From: Joerg Roedel <joro@8bytes.org>
To: Yong Wu <yong.wu@mediatek.com>
Cc: iommu@lists.linux-foundation.org,
Will Deacon <will.deacon@arm.com>,
linux-kernel@vger.kernel.org, yingjoe.chen@mediatek.com
Subject: Re: [PATCH 0/8] iommu: Make core iommu-groups code more generic
Date: Thu, 19 Nov 2015 14:41:14 +0100 [thread overview]
Message-ID: <20151119134114.GC2064@8bytes.org> (raw)
In-Reply-To: <1447920801.27650.49.camel@mhfsdcap03>
Hi Yong Wu,
On Thu, Nov 19, 2015 at 04:13:21PM +0800, Yong Wu wrote:
> (151119_13:39:37.472)WARNING:
> at /proj/mtk40525/upstreamdev/v4.4/kernel/mediatek/drivers/iommu/iommu.c:1154
> (151119_13:39:37.472)Modules linked in:
> (151119_13:39:37.472)CPU: 1 PID: 731 Comm: sh Not tainted 4.4.0-rc1+
> #37
> (151119_13:39:37.472)Hardware name: MediaTek MT8173 evaluation board
> (DT)
> (151119_13:39:37.472)task: ffffffc076bb4d00 ti: ffffffc076bdc000
> task.ti: ffffffc076bdc000
> (151119_13:39:37.472)PC is at iommu_detach_device+0x5c/0xb0
> (151119_13:39:37.472)LR is at iommu_detach_device+0x30/0xb0
> xxx
This warning triggers when you use iommu_detach_device() with a device
that is in a group with other devices. For those devices you must
attach/detach the whole group of devices.
For that you have to use iommu_detach_group() and iommu_attach_group().
Joerg
next prev parent reply other threads:[~2015-11-19 13:41 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-21 21:51 [PATCH 0/8] iommu: Make core iommu-groups code more generic Joerg Roedel
2015-10-21 21:51 ` [PATCH 1/8] iommu: Revive device_group iommu-ops call-back Joerg Roedel
2015-10-21 21:51 ` [PATCH 2/8] iommu: Export and rename iommu_group_get_for_pci_dev() Joerg Roedel
2015-10-21 21:51 ` [PATCH 3/8] iommu: Add generic_device_group() function Joerg Roedel
2015-10-21 21:51 ` [PATCH 4/8] iommu: Add device_group call-back to x86 iommu drivers Joerg Roedel
2015-10-21 21:51 ` [PATCH 5/8] iommu/fsl: Convert to device_group call-back Joerg Roedel
2015-10-21 21:51 ` [PATCH 6/8] iommu/arm-smmu: Switch " Joerg Roedel
2015-10-21 21:51 ` [PATCH 7/8] iommu: Remove is_pci_dev() fall-back from iommu_group_get_for_dev Joerg Roedel
2015-10-21 21:51 ` [PATCH 8/8] iommu: Move default domain allocation to iommu_group_get_for_dev() Joerg Roedel
2015-10-29 18:22 ` Will Deacon
2015-10-30 14:13 ` Joerg Roedel
2015-11-19 9:06 ` [PATCH 0/8] iommu: Make core iommu-groups code more generic Yong Wu
[not found] ` <1447920801.27650.49.camel@mhfsdcap03>
2015-11-19 13:41 ` Joerg Roedel [this message]
2015-12-01 11:29 ` Yong Wu
2015-12-01 15:15 ` Joerg Roedel
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