From: Will Deacon <will.deacon@arm.com>
To: Nikita Yushchenko <nikita.yoush@cogentembedded.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
Robin Murphy <robin.murphy@arm.com>,
linux-arm-kernel@lists.infradead.org,
linux-renesas-soc@vger.kernel.org,
Simon Horman <horms@verge.net.au>,
Bjorn Helgaas <bhelgaas@google.com>,
fkan@apm.com, linux-kernel@vger.kernel.org,
Artemi Ivanov <artemi.ivanov@cogentembedded.com>
Subject: Re: [PATCH 1/2] dma-mapping: let arch know origin of dma range passed to arch_setup_dma_ops()
Date: Thu, 12 Jan 2017 12:16:24 +0000 [thread overview]
Message-ID: <20170112121623.GH1771@arm.com> (raw)
In-Reply-To: <764334db-3400-58c6-cc4b-3f7ce66daa27@cogentembedded.com>
On Thu, Jan 12, 2017 at 08:52:51AM +0300, Nikita Yushchenko wrote:
> >> diff --git a/drivers/staging/fsl-mc/bus/fsl-mc-bus.c b/drivers/staging/fsl-mc/bus/fsl-mc-bus.c
> >> index 5ac373c..480b644 100644
> >> --- a/drivers/staging/fsl-mc/bus/fsl-mc-bus.c
> >> +++ b/drivers/staging/fsl-mc/bus/fsl-mc-bus.c
> >> @@ -540,7 +540,7 @@ int fsl_mc_device_add(struct dprc_obj_desc *obj_desc,
> >>
> >> /* Objects are coherent, unless 'no shareability' flag set. */
> >> if (!(obj_desc->flags & DPRC_OBJ_FLAG_NO_MEM_SHAREABILITY))
> >> - arch_setup_dma_ops(&mc_dev->dev, 0, 0, NULL, true);
> >> + arch_setup_dma_ops(&mc_dev->dev, 0, 0, false, NULL, true);
> >>
> >> /*
> >> * The device-specific probe callback will get invoked by device_add()
> >
> > Why are these actually calling arch_setup_dma_ops() here in the first
> > place? Are these all devices that are DMA masters without an OF node?
>
> I don't know, but that's a different topic. This patch just adds
> argument and sets it to false everywhere but in the location when range
> should be definitely enforced.
I also wouldn't lose any sleep over a staging driver.
Will
next prev parent reply other threads:[~2017-01-12 12:17 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <dca35acf-1adf-aa85-7a0b-d0c6ec702fa1@arm.com>
2017-01-11 18:31 ` [PATCH 0/2] arm64: fix handling of DMA masks wider than bus supports Nikita Yushchenko
2017-01-11 18:31 ` [PATCH 1/2] dma-mapping: let arch know origin of dma range passed to arch_setup_dma_ops() Nikita Yushchenko
2017-01-11 21:08 ` Arnd Bergmann
2017-01-12 5:52 ` Nikita Yushchenko
2017-01-12 6:33 ` Nikita Yushchenko
2017-01-12 13:28 ` Arnd Bergmann
2017-01-12 13:39 ` Nikita Yushchenko
2017-01-12 12:16 ` Will Deacon [this message]
2017-01-12 13:25 ` Arnd Bergmann
2017-01-12 13:43 ` Robin Murphy
2017-01-13 10:40 ` kbuild test robot
2017-01-11 18:31 ` [PATCH 2/2] arm64: avoid increasing DMA masks above what hardware supports Nikita Yushchenko
2017-01-11 21:11 ` Arnd Bergmann
2017-01-12 5:53 ` Nikita Yushchenko
2017-01-13 10:16 ` kbuild test robot
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