commit f487b677c2dc15786dbe7c61326cc49e7c64daea
author Paolo Bonzini <pbonzini@redhat.com> Mon Jun 03 14:17:19 2013 +0200
committer Paolo Bonzini <pbonzini@redhat.com> Thu Jul 04 17:42:30 2013 +0200
tree fedfbfc9a8476c8d76b8723a22e6dc0e4430bda3
parent cac3c384bb986f06a308e551641284586924813c

dma: keep a device alive while it has SGLists

Reviewed-by: Anthony Liguori <aliguori@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

dma-helpers.c

diff --git a/dma-helpers.c b/dma-helpers.c
index 5afba47..499550f 100644
--- a/dma-helpers.c
+++ b/dma-helpers.c
@@ -34,13 +34,16 @@
     return error;
 }
 
-void qemu_sglist_init(QEMUSGList *qsg, int alloc_hint, AddressSpace *as)
+void qemu_sglist_init(QEMUSGList *qsg, DeviceState *dev, int alloc_hint,
+                      AddressSpace *as)
 {
     qsg->sg = g_malloc(alloc_hint * sizeof(ScatterGatherEntry));
     qsg->nsg = 0;
     qsg->nalloc = alloc_hint;
     qsg->size = 0;
     qsg->as = as;
+    qsg->dev = dev;
+    object_ref(OBJECT(dev));
 }
 
 void qemu_sglist_add(QEMUSGList *qsg, dma_addr_t base, dma_addr_t len)
@@ -57,6 +60,7 @@
 
 void qemu_sglist_destroy(QEMUSGList *qsg)
 {
+    object_unref(OBJECT(qsg->dev));
     g_free(qsg->sg);
     memset(qsg, 0, sizeof(*qsg));
 }