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From: "Michael S. Tsirkin" <mst@redhat.com>
To: qemu-devel@nongnu.org
Cc: Paolo Bonzini <pbonzini@redhat.com>
Subject: [Qemu-devel] [PULL 15/19] qdev: allow both pre- and post-order vists in qdev walking functions
Date: Mon, 23 Dec 2013 18:12:12 +0200	[thread overview]
Message-ID: <1387815007-1272-16-git-send-email-mst@redhat.com> (raw)
In-Reply-To: <1387815007-1272-1-git-send-email-mst@redhat.com>

From: Paolo Bonzini <pbonzini@redhat.com>

Resetting should be done in post-order, not pre-order.  However,
qdev_walk_children and qbus_walk_children do not allow this.  Fix
it by adding two extra arguments to the functions.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/hw/qdev-core.h | 13 +++++++++----
 hw/core/qdev.c         | 45 +++++++++++++++++++++++++++++++++------------
 2 files changed, 42 insertions(+), 16 deletions(-)

diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h
index f2043a6..ecf5cb3 100644
--- a/include/hw/qdev-core.h
+++ b/include/hw/qdev-core.h
@@ -253,10 +253,15 @@ BusState *qbus_create(const char *typename, DeviceState *parent, const char *nam
 /* Returns > 0 if either devfn or busfn skip walk somewhere in cursion,
  *         < 0 if either devfn or busfn terminate walk somewhere in cursion,
  *           0 otherwise. */
-int qbus_walk_children(BusState *bus, qdev_walkerfn *devfn,
-                       qbus_walkerfn *busfn, void *opaque);
-int qdev_walk_children(DeviceState *dev, qdev_walkerfn *devfn,
-                       qbus_walkerfn *busfn, void *opaque);
+int qbus_walk_children(BusState *bus,
+                       qdev_walkerfn *pre_devfn, qbus_walkerfn *pre_busfn,
+                       qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn,
+                       void *opaque);
+int qdev_walk_children(DeviceState *dev,
+                       qdev_walkerfn *pre_devfn, qbus_walkerfn *pre_busfn,
+                       qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn,
+                       void *opaque);
+
 void qdev_reset_all(DeviceState *dev);
 
 /**
diff --git a/hw/core/qdev.c b/hw/core/qdev.c
index e374a93..5ddf1aa 100644
--- a/hw/core/qdev.c
+++ b/hw/core/qdev.c
@@ -240,12 +240,12 @@ static int qbus_reset_one(BusState *bus, void *opaque)
 
 void qdev_reset_all(DeviceState *dev)
 {
-    qdev_walk_children(dev, qdev_reset_one, qbus_reset_one, NULL);
+    qdev_walk_children(dev, qdev_reset_one, qbus_reset_one, NULL, NULL, NULL);
 }
 
 void qbus_reset_all(BusState *bus)
 {
-    qbus_walk_children(bus, qdev_reset_one, qbus_reset_one, NULL);
+    qbus_walk_children(bus, qdev_reset_one, qbus_reset_one, NULL, NULL, NULL);
 }
 
 void qbus_reset_all_fn(void *opaque)
@@ -337,49 +337,70 @@ BusState *qdev_get_child_bus(DeviceState *dev, const char *name)
     return NULL;
 }
 
-int qbus_walk_children(BusState *bus, qdev_walkerfn *devfn,
-                       qbus_walkerfn *busfn, void *opaque)
+int qbus_walk_children(BusState *bus,
+                       qdev_walkerfn *pre_devfn, qbus_walkerfn *pre_busfn,
+                       qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn,
+                       void *opaque)
 {
     BusChild *kid;
     int err;
 
-    if (busfn) {
-        err = busfn(bus, opaque);
+    if (pre_busfn) {
+        err = pre_busfn(bus, opaque);
         if (err) {
             return err;
         }
     }
 
     QTAILQ_FOREACH(kid, &bus->children, sibling) {
-        err = qdev_walk_children(kid->child, devfn, busfn, opaque);
+        err = qdev_walk_children(kid->child,
+                                 pre_devfn, pre_busfn,
+                                 post_devfn, post_busfn, opaque);
         if (err < 0) {
             return err;
         }
     }
 
+    if (post_busfn) {
+        err = post_busfn(bus, opaque);
+        if (err) {
+            return err;
+        }
+    }
+
     return 0;
 }
 
