scsi-disk: fix compilation with DEBUG_SCSI

Reported-by: NGerhard Wiesinger <lists@wiesinger.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

hw/scsi-disk.c

@@ -447,7 +447,7 @@ static void scsi_write_complete(void * opaque, int ret)
         return;
     } else {
         scsi_init_iovec(r, SCSI_DMA_BUF_SIZE);
-        DPRINTF("Write complete tag=0x%x more=%d\n", r->req.tag, r->qiov.size);
+        DPRINTF("Write complete tag=0x%x more=%zd\n", r->req.tag, r->qiov.size);
         scsi_req_data(&r->req, r->qiov.size);
     }
 
@@ -1277,7 +1277,7 @@ static void scsi_disk_emulate_read_data(SCSIRequest *req)
     int buflen = r->iov.iov_len;
 
     if (buflen) {
-        DPRINTF("Read buf_len=%zd\n", buflen);
+        DPRINTF("Read buf_len=%d\n", buflen);
         r->iov.iov_len = 0;
         r->started = true;
         scsi_req_data(&r->req, buflen);
@@ -1455,7 +1455,7 @@ static void scsi_disk_emulate_write_data(SCSIRequest *req)
 
     if (r->iov.iov_len) {
         int buflen = r->iov.iov_len;
-        DPRINTF("Write buf_len=%zd\n", buflen);
+        DPRINTF("Write buf_len=%d\n", buflen);
         r->iov.iov_len = 0;
         scsi_req_data(&r->req, buflen);
         return;
@@ -2093,23 +2093,24 @@ static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun,
     const SCSIReqOps *ops;
     uint8_t command;
 
+    command = buf[0];
+    ops = scsi_disk_reqops_dispatch[command];
+    if (!ops) {
+        ops = &scsi_disk_emulate_reqops;
+    }
+    req = scsi_req_alloc(ops, &s->qdev, tag, lun, hba_private);
+
 #ifdef DEBUG_SCSI
-    DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", lun, buf[0]);
+    DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", lun, tag, buf[0]);
     {
         int i;
-        for (i = 1; i < r->req.cmd.len; i++) {
+        for (i = 1; i < req->cmd.len; i++) {
             printf(" 0x%02x", buf[i]);
         }
         printf("\n");
     }
 #endif
 
-    command = buf[0];
-    ops = scsi_disk_reqops_dispatch[command];
-    if (!ops) {
-        ops = &scsi_disk_emulate_reqops;
-    }
-    req = scsi_req_alloc(ops, &s->qdev, tag, lun, hba_private);
     return req;
 }