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Date:   Thu, 20 Oct 2022 08:46:22 +0700
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Subject: =?UTF-8?Q?Re=3a_=5bPATCH_6=2e0_659/862=5d_ARM/dma-mapp=d1=96ng=3a_d?=
 =?UTF-8?Q?ont_override_-=3edma=5fcoherent_when_set_from_a_bus_notifier?=
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        linux-kernel@vger.kernel.org
Cc:     stable@vger.kernel.org,
        =?UTF-8?Q?Marek_Beh=c3=ban?= <kabel@kernel.org>,
        Christoph Hellwig <hch@lst.de>,
        "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>,
        Sasha Levin <sashal@kernel.org>
References: <20221019083249.951566199@linuxfoundation.org>
 <20221019083319.087440003@linuxfoundation.org>
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From:   Bagas Sanjaya <bagasdotme@gmail.com>
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On 10/19/22 15:32, Greg Kroah-Hartman wrote:
> From: Christoph Hellwig <hch@lst.de>
> 
> [ Upstream commit 49bc8bebae79c8516cb12f91818f3a7907e3ebce ]
> 
> Commit ae626eb97376 ("ARM/dma-mapping: use dma-direct unconditionally")
> caused a regression on the mvebu platform, wherein devices that are
> dma-coherent are marked as dma-noncoherent, because although
> mvebu_hwcc_notifier() after that commit still marks then as coherent,
> the arm_coherent_dma_ops() function, which is called later, overwrites
> this setting, since it is being called from drivers/of/device.c with
> coherency parameter determined by of_dma_is_coherent(), and the
> device-trees do not declare the 'dma-coherent' property.
> 
> Fix this by defaulting never clearing the dma_coherent flag in
> arm_coherent_dma_ops().
> 

The patch subject looks mangled, right?

-- 
An old man doll... just what I always wanted! - Clara