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>

1 files changed, 2 insertions, 3 deletions

diff --git a/util/vfio-helpers.c b/util/vfio-helpers.c
index ddd9a96..e399e33 100644
--- a/util/vfio-helpers.c
+++ b/util/vfio-helpers.c
@@ -21,6 +21,7 @@
 #include "standard-headers/linux/pci_regs.h"
 #include "qemu/event_notifier.h"
 #include "qemu/vfio-helpers.h"
+#include "qemu/lockable.h"
 #include "trace.h"
 
 #define QEMU_VFIO_DEBUG 0
@@ -667,14 +668,12 @@ int qemu_vfio_dma_reset_temporary(QEMUVFIOState *s)
         .size = QEMU_VFIO_IOVA_MAX - s->high_water_mark,
     };
     trace_qemu_vfio_dma_reset_temporary(s);
-    qemu_mutex_lock(&s->lock);
+    QEMU_LOCK_GUARD(&s->lock);
     if (ioctl(s->container, VFIO_IOMMU_UNMAP_DMA, &unmap)) {
         error_report("VFIO_UNMAP_DMA failed: %s", strerror(errno));
-        qemu_mutex_unlock(&s->lock);
         return -errno;
     }
     s->high_water_mark = QEMU_VFIO_IOVA_MAX;
-    qemu_mutex_unlock(&s->lock);
     return 0;
 }