lockable: replaced locks with lock guard macros where appropriate

- ran regexp "qemu_mutex_lock\(.*\).*\n.*if" to find targets
- replaced result with QEMU_LOCK_GUARD if all unlocks at function end
- replaced result with WITH_QEMU_LOCK_GUARD if unlock not at end

Signed-off-by: Daniel Brodsky <dnbrdsky@gmail.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-id: 20200404042108.389635-3-dnbrdsky@gmail.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

2 files changed, 22 insertions, 26 deletions

diff --git a/hw/display/qxl.c b/hw/display/qxl.c
index 227da69a50..d5627119ec 100644
--- a/hw/display/qxl.c
+++ b/hw/display/qxl.c
@@ -478,18 +478,19 @@ static int qxl_track_command(PCIQXLDevice *qxl, struct QXLCommandExt *ext)
                               cmd->u.surface_create.stride);
             return 1;
         }
-        qemu_mutex_lock(&qxl->track_lock);
-        if (cmd->type == QXL_SURFACE_CMD_CREATE) {
-            qxl->guest_surfaces.cmds[id] = ext->cmd.data;
-            qxl->guest_surfaces.count++;
-            if (qxl->guest_surfaces.max < qxl->guest_surfaces.count)
-                qxl->guest_surfaces.max = qxl->guest_surfaces.count;
-        }
-        if (cmd->type == QXL_SURFACE_CMD_DESTROY) {
-            qxl->guest_surfaces.cmds[id] = 0;
-            qxl->guest_surfaces.count--;
+        WITH_QEMU_LOCK_GUARD(&qxl->track_lock) {
+            if (cmd->type == QXL_SURFACE_CMD_CREATE) {
+                qxl->guest_surfaces.cmds[id] = ext->cmd.data;
+                qxl->guest_surfaces.count++;
+                if (qxl->guest_surfaces.max < qxl->guest_surfaces.count) {
+                    qxl->guest_surfaces.max = qxl->guest_surfaces.count;
+                }
+            }
+            if (cmd->type == QXL_SURFACE_CMD_DESTROY) {
+                qxl->guest_surfaces.cmds[id] = 0;
+                qxl->guest_surfaces.count--;
+            }
         }
-        qemu_mutex_unlock(&qxl->track_lock);
         break;
     }
     case QXL_CMD_CURSOR:
@@ -958,10 +959,9 @@ static void interface_update_area_complete(QXLInstance *sin,
     int i;
     int qxl_i;
 
-    qemu_mutex_lock(&qxl->ssd.lock);
+    QEMU_LOCK_GUARD(&qxl->ssd.lock);
     if (surface_id != 0 || !num_updated_rects ||
         !qxl->render_update_cookie_num) {
-        qemu_mutex_unlock(&qxl->ssd.lock);
         return;
     }
     trace_qxl_interface_update_area_complete(qxl->id, surface_id, dirty->left,
@@ -980,7 +980,6 @@ static void interface_update_area_complete(QXLInstance *sin,
          * Don't bother copying or scheduling the bh since we will flip
          * the whole area anyway on completion of the update_area async call
          */
-        qemu_mutex_unlock(&qxl->ssd.lock);
         return;
     }
     qxl_i = qxl->num_dirty_rects;
@@ -991,7 +990,6 @@ static void interface_update_area_complete(QXLInstance *sin,
     trace_qxl_interface_update_area_complete_schedule_bh(qxl->id,
                                                          qxl->num_dirty_rects);
     qemu_bh_schedule(qxl->update_area_bh);
-    qemu_mutex_unlock(&qxl->ssd.lock);
 }
 
 /* called from spice server thread context only */
@@ -1694,15 +1692,14 @@ static void ioport_write(void *opaque, hwaddr addr,
     case QXL_IO_MONITORS_CONFIG_ASYNC:
 async_common:
         async = QXL_ASYNC;
-        qemu_mutex_lock(&d->async_lock);
-        if (d->current_async != QXL_UNDEFINED_IO) {
-            qxl_set_guest_bug(d, "%d async started before last (%d) complete",
-                io_port, d->current_async);
-            qemu_mutex_unlock(&d->async_lock);
-            return;
+        WITH_QEMU_LOCK_GUARD(&d->async_lock) {
+            if (d->current_async != QXL_UNDEFINED_IO) {
+                qxl_set_guest_bug(d, "%d async started before last (%d) complete",
+                    io_port, d->current_async);
+                return;
+            }
+            d->current_async = orig_io_port;
         }
-        d->current_async = orig_io_port;
-        qemu_mutex_unlock(&d->async_lock);
         break;
     default:
         break;
diff --git a/hw/vfio/platform.c b/hw/vfio/platform.c
index 6b2952c034..ac2cefc9b1 100644
--- a/hw/vfio/platform.c
+++ b/hw/vfio/platform.c
@@ -22,6 +22,7 @@
 #include "hw/vfio/vfio-platform.h"
 #include "migration/vmstate.h"
 #include "qemu/error-report.h"
+#include "qemu/lockable.h"
 #include "qemu/main-loop.h"
 #include "qemu/module.h"
 #include "qemu/range.h"
@@ -216,7 +217,7 @@ static void vfio_intp_interrupt(VFIOINTp *intp)
     VFIOPlatformDevice *vdev = intp->vdev;
     bool delay_handling = false;
 
-    qemu_mutex_lock(&vdev->intp_mutex);
+    QEMU_LOCK_GUARD(&vdev->intp_mutex);
     if (intp->state == VFIO_IRQ_INACTIVE) {
         QLIST_FOREACH(tmp, &vdev->intp_list, next) {
             if (tmp->state == VFIO_IRQ_ACTIVE ||
@@ -236,7 +237,6 @@ static void vfio_intp_interrupt(VFIOINTp *intp)
         QSIMPLEQ_INSERT_TAIL(&vdev->pending_intp_queue,
                              intp, pqnext);
         ret = event_notifier_test_and_clear(intp->interrupt);
-        qemu_mutex_unlock(&vdev->intp_mutex);
         return;
     }
 
@@ -266,7 +266,6 @@ static void vfio_intp_interrupt(VFIOINTp *intp)
                   qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +
                       vdev->mmap_timeout);
     }
-    qemu_mutex_unlock(&vdev->intp_mutex);
 }
 
 /**