How the sins of Sudarshan (the Chakra) were absolved

Rudra, (manifestationof Siva), in a state of anger, at finding that no weapon could destroy Jalandhara, the demon, rubbed his right thumb on the earth and generated fire. Sudarshan Chakra, borne out of this fire, was handed over to Lord Vishnu by Lord Siva, for destroying the demon. Lord Vishnu destroyed the demon with the help of this Chakra. But, there arose a tussle between Sudarshan and Vishnu as each claimed the honour of slaying the demon. Lord Vishnu, angry with this, cursed Sudarshan that he lose his brightness. Sudarshan thereupon prayed to Sri Kalahastheeswara with great devotion. Lord Siva arised from the Linga pointed out the mistake that Sudarshan committed and absolved him of the sin that accrued as a consequence.
Even today, in the temple of Sri Kalahasthi, to the east of the image of Sri Durga, one can see a Linga with an epithet Chakreshwara to reflect this episode. The fifth day of the full moon in the month of Chitra is reckoned as the day on which Sri Kalahastheeswara absolved Sudarshan of his sin.