1 files changed, 3 insertions, 2 deletions
diff --git a/dma-helpers.c b/dma-helpers.c
index 35cb500..433d8b2 100644
--- a/dma-helpers.c
+++ b/dma-helpers.c
@@ -24,8 +24,8 @@ static void do_dma_memory_set(dma_addr_t addr, uint8_t c, dma_addr_t len)
     while (len > 0) {
         l = len < FILLBUF_SIZE ? len : FILLBUF_SIZE;
         cpu_physical_memory_rw(addr, fillbuf, l, true);
-        len -= len;
-        addr += len;
+        len -= l;
+        addr += l;
     }
 }
 
@@ -65,6 +65,7 @@ void qemu_sglist_add(QEMUSGList *qsg, dma_addr_t base, dma_addr_t len)
 void qemu_sglist_destroy(QEMUSGList *qsg)
 {
     g_free(qsg->sg);
+    memset(qsg, 0, sizeof(*qsg));
 }
 
 typedef struct {