);
-    }
-
-    for (i = 0; i < req_save.num; i++) {
-        qemu_sglist_add(&req->sgl, req_save.sgl[i].base, req_save.sgl[i].len);
-    }
-
-out:
-    if (req_save.msglen) {
-        g_free(req_save.msg);
-    }
-    if (req_save.num) {
-        g_free(req_save.sgl);
-    }
-    return req;
-}
-
 static void channel_event_cb(EventNotifier *e)
 {
     VMBusChannel *chan = container_of(e, VMBusChannel, notifier);

include/hw/hyperv/vmbus.h

@@ -223,7 +223,4 @@ int vmbus_map_sgl(VMBusChanReq *req, DMADirection dir, struct iovec *iov,
 void vmbus_unmap_sgl(VMBusChanReq *req, DMADirection dir, struct iovec *iov,
                      unsigned iov_cnt, size_t accessed);
 
-void vmbus_save_req(QEMUFile *f, VMBusChanReq *req);
-void *vmbus_load_req(QEMUFile *f, VMBusDevice *dev, uint32_t size);
-
 #endif