linux-kernel - Re: [PATCH 22/22] parisc: use generic dma_noncoherent

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Message-ID: <84d9e1ac-86c3-6f2e-377f-2be44783b933@gmx.de>
Date:   Wed, 25 Apr 2018 23:07:57 +0200
From:   Helge Deller <deller@....de>
To:     Christoph Hellwig <hch@....de>
Cc:     linux-arch@...r.kernel.org, Michal Simek <monstr@...str.eu>,
        Greentime Hu <green.hu@...il.com>,
        Vincent Chen <deanbo422@...il.com>,
        linux-alpha@...r.kernel.org, linux-snps-arc@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-c6x-dev@...ux-c6x.org,
        linux-hexagon@...r.kernel.org, linux-m68k@...ts.linux-m68k.org,
        nios2-dev@...ts.rocketboards.org, openrisc@...ts.librecores.org,
        linux-parisc@...r.kernel.org, linux-sh@...r.kernel.org,
        sparclinux@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 22/22] parisc: use generic dma_noncoherent_ops

On 25.04.2018 09:21, Christoph Hellwig wrote:
> On Sat, Apr 21, 2018 at 07:43:46PM +0200, Helge Deller wrote:
>> This patch breaks a 32bit kernel on a B160L machine (PA7300LC CPU, "pcxl2").
>> After applying this patch series the lasi82956 network driver works unreliable. 
>> NIC gets IP, but ping doesn't work.
>> See drivers/net/ethernet/i825xx/lasi_82596.c, it uses dma*sync() functions.
> 
> Just to confirm:  Without the series it is known to actually work?

Yes.
I reverted this series from my tree, rebuilt, and then the issue was gone.
I won't be able to test again earlier than next week.

Helge