interrupt handler not getting called after resume

Hi All, I have one general query. If an interrupt handler is NOT getting called (for one device) after the system resume (from snapshot image), then what could be the issue? Note: * The suspend worked perfectly fine. * The runtime suspend/resume of the system is also working fine. If anybody have experienced this situation and fixed it, please let us know. It will be a great input for further debugging. Regards, Pintu