From: Jose Abreu <joabreu@synopsys.com>
Date: Jul/19/2019, 11:25:41 (UTC+00:00)

> Thanks. Can you add attached patch and check if WARN is triggered ? 

BTW, also add the attached one in this mail. The WARN will probably 
never get triggered without it.

Can you also print "buf->addr" after the WARN_ON ?

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Thanks,
Jose Miguel Abreu