vgimportdevices: fix locking when creating devices file

Take the devices file lock before creating a new devices file.
(Was missed by the change to preemptively create the devices
file prior to setup_devices(), which was done to improve the
error path.)

2 files changed, 4 insertions, 4 deletions

diff --git a/lib/device/dev-cache.c b/lib/device/dev-cache.c
index 193eb7585..85f9b499a 100644
--- a/lib/device/dev-cache.c
+++ b/lib/device/dev-cache.c
@@ -1937,10 +1937,9 @@ int setup_devices(struct cmd_context *cmd)
 
 	if (!file_exists) {
 		/*
-		 * pvcreate/vgcreate/vgimportdevices/lvmdevices-add create
-		 * a new devices file here if it doesn't exist.
-		 * They have the create_edit_devices_file flag set.
-		 * First they create/lock-ex the devices file lockfile.
+		 * pvcreate/vgcreate create a new devices file here if it
+		 * doesn't exist.  They have create_edit_devices_file=1.
+		 * First create/lock-ex the devices file lockfile.
 		 * Other commands will not use a devices file if none exists.
 		 */
 		lock_mode = LOCK_EX;
diff --git a/lib/device/device_id.c b/lib/device/device_id.c
index 6c70f110c..a0a626533 100644
--- a/lib/device/device_id.c
+++ b/lib/device/device_id.c
@@ -2468,6 +2468,7 @@ static int _lock_devices_file(struct cmd_context *cmd, int mode, int nonblock, i
 
 	if (_devices_file_locked == mode) {
 		/* can happen when a command holds an ex lock and does an update in device_ids_validate */
+		/* can happen when vgimportdevices calls this directly, followed later by setup_devices */
 		if (held)
 			*held = 1;
 		return 1;