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From: Stepan Moskovchenko <stepanm@codeaurora.org>
To: dwalker@codeaurora.org
Cc: davidb@codeaurora.org, bryanh@codeaurora.org,
	linux-arm-msm@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	Stepan Moskovchenko <stepanm@codeaurora.org>
Subject: [PATCH 10/14] msm: iommu: Check if device is already attached
Date: Fri, 12 Nov 2010 19:29:56 -0800	[thread overview]
Message-ID: <1289619000-13167-11-git-send-email-stepanm@codeaurora.org> (raw)
In-Reply-To: <1289619000-13167-1-git-send-email-stepanm@codeaurora.org>

An IOMMU device can only be attached to one IOMMU domain at
any given time. Check whether the device is already
attached to a domain before allowing it to be attached to
another domain. If so, return busy.

Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>
---
 arch/arm/mach-msm/iommu.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-msm/iommu.c b/arch/arm/mach-msm/iommu.c
index 74f2157..67e8f53 100644
--- a/arch/arm/mach-msm/iommu.c
+++ b/arch/arm/mach-msm/iommu.c
@@ -241,6 +241,11 @@ static int msm_iommu_attach_dev(struct iommu_domain *domain, struct device *dev)
 		goto fail;
 	}
 
+	if (!list_empty(&ctx_drvdata->attached_elm)) {
+		ret = -EBUSY;
+		goto fail;
+	}
+
 	list_for_each_entry(tmp_drvdata, &priv->list_attached, attached_elm)
 		if (tmp_drvdata == ctx_drvdata) {
 			ret = -EBUSY;
-- 
1.7.0.2

Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.


WARNING: multiple messages have this Message-ID (diff)
From: stepanm@codeaurora.org (Stepan Moskovchenko)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 10/14] msm: iommu: Check if device is already attached
Date: Fri, 12 Nov 2010 19:29:56 -0800	[thread overview]
Message-ID: <1289619000-13167-11-git-send-email-stepanm@codeaurora.org> (raw)
In-Reply-To: <1289619000-13167-1-git-send-email-stepanm@codeaurora.org>

An IOMMU device can only be attached to one IOMMU domain at
any given time. Check whether the device is already
attached to a domain before allowing it to be attached to
another domain. If so, return busy.

Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>
---
 arch/arm/mach-msm/iommu.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-msm/iommu.c b/arch/arm/mach-msm/iommu.c
index 74f2157..67e8f53 100644
--- a/arch/arm/mach-msm/iommu.c
+++ b/arch/arm/mach-msm/iommu.c
@@ -241,6 +241,11 @@ static int msm_iommu_attach_dev(struct iommu_domain *domain, struct device *dev)
 		goto fail;
 	}
 
+	if (!list_empty(&ctx_drvdata->attached_elm)) {
+		ret = -EBUSY;
+		goto fail;
+	}
+
 	list_for_each_entry(tmp_drvdata, &priv->list_attached, attached_elm)
 		if (tmp_drvdata == ctx_drvdata) {
 			ret = -EBUSY;
-- 
1.7.0.2

Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

  parent reply	other threads:[~2010-11-13  3:30 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-11-13  3:29 [PATCH 00/14] Improvements to the MSM IOMMU driver Stepan Moskovchenko
2010-11-13  3:29 ` Stepan Moskovchenko
2010-11-13  3:29 ` [PATCH 01/14] msm: iommu: Increase maximum MID size to 5 bits Stepan Moskovchenko
2010-11-13  3:29   ` Stepan Moskovchenko
2010-11-13  3:29 ` [PATCH 02/14] msm: iomap: Addresses and IRQs for 2nd GFX core IOMMU Stepan Moskovchenko
2010-11-13  3:29   ` Stepan Moskovchenko
2010-11-13  3:29 ` [PATCH 03/14] msm: iommu: Use more consistent naming in platform data Stepan Moskovchenko
2010-11-13  3:29   ` Stepan Moskovchenko
2010-11-13  3:29 ` [PATCH 04/14] msm: iommu: Revise GFX3D IOMMU contexts and M2V mappings Stepan Moskovchenko
2010-11-13  3:29   ` Stepan Moskovchenko
2010-11-13  3:29 ` [PATCH 05/14] msm: iommu: Revise GFX2D0 " Stepan Moskovchenko
2010-11-13  3:29   ` Stepan Moskovchenko
2010-11-13  3:29 ` [PATCH 06/14] msm: iommu: Support for the 2nd GFX core's IOMMU Stepan Moskovchenko
2010-11-13  3:29   ` Stepan Moskovchenko
2010-11-13  3:29 ` [PATCH 07/14] msm: iommu: Mark functions with the right section names Stepan Moskovchenko
2010-11-13  3:29   ` Stepan Moskovchenko
2010-11-13  3:29 ` [PATCH 08/14] msm: iommu: Don't flush page tables if no devices attached Stepan Moskovchenko
2010-11-13  3:29   ` Stepan Moskovchenko
2010-11-13  3:29 ` [PATCH 09/14] msm: iommu: Kconfig option for cacheable page tables Stepan Moskovchenko
2010-11-13  3:29   ` Stepan Moskovchenko
2010-11-14 20:17   ` Daniel Walker
2010-11-14 20:17     ` Daniel Walker
2010-11-15  2:56     ` Stepan Moskovchenko
2010-11-15  2:56       ` Stepan Moskovchenko
2010-11-15  2:56       ` Stepan Moskovchenko
2010-11-15 18:20       ` Daniel Walker
2010-11-15 18:20         ` Daniel Walker
2010-11-15 18:20         ` Daniel Walker
2010-11-16  1:47         ` Stepan Moskovchenko
2010-11-16  1:47           ` Stepan Moskovchenko
2010-11-16  1:47           ` Stepan Moskovchenko
2010-11-16  1:46   ` [PATCH 09/14 v2] msm: iommu: Kconfig item " Stepan Moskovchenko
2010-11-16  1:46     ` Stepan Moskovchenko
2010-11-13  3:29 ` Stepan Moskovchenko [this message]
2010-11-13  3:29   ` [PATCH 10/14] msm: iommu: Check if device is already attached Stepan Moskovchenko
2010-11-13  3:29 ` [PATCH 11/14] msm: iommu: Kconfig dependency for the IOMMU API Stepan Moskovchenko
2010-11-13  3:29   ` Stepan Moskovchenko
2010-11-13  3:29 ` [PATCH 12/14] msm: iommu: Definitions for extended memory attributes Stepan Moskovchenko
2010-11-13  3:29   ` Stepan Moskovchenko
2010-11-16  2:19   ` [PATCH 12/14 v2] " Stepan Moskovchenko
2010-11-16  2:19     ` Stepan Moskovchenko
2010-11-13  3:29 ` [PATCH 13/14] msm: iommu: Support cache-coherent memory access Stepan Moskovchenko
2010-11-13  3:29   ` Stepan Moskovchenko
2010-11-16  2:20   ` [PATCH 13/14 v2] " Stepan Moskovchenko
2010-11-16  2:20     ` Stepan Moskovchenko
2010-11-13  3:30 ` [PATCH 14/14] msm: iommu: Miscellaneous code cleanup Stepan Moskovchenko
2010-11-13  3:30   ` Stepan Moskovchenko
2010-11-16  0:25   ` Daniel Walker
2010-11-16  0:25     ` Daniel Walker
2010-11-16  1:16     ` Stepan Moskovchenko
2010-11-16  1:16       ` Stepan Moskovchenko
2010-11-16 20:45       ` Daniel Walker
2010-11-16 20:45         ` Daniel Walker

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