start a SAML SSO transaction from the identity provider

Consider this schema http://ift.tt/1gVToxN. User will go to the service provider and from there redirected to the identity provider.
But, In my system the user is on the Identity provider to begin with, and presses a link to go to the Service Provider.
So, My question is there a problem with skipping step 1 to 4 and start directly from 5 (Generate a SAML "response" and send it to the Service Provider).