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author | Alexey Kardashevskiy <aik@ozlabs.ru> | 2014-05-30 13:03:21 -0600 |
---|---|---|
committer | Alex Williamson <alex.williamson@redhat.com> | 2014-05-30 13:03:21 -0600 |
commit | 279a35ab4a8515d1eac06a76547d4b65a6cde519 (patch) | |
tree | e07f23b9d71375b8b764c1094eb3bd4a1afe3b5b /hw/misc | |
parent | 7532d3cbf148f72c9476484223b94a188ab59706 (diff) | |
download | qemu-279a35ab4a8515d1eac06a76547d4b65a6cde519.zip qemu-279a35ab4a8515d1eac06a76547d4b65a6cde519.tar.gz qemu-279a35ab4a8515d1eac06a76547d4b65a6cde519.tar.bz2 |
vfio: Rework to have error paths
This reworks vfio_connect_container() and vfio_get_group() to have
common exit path at the end of the function bodies.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'hw/misc')
-rw-r--r-- | hw/misc/vfio.c | 58 |
1 files changed, 32 insertions, 26 deletions
diff --git a/hw/misc/vfio.c b/hw/misc/vfio.c index 0d4594e..cba0ac1 100644 --- a/hw/misc/vfio.c +++ b/hw/misc/vfio.c @@ -3448,8 +3448,8 @@ static int vfio_connect_container(VFIOGroup *group) if (ret != VFIO_API_VERSION) { error_report("vfio: supported vfio version: %d, " "reported version: %d", VFIO_API_VERSION, ret); - close(fd); - return -EINVAL; + ret = -EINVAL; + goto close_fd_exit; } container = g_malloc0(sizeof(*container)); @@ -3459,17 +3459,15 @@ static int vfio_connect_container(VFIOGroup *group) ret = ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &fd); if (ret) { error_report("vfio: failed to set group container: %m"); - g_free(container); - close(fd); - return -errno; + ret = -errno; + goto free_container_exit; } ret = ioctl(fd, VFIO_SET_IOMMU, VFIO_TYPE1_IOMMU); if (ret) { error_report("vfio: failed to set iommu for container: %m"); - g_free(container); - close(fd); - return -errno; + ret = -errno; + goto free_container_exit; } container->iommu_data.type1.listener = vfio_memory_listener; @@ -3480,20 +3478,16 @@ static int vfio_connect_container(VFIOGroup *group) if (container->iommu_data.type1.error) { ret = container->iommu_data.type1.error; - vfio_listener_release(container); - g_free(container); - close(fd); error_report("vfio: memory listener initialization failed for container"); - return ret; + goto listener_release_exit; } container->iommu_data.type1.initialized = true; } else { error_report("vfio: No available IOMMU models"); - g_free(container); - close(fd); - return -EINVAL; + ret = -EINVAL; + goto free_container_exit; } QLIST_INIT(&container->group_list); @@ -3503,6 +3497,17 @@ static int vfio_connect_container(VFIOGroup *group) QLIST_INSERT_HEAD(&container->group_list, group, container_next); return 0; + +listener_release_exit: + vfio_listener_release(container); + +free_container_exit: + g_free(container); + +close_fd_exit: + close(fd); + + return ret; } static void vfio_disconnect_container(VFIOGroup *group) @@ -3546,24 +3551,19 @@ static VFIOGroup *vfio_get_group(int groupid) group->fd = qemu_open(path, O_RDWR); if (group->fd < 0) { error_report("vfio: error opening %s: %m", path); - g_free(group); - return NULL; + goto free_group_exit; } if (ioctl(group->fd, VFIO_GROUP_GET_STATUS, &status)) { error_report("vfio: error getting group status: %m"); - close(group->fd); - g_free(group); - return NULL; + goto close_fd_exit; } if (!(status.flags & VFIO_GROUP_FLAGS_VIABLE)) { error_report("vfio: error, group %d is not viable, please ensure " "all devices within the iommu_group are bound to their " "vfio bus driver.", groupid); - close(group->fd); - g_free(group); - return NULL; + goto close_fd_exit; } group->groupid = groupid; @@ -3571,9 +3571,7 @@ static VFIOGroup *vfio_get_group(int groupid) if (vfio_connect_container(group)) { error_report("vfio: failed to setup container for group %d", groupid); - close(group->fd); - g_free(group); - return NULL; + goto close_fd_exit; } if (QLIST_EMPTY(&group_list)) { @@ -3585,6 +3583,14 @@ static VFIOGroup *vfio_get_group(int groupid) vfio_kvm_device_add_group(group); return group; + +close_fd_exit: + close(group->fd); + +free_group_exit: + g_free(group); + + return NULL; } static void vfio_put_group(VFIOGroup *group) |