[Qemu-block] [PATCH] iscsi: use scsi_create_task()

[Marc-André Lureau]

The function does the same initialization, and matches with
scsi_free_scsi_task() usage, and qemu doesn't need to know the
allocator details.

Signed-off-by: Marc-André Lureau <address@hidden>
---
 block/iscsi.c | 27 ++++++++++++---------------
 1 file changed, 12 insertions(+), 15 deletions(-)

diff --git a/block/iscsi.c b/block/iscsi.c
index 5daa201181..a6bcd8eb13 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -1013,6 +1013,7 @@ static BlockAIOCB *iscsi_aio_ioctl(BlockDriverState *bs,
     struct iscsi_context *iscsi = iscsilun->iscsi;
     struct iscsi_data data;
     IscsiAIOCB *acb;
+    int xfer_dir;
 
     acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque);
 
@@ -1034,30 +1035,26 @@ static BlockAIOCB *iscsi_aio_ioctl(BlockDriverState *bs,
         return NULL;
     }
 
-    acb->task = malloc(sizeof(struct scsi_task));
-    if (acb->task == NULL) {
-        error_report("iSCSI: Failed to allocate task for scsi command. %s",
-                     iscsi_get_error(iscsi));
-        qemu_aio_unref(acb);
-        return NULL;
-    }
-    memset(acb->task, 0, sizeof(struct scsi_task));
-
     switch (acb->ioh->dxfer_direction) {
     case SG_DXFER_TO_DEV:
-        acb->task->xfer_dir = SCSI_XFER_WRITE;
+        xfer_dir = SCSI_XFER_WRITE;
         break;
     case SG_DXFER_FROM_DEV:
-        acb->task->xfer_dir = SCSI_XFER_READ;
+        xfer_dir = SCSI_XFER_READ;
         break;
     default:
-        acb->task->xfer_dir = SCSI_XFER_NONE;
+        xfer_dir = SCSI_XFER_NONE;
         break;
     }
 
-    acb->task->cdb_size = acb->ioh->cmd_len;
-    memcpy(&acb->task->cdb[0], acb->ioh->cmdp, acb->ioh->cmd_len);
-    acb->task->expxferlen = acb->ioh->dxfer_len;
+    acb->task = scsi_create_task(acb->ioh->cmd_len, acb->ioh->cmdp,
+                                 xfer_dir, acb->ioh->dxfer_len);
+    if (acb->task == NULL) {
+        error_report("iSCSI: Failed to allocate task for scsi command. %s",
+                     iscsi_get_error(iscsi));
+        qemu_aio_unref(acb);
+        return NULL;
+    }
 
     data.size = 0;
     qemu_mutex_lock(&iscsilun->mutex);
-- 
2.13.0.91.g00982b8dd