From: Joerg Roedel <joro@8bytes.org>
To: Sricharan R <sricharan@codeaurora.org>
Cc: robin.murphy@arm.com, will.deacon@arm.com,
lorenzo.pieralisi@arm.com, iommu@lists.linux-foundation.org,
linux-arm-kernel@lists.infradead.org,
linux-arm-msm@vger.kernel.org, m.szyprowski@samsung.com,
bhelgaas@google.com, linux-pci@vger.kernel.org,
linux-acpi@vger.kernel.org, tn@semihalf.com,
hanjun.guo@linaro.org, okaya@codeaurora.org, robh+dt@kernel.org,
frowand.list@gmail.com, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, sudeep.holla@arm.com,
rjw@rjwysocki.net, lenb@kernel.org, catalin.marinas@arm.com,
arnd@arndb.de, linux-arch@vger.kernel.org,
laurent.pinchart@ideasonboard.com, j.neuschaefer@gmx.net,
geert@linux-m68k.org, magnus.damm@gmail.com,
nwatters@codeaurora.org, linux@armlinux.org.uk
Subject: Re: [PATCH v6 1/6] iommu: of: Fix check for returning EPROBE_DEFER
Date: Tue, 30 May 2017 11:32:13 +0200 [thread overview]
Message-ID: <20170530093212.GD2818@8bytes.org> (raw)
In-Reply-To: <1495892865-9506-1-git-send-email-sricharan@codeaurora.org>
On Sat, May 27, 2017 at 07:17:40PM +0530, Sricharan R wrote:
> Now with IOMMU probe deferral, we return -EPROBE_DEFER
> for masters that are connected to an IOMMU which is not
> probed yet, but going to get probed, so that we can attach
> the correct dma_ops. So while trying to defer the probe of
> the master, check if the of_iommu node that it is connected
> to is marked in DT as 'status=disabled', then the IOMMU is never
> is going to get probed. So simply return NULL and let the master
> work without an IOMMU.
>
> Fixes: 7b07cbefb68d ("iommu: of: Handle IOMMU lookup failure with deferred probing or error")
> Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Tested-by: Will Deacon <will.deacon@arm.com>
> Tested-by: Magnus Damn <magnus.damn@gmail.com>
> Acked-by: Will Deacon <will.deacon@arm.com>
> Signed-off-by: Sricharan R <sricharan@codeaurora.org>
> ---
> drivers/iommu/of_iommu.c | 1 +
> 1 file changed, 1 insertion(+)
Sorry for the confusion, I meant to apply this version of the patch-set
instead of v5.
prev parent reply other threads:[~2017-05-30 9:32 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-27 13:47 [PATCH v6 1/6] iommu: of: Fix check for returning EPROBE_DEFER Sricharan R
2017-05-27 13:47 ` [PATCH v6 2/6] iommu: of: Ignore all errors except EPROBE_DEFER Sricharan R
2017-05-27 13:47 ` [PATCH v6 3/6] ACPI/IORT: " Sricharan R
2017-05-27 19:18 ` Rafael J. Wysocki
2017-05-29 5:06 ` Sricharan R
2017-05-30 9:06 ` Lorenzo Pieralisi
2017-05-27 13:47 ` [PATCH v6 4/6] ARM: dma-mapping: Don't tear down third-party mappings Sricharan R
2017-05-27 13:47 ` [PATCH v6 5/6] ACPI/IORT: Move the check to get iommu_ops from translated fwspec Sricharan R
2017-05-27 13:47 ` [PATCH v6 6/6] arm: dma-mapping: Reset the device's dma_ops Sricharan R
2017-05-30 9:32 ` Joerg Roedel [this message]
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