Re: [libvirt] [PATCH v1 12/40] util: mdev: use VIR_AUTOFREE instead of VIR_FREE for scalar types

By making use of GNU C's cleanup attribute handled by the VIR_AUTOFREE macro for declaring scalar variables, majority of the VIR_FREE calls can be dropped, which in turn leads to getting rid of most of our cleanup sections. Signed-off-by: Sukrit Bhatnagar <skrtbhtngr(a)gmail.com&gt; ---

@@ -218,34 +208,30 @@ virMediatedDeviceGetPath(virMediatedDevicePtr dev) char * virMediatedDeviceGetIOMMUGroupDev(const char *uuidstr) { - char *result_path = NULL; - char *iommu_path = NULL; + VIR_AUTOFREE(char *) result_path = NULL; + VIR_AUTOFREE(char *) iommu_path = NULL; + VIR_AUTOFREE(char *) dev_path = virMediatedDeviceGetSysfsPath(uuidstr); char *vfio_path = NULL; - char *dev_path = virMediatedDeviceGetSysfsPath(uuidstr); if (!dev_path) return NULL; if (virAsprintf(&iommu_path, "%s/iommu_group", dev_path) < 0) - goto cleanup; + return NULL; if (!virFileExists(iommu_path)) { virReportSystemError(errno, _("failed to access '%s'"), iommu_path); - goto cleanup; + return NULL; } if (virFileResolveLink(iommu_path, &result_path) < 0) { virReportSystemError(errno, _("failed to resolve '%s'"), iommu_path); - goto cleanup; + return NULL; } if (virAsprintf(&vfio_path, "/dev/vfio/%s", last_component(result_path)) < 0) - goto cleanup; + return vfio_path;