linux-kernel - Re: various dma

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Date:   Thu, 30 Aug 2018 03:40:13 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Christoph Hellwig <hch@....de>
Cc:     iommu@...ts.linux-foundation.org,
        Robin Murphy <robin.murphy@....com>,
        Meelis Roos <mroos@...ux.ee>,
        Linus Walleij <linus.walleij@...aro.org>,
        sparclinux@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: various dma_mask fixups

On Wed, Aug 29, 2018 at 03:38:21PM -0700, Guenter Roeck wrote:
> On Wed, Aug 29, 2018 at 08:23:58AM +0200, Christoph Hellwig wrote:
> > Fix warnings and regressions from requiring a dma mask.
> 
> With this series applied, I see the following in my sh4 boot tests.
> 
> sb 1-1: new full-speed USB device number 2 using sm501-usb
> sm501-usb sm501-usb: OHCI Unrecoverable Error, disabled
> sm501-usb sm501-usb: HC died; cleaning up
> 
> This is a persistent problem. Reverting upstream commit 2f606da7823
> ("mfd: sm501: Set coherent_dma_mask when creating subdevices") does not
> make a difference.
> 
This failure is now seen in -next.

Guenter