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Subject: Re: pci_size() error condition
From: John Rose <johnrose@austin.ibm.com>
To: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: lkml <linux-kernel@vger.kernel.org>
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> It was always effectual for IO where the mask is 0xffff.

Okay, point taken :)  So for cases of base == maxbase, why would we ever
want to return a nonzero value?  What is the intended purpose of the
second part of that conditional?