Merge pull request #2540 from yan234280533/uninstall-name-check

adjust the check parameter order for uninstall 

pkg/tiller/release_uninstall.go

@@ -30,12 +30,6 @@ import (
 
 // UninstallRelease deletes all of the resources associated with this release, and marks the release DELETED.
 func (s *ReleaseServer) UninstallRelease(c ctx.Context, req *services.UninstallReleaseRequest) (*services.UninstallReleaseResponse, error) {
-	err := s.env.Releases.LockRelease(req.Name)
-	if err != nil {
-		return nil, err
-	}
-	defer s.env.Releases.UnlockRelease(req.Name)
-
 	if !ValidName.MatchString(req.Name) {
 		s.Log("uninstall: Release not found: %s", req.Name)
 		return nil, errMissingRelease
@@ -45,6 +39,12 @@ func (s *ReleaseServer) UninstallRelease(c ctx.Context, req *services.UninstallR
 		return nil, fmt.Errorf("release name %q exceeds max length of %d", req.Name, releaseNameMaxLen)
 	}
 
+	err := s.env.Releases.LockRelease(req.Name)
+	if err != nil {
+		return nil, err
+	}
+	defer s.env.Releases.UnlockRelease(req.Name)
+
 	rels, err := s.env.Releases.History(req.Name)
 	if err != nil {
 		s.Log("uninstall: Release not loaded: %s", req.Name)