[Qemu-devel] [PATCHv2] usb: Fix usb-bt-dongle initialization.

[Hani Benhabiles <kroosec@gmail.com>]

Due to an incomplete initialization, adding a usb-bt-dongle device through HMP
or QMP will cause a segmentation fault.

Signed-off-by: Hani Benhabiles <hani@linux.com>
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
---

Compared to v1:
* Remove duplicate code from usb_bt_init() and inline usb_create_simple() call.
* usb_bt_initfn() check for s->hci.

 hw/usb/dev-bluetooth.c | 24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/hw/usb/dev-bluetooth.c b/hw/usb/dev-bluetooth.c
index a9661d2..a76e581 100644
--- a/hw/usb/dev-bluetooth.c
+++ b/hw/usb/dev-bluetooth.c
@@ -19,6 +19,7 @@
  */
 
 #include "qemu-common.h"
+#include "qemu/error-report.h"
 #include "hw/usb.h"
 #include "hw/usb/desc.h"
 #include "sysemu/bt.h"
@@ -506,6 +507,14 @@ static int usb_bt_initfn(USBDevice *dev)
 
     usb_desc_create_serial(dev);
     usb_desc_init(dev);
+    s->dev.opaque = s;
+    if (!s->hci) {
+        s->hci = bt_new_hci(qemu_find_bt_vlan(0));
+    }
+    s->hci->opaque = s;
+    s->hci->evt_recv = usb_bt_out_hci_packet_event;
+    s->hci->acl_recv = usb_bt_out_hci_packet_acl;
+    usb_bt_handle_reset(&s->dev);
     s->intr = usb_ep_get(dev, USB_TOKEN_IN, USB_EVT_EP);
 
     return 0;
@@ -516,6 +525,7 @@ static USBDevice *usb_bt_init(USBBus *bus, const char *cmdline)
     USBDevice *dev;
     struct USBBtState *s;
     HCIInfo *hci;
+    const char *name = "usb-bt-dongle";
 
     if (*cmdline) {
         hci = hci_init(cmdline);
@@ -525,19 +535,17 @@ static USBDevice *usb_bt_init(USBBus *bus, const char *cmdline)
 
     if (!hci)
         return NULL;
-    dev = usb_create_simple(bus, "usb-bt-dongle");
+    dev = usb_create(bus, name);
     if (!dev) {
+        error_report("Failed to create USB device '%s'", name);
         return NULL;
     }
     s = DO_UPCAST(struct USBBtState, dev, dev);
-    s->dev.opaque = s;
-
     s->hci = hci;
-    s->hci->opaque = s;
-    s->hci->evt_recv = usb_bt_out_hci_packet_event;
-    s->hci->acl_recv = usb_bt_out_hci_packet_acl;
-
-    usb_bt_handle_reset(&s->dev);
+    if (qdev_init(&dev->qdev) < 0) {
+        error_report("Failed to initialize USB device '%s'", name);
+        return NULL;
+    }
 
     return dev;
 }
-- 
1.8.3.2