-int qdev_walk_children(DeviceState *dev, qdev_walkerfn *devfn,
-                       qbus_walkerfn *busfn, void *opaque)
+int qdev_walk_children(DeviceState *dev,
+                       qdev_walkerfn *pre_devfn, qbus_walkerfn *pre_busfn,
+                       qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn,
+                       void *opaque)
 {
     BusState *bus;
     int err;
 
-    if (devfn) {
-        err = devfn(dev, opaque);
+    if (pre_devfn) {
+        err = pre_devfn(dev, opaque);
         if (err) {
             return err;
         }
     }
 
     QLIST_FOREACH(bus, &dev->child_bus, sibling) {
-        err = qbus_walk_children(bus, devfn, busfn, opaque);
+        err = qbus_walk_children(bus, pre_devfn, pre_busfn,
+                                 post_devfn, post_busfn, opaque);
         if (err < 0) {
             return err;
         }
     }
 
+    if (post_devfn) {
+        err = post_devfn(dev, opaque);
+        if (err) {
+            return err;
+        }
+    }
+
     return 0;
 }
 
-- 
MST

  parent reply	other threads:[~2013-12-23 16:08 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-12-23 16:11 [Qemu-devel] [PULL 00/19] acpi, pci, pc, fedora, virtio fixes and enhancements Michael S. Tsirkin
2013-12-23 16:11 ` [Qemu-devel] [PULL 01/19] piix: gigabyte alignment for ram Michael S. Tsirkin
2013-12-23 16:11 ` [Qemu-devel] [PULL 02/19] pc_piix: document gigabyte_align Michael S. Tsirkin
2013-12-23 16:11 ` [Qemu-devel] [PULL 03/19] hw/i386/pc_sysfw: support two flash drives Michael S. Tsirkin
2013-12-23 16:11 ` [Qemu-devel] [PULL 04/19] i440fx-test: qtest_start() should be paired with qtest_end() Michael S. Tsirkin
2013-12-23 16:11 ` [Qemu-devel] [PULL 05/19] i440fx-test: give each GTest case its own qtest Michael S. Tsirkin
2013-12-23 16:11 ` [Qemu-devel] [PULL 06/19] i440fx-test: generate temporary firmware blob Michael S. Tsirkin
2013-12-23 16:11 ` [Qemu-devel] [PULL 07/19] i440fx-test: verify firmware under 4G and 1M, both -bios and -pflash Michael S. Tsirkin
2013-12-23 16:11 ` [Qemu-devel] [PULL 08/19] acpi: piix4: remove not needed GPE0 mask Michael S. Tsirkin
2013-12-23 16:11 ` [Qemu-devel] [PULL 09/19] acpi: factor out common pm_update_sci() into acpi core Michael S. Tsirkin
2013-12-23 16:12 ` [Qemu-devel] [PULL 10/19] acpi: ich9: allow guest to clear SCI rised by GPE Michael S. Tsirkin
2013-12-23 16:12 ` [Qemu-devel] [PULL 11/19] ACPI: Q35 DSDT: fix CPU hotplug GPE0.2 handler Michael S. Tsirkin
2013-12-23 16:12 ` [Qemu-devel] [PULL 12/19] ACPI/DSDT-CPU: cleanup bogus comment Michael S. Tsirkin
2013-12-23 16:12 ` [Qemu-devel] [PULL 13/19] pci: do not export pci_bus_reset Michael S. Tsirkin
2013-12-23 16:12 ` [Qemu-devel] [PULL 14/19] pci: clean up resetting of IRQs Michael S. Tsirkin
2013-12-23 16:12 ` Michael S. Tsirkin [this message]
2013-12-23 16:12 ` [Qemu-devel] [PULL 16/19] qdev: switch reset to post-order Michael S. Tsirkin
2013-12-23 16:12 ` [Qemu-devel] [PULL 17/19] piix: fix 32bit pci hole Michael S. Tsirkin
2013-12-23 16:12 ` [Qemu-devel] [PULL 18/19] virtio: add back call to virtio_bus_device_unplugged Michael S. Tsirkin
2013-12-23 16:12 ` [Qemu-devel] [PULL 19/19] target-arm: fix build with gcc 4.8.2 Michael S. Tsirkin

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