[Qemu-devel] [RFC PATCH v2 1/2] VFIO: Drop vfio_container_do_ioctl()

[Gavin Shan <gwshan@linux.vnet.ibm.com>]

The patch drops vfio_container_do_ioctl() and merges its logic to
parent function call vfio_container_ioctl() so that the subsequent
patches can reused the found VFIO group in vfio_container_ioctl().

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
---
 hw/misc/vfio.c | 33 +++++++++++++++------------------
 1 file changed, 15 insertions(+), 18 deletions(-)

diff --git a/hw/misc/vfio.c b/hw/misc/vfio.c
index 7d5f1bb..1a3e7eb 100644
--- a/hw/misc/vfio.c
+++ b/hw/misc/vfio.c
@@ -4419,8 +4419,8 @@ static void register_vfio_pci_dev_type(void)
 
 type_init(register_vfio_pci_dev_type)
 
-static int vfio_container_do_ioctl(AddressSpace *as, int32_t groupid,
-                                   int req, void *param)
+int vfio_container_ioctl(AddressSpace *as, int32_t groupid,
+                         int req, void *param)
 {
     VFIOGroup *group;
     VFIOContainer *container;
@@ -4433,22 +4433,11 @@ static int vfio_container_do_ioctl(AddressSpace *as, int32_t groupid,
     }
 
     container = group->container;
-    if (group->container) {
-        ret = ioctl(container->fd, req, param);
-        if (ret < 0) {
-            error_report("vfio: failed to ioctl container: ret=%d, %s",
-                         ret, strerror(errno));
-        }
+    if (!container) {
+        error_report("vfio: no container for group %d\n", groupid);
+        goto out;
     }
 
-    vfio_put_group(group);
-
-    return ret;
-}
-
-int vfio_container_ioctl(AddressSpace *as, int32_t groupid,
-                         int req, void *param)
-{
     /* We allow only certain ioctls to the container */
     switch (req) {
     case VFIO_CHECK_EXTENSION:
@@ -4458,8 +4447,16 @@ int vfio_container_ioctl(AddressSpace *as, int32_t groupid,
     default:
         /* Return an error on unknown requests */
         error_report("vfio: unsupported ioctl %X", req);
-        return -1;
+        goto out;
     }
 
-    return vfio_container_do_ioctl(as, groupid, req, param);
+    ret = ioctl(container->fd, req, param);
+    if (ret < 0) {
+        error_report("vfio: failed to ioctl container: ret=%d, %s",
+                     ret, strerror(errno));
+    }
+
+out:
+    vfio_put_group(group);
+    return ret;
 }
-- 
1.8.3.2