scsi: move request lists to QTAILQ.

Changes:
 * Move from open-coded lists to QTAILQ macros.
 * Move the struct elements to the common data structures
   (SCSIDevice + SCSIRequest).
 * Drop free request pools.
 * Fix request cleanup in the destroy callback.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/hw/scsi.h b/hw/scsi.h
index 7906877..a9b846c 100644
--- a/hw/scsi.h
+++ b/hw/scsi.h
@@ -21,6 +21,7 @@ typedef struct SCSIRequest {
     SCSIDevice        *dev;
     uint32_t          tag;
     BlockDriverAIOCB  *aiocb;
+    QTAILQ_ENTRY(SCSIRequest) next;
 } SCSIRequest;
 
 struct SCSIDevice
@@ -28,6 +29,7 @@ struct SCSIDevice
     DeviceState qdev;
     uint32_t id;
     SCSIDeviceInfo *info;
+    QTAILQ_HEAD(, SCSIRequest) requests;
 };
 
 /* cdrom.c */