From: Christoph Hellwig <hch@lst.de>
To: Meelis Roos <mroos@linux.ee>
Cc: Christoph Hellwig <hch@lst.de>,
linuxppc-dev@lists.ozlabs.org, iommu@lists.linux-foundation.org,
Linux Kernel list <linux-kernel@vger.kernel.org>
Subject: Re: pata-macio WARNING at dmam_alloc_coherent+0xec/0x110
Date: Tue, 13 Feb 2018 02:45:46 +0100 [thread overview]
Message-ID: <20180213014546.GB3303@lst.de> (raw)
In-Reply-To: <alpine.LRH.2.21.1802122246230.9153@math.ut.ee>
On Mon, Feb 12, 2018 at 10:52:46PM +0200, Meelis Roos wrote:
> I tested 4.16-rc1 on my PowerMac G4 and got the following warning from
> macio pata driver. Since pata-macio has no recent changes, dma-mapping.h
> changes seem to be related.
Thje are, as they add just that warning. But the root cause looks
older, and that is that the macio bus doesn't seem to to set the
dma coherent mask, which could cause all kinds of hidden issues.
I'm travelling right now, but unless someone beats me to it I'll look
into a patch to properly set the coherent mask ASAP.
next prev parent reply other threads:[~2018-02-13 1:45 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-12 20:52 pata-macio WARNING at dmam_alloc_coherent+0xec/0x110 Meelis Roos
2018-02-13 1:45 ` Christoph Hellwig [this message]
2018-02-13 14:51 ` Christoph Hellwig
2018-02-13 15:22 ` Mathieu Malaterre
2018-02-13 16:46 ` Meelis Roos
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