Messages in this thread Patch in this message | | | From | Stepan Moskovchenko <> | Subject | [PATCH 10/14] msm: iommu