external-provisioner: volume size mismatch between driver and side car containers

Hi we are facing an issue regarding volume size miss match between kubernetes and CSI driver

if I create a PVC of 1.5Gib, external-provisioner is sending the request to CSI driver in bytes, so the CSI driver will create a volume of size 1.5Gib but I think in sidecar container we are round up the value to 2Gib when creating the PV object.

https://github.com/kubernetes-csi/external-provisioner/blob/d0e48803f3280973b2e3fe4588498088dc0d2c5d/pkg/controller/controller.go#L636 is the line which does the round-off.

here is the sample snippet which round of the 1.5Gi to 2Gi https://play.golang.org/p/QZMKmIB5VjF