[PATCH v3 15/25] VFIO: Fix error_append_hint usage

[Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>]

If we want append hint to errp, we must use ERRP_FUNCTION_BEGIN macro.
Otherwise hint will not be appended in case of errp == &fatal_err
(program will exit before error_append_hint() call). Fix such cases.

This commit (together with its neighbors) was generated by

git grep -l 'error_append_hint(errp' | while read f; do \
spatch --sp-file scripts/coccinelle/fix-error_append_hint-usage.cocci \
--in-place $f; done

and then

./python/commit-per-subsystem.py MAINTAINERS "$(< auto-msg)"

(auto-msg was a file with this commit message)

Still, for backporting it may be more comfortable to use only the first
command and then do one huge commit.

Reported-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
 hw/vfio/common.c | 2 ++
 hw/vfio/pci.c    | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index 3e03c495d8..d08276b1e6 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -1437,6 +1437,7 @@ static void vfio_disconnect_container(VFIOGroup *group)
 
 VFIOGroup *vfio_get_group(int groupid, AddressSpace *as, Error **errp)
 {
+    ERRP_FUNCTION_BEGIN();
     VFIOGroup *group;
     char path[32];
     struct vfio_group_status status = { .argsz = sizeof(status) };
@@ -1526,6 +1527,7 @@ void vfio_put_group(VFIOGroup *group)
 int vfio_get_device(VFIOGroup *group, const char *name,
                     VFIODevice *vbasedev, Error **errp)
 {
+    ERRP_FUNCTION_BEGIN();
     struct vfio_device_info dev_info = { .argsz = sizeof(dev_info) };
     int ret, fd;
 
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index c5e6fe61cb..57208c7075 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -2469,6 +2469,7 @@ int vfio_populate_vga(VFIOPCIDevice *vdev, Error **errp)
 
 static void vfio_populate_device(VFIOPCIDevice *vdev, Error **errp)
 {
+    ERRP_FUNCTION_BEGIN();
     VFIODevice *vbasedev = &vdev->vbasedev;
     struct vfio_region_info *reg_info;
     struct vfio_irq_info irq_info = { .argsz = sizeof(irq_info) };
@@ -2700,6 +2701,7 @@ static void vfio_unregister_req_notifier(VFIOPCIDevice *vdev)
 
 static void vfio_realize(PCIDevice *pdev, Error **errp)
 {
+    ERRP_FUNCTION_BEGIN();
     VFIOPCIDevice *vdev = PCI_VFIO(pdev);
     VFIODevice *vbasedev_iter;
     VFIOGroup *group;
-- 
2.21.0