[Qemu-devel] [PULL 2/2] vfio: Use g_new() & friends where that makes obvious sense

[Alex Williamson <alex.williamson@redhat.com>]

From: Markus Armbruster <armbru@redhat.com>

g_new(T, n) is neater than g_malloc(sizeof(T) * n).  It's also safer,
for two reasons.  One, it catches multiplication overflowing size_t.
Two, it returns T * rather than void *, which lets the compiler catch
more type errors.

This commit only touches allocations with size arguments of the form
sizeof(T).  Same Coccinelle semantic patch as in commit b45c03f.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
---
 hw/vfio/pci-quirks.c |   16 ++++++++--------
 hw/vfio/pci.c        |    4 ++--
 hw/vfio/platform.c   |    2 +-
 3 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/hw/vfio/pci-quirks.c b/hw/vfio/pci-quirks.c
index c675d1b..30c68a1 100644
--- a/hw/vfio/pci-quirks.c
+++ b/hw/vfio/pci-quirks.c
@@ -284,7 +284,7 @@ static void vfio_vga_probe_ati_3c3_quirk(VFIOPCIDevice *vdev)
     }
 
     quirk = g_malloc0(sizeof(*quirk));
-    quirk->mem = g_malloc0(sizeof(MemoryRegion));
+    quirk->mem = g_new0(MemoryRegion, 1);
     quirk->nr_mem = 1;
 
     memory_region_init_io(quirk->mem, OBJECT(vdev), &vfio_ati_3c3_quirk, vdev,
@@ -319,7 +319,7 @@ static void vfio_probe_ati_bar4_quirk(VFIOPCIDevice *vdev, int nr)
     }
 
     quirk = g_malloc0(sizeof(*quirk));
-    quirk->mem = g_malloc0(sizeof(MemoryRegion) * 2);
+    quirk->mem = g_new0(MemoryRegion, 2);
     quirk->nr_mem = 2;
     window = quirk->data = g_malloc0(sizeof(*window) +
                                      sizeof(VFIOConfigWindowMatch));
@@ -368,7 +368,7 @@ static void vfio_probe_ati_bar2_quirk(VFIOPCIDevice *vdev, int nr)
 
     quirk = g_malloc0(sizeof(*quirk));
     mirror = quirk->data = g_malloc0(sizeof(*mirror));
-    mirror->mem = quirk->mem = g_malloc0(sizeof(MemoryRegion));
+    mirror->mem = quirk->mem = g_new0(MemoryRegion, 1);
     quirk->nr_mem = 1;
     mirror->vdev = vdev;
     mirror->offset = 0x4000;
@@ -544,7 +544,7 @@ static void vfio_vga_probe_nvidia_3d0_quirk(VFIOPCIDevice *vdev)
 
     quirk = g_malloc0(sizeof(*quirk));
     quirk->data = data = g_malloc0(sizeof(*data));
-    quirk->mem = g_malloc0(sizeof(MemoryRegion) * 2);
+    quirk->mem = g_new0(MemoryRegion, 2);
     quirk->nr_mem = 2;
     data->vdev = vdev;
 
@@ -661,7 +661,7 @@ static void vfio_probe_nvidia_bar5_quirk(VFIOPCIDevice *vdev, int nr)
     }
 
     quirk = g_malloc0(sizeof(*quirk));
-    quirk->mem = g_malloc0(sizeof(MemoryRegion) * 4);
+    quirk->mem = g_new0(MemoryRegion, 4);
     quirk->nr_mem = 4;
     bar5 = quirk->data = g_malloc0(sizeof(*bar5) +
                                    (sizeof(VFIOConfigWindowMatch) * 2));
@@ -756,7 +756,7 @@ static void vfio_probe_nvidia_bar0_quirk(VFIOPCIDevice *vdev, int nr)
 
     quirk = g_malloc0(sizeof(*quirk));
     mirror = quirk->data = g_malloc0(sizeof(*mirror));
-    mirror->mem = quirk->mem = g_malloc0(sizeof(MemoryRegion));
+    mirror->mem = quirk->mem = g_new0(MemoryRegion, 1);
     quirk->nr_mem = 1;
     mirror->vdev = vdev;
     mirror->offset = 0x88000;
@@ -775,7 +775,7 @@ static void vfio_probe_nvidia_bar0_quirk(VFIOPCIDevice *vdev, int nr)
     if (vdev->has_vga) {
         quirk = g_malloc0(sizeof(*quirk));
         mirror = quirk->data = g_malloc0(sizeof(*mirror));
-        mirror->mem = quirk->mem = g_malloc0(sizeof(MemoryRegion));
+        mirror->mem = quirk->mem = g_new0(MemoryRegion, 1);
         quirk->nr_mem = 1;
         mirror->vdev = vdev;
         mirror->offset = 0x1800;
@@ -938,7 +938,7 @@ static void vfio_probe_rtl8168_bar2_quirk(VFIOPCIDevice *vdev, int nr)
     }
 
     quirk = g_malloc0(sizeof(*quirk));
-    quirk->mem = g_malloc0(sizeof(MemoryRegion) * 2);
+    quirk->mem = g_new0(MemoryRegion, 2);
     quirk->nr_mem = 2;
     quirk->data = rtl = g_malloc0(sizeof(*rtl));
     rtl->vdev = vdev;
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index 035007f..1fb868c 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -587,7 +587,7 @@ static void vfio_msix_enable(VFIOPCIDevice *vdev)
 {
     vfio_disable_interrupts(vdev);
 
-    vdev->msi_vectors = g_malloc0(vdev->msix->entries * sizeof(VFIOMSIVector));
+    vdev->msi_vectors = g_new0(VFIOMSIVector, vdev->msix->entries);
 
     vdev->interrupt = VFIO_INT_MSIX;
 
@@ -623,7 +623,7 @@ static void vfio_msi_enable(VFIOPCIDevice *vdev)
 
     vdev->nr_vectors = msi_nr_vectors_allocated(&vdev->pdev);
 retry:
-    vdev->msi_vectors = g_malloc0(vdev->nr_vectors * sizeof(VFIOMSIVector));
+    vdev->msi_vectors = g_new0(VFIOMSIVector, vdev->nr_vectors);
 
     for (i = 0; i < vdev->nr_vectors; i++) {
         VFIOMSIVector *vector = &vdev->msi_vectors[i];
diff --git a/hw/vfio/platform.c b/hw/vfio/platform.c
index 5c1156c..289b498 100644
--- a/hw/vfio/platform.c
+++ b/hw/vfio/platform.c
@@ -478,7 +478,7 @@ static int vfio_populate_device(VFIODevice *vbasedev)
         struct vfio_region_info reg_info = { .argsz = sizeof(reg_info) };
         VFIORegion *ptr;
 
-        vdev->regions[i] = g_malloc0(sizeof(VFIORegion));
+        vdev->regions[i] = g_new0(VFIORegion, 1);
         ptr = vdev->regions[i];
         reg_info.index = i;
         ret = ioctl(vbasedev->fd, VFIO_DEVICE_GET_REGION_INFO, &reg_info);