Revert "Partial revert of "More optmizations""

This reverts commit e2e1b1335e8094883fa103ad1ae309109e7511b0.
Revert "MSM KCAL: add checksum and data integrity checks"

This reverts commit 9f9b9438aebc66a48f0c6508e07adb5d8ac27b78.