udev/builtins: make skip_subsystem() and skip_virtio() alike

The two functions do not implement identical logic, so they shouldn't
have identical structure, but let's make them both a bit simpler and
more alike.

2 files changed, 7 insertions, 12 deletions

diff --git a/src/udev/udev-builtin-net_id.c b/src/udev/udev-builtin-net_id.c
index 92917852ba..0aede28f7d 100644
--- a/src/udev/udev-builtin-net_id.c
+++ b/src/udev/udev-builtin-net_id.c
@@ -78,25 +78,23 @@ struct virtfn_info {
 
 /* skip intermediate virtio devices */
 static sd_device *skip_virtio(sd_device *dev) {
-        sd_device *parent;
-
         /* there can only ever be one virtio bus per parent device, so we can
          * safely ignore any virtio buses. see
          * http://lists.linuxfoundation.org/pipermail/virtualization/2015-August/030331.html */
-        for (parent = dev; parent; ) {
+        while (dev) {
                 const char *subsystem;
 
-                if (sd_device_get_subsystem(parent, &subsystem) < 0)
+                if (sd_device_get_subsystem(dev, &subsystem) < 0)
                         break;
 
                 if (!streq(subsystem, "virtio"))
                         break;
 
-                if (sd_device_get_parent(parent, &parent) < 0)
+                if (sd_device_get_parent(dev, &dev) < 0)
                         return NULL;
         }
 
-        return parent;
+        return dev;
 }
 
 static int get_virtfn_info(sd_device *dev, struct netnames *names, struct virtfn_info *ret) {
diff --git a/src/udev/udev-builtin-path_id.c b/src/udev/udev-builtin-path_id.c
index effc36f36a..083ce67803 100644
--- a/src/udev/udev-builtin-path_id.c
+++ b/src/udev/udev-builtin-path_id.c
@@ -80,22 +80,19 @@ static int format_lun_number(sd_device *dev, char **path) {
 }
 
 static sd_device *skip_subsystem(sd_device *dev, const char *subsys) {
-        sd_device *parent;
-
         assert(dev);
         assert(subsys);
 
-        for (parent = dev; ; ) {
+        for (;;) {
                 const char *subsystem;
 
-                if (sd_device_get_subsystem(parent, &subsystem) < 0)
+                if (sd_device_get_subsystem(dev, &subsystem) < 0)
                         break;
 
                 if (!streq(subsystem, subsys))
                         break;
 
-                dev = parent;
-                if (sd_device_get_parent(dev, &parent) < 0)
+                if (sd_device_get_parent(dev, &dev) < 0)
                         break;
         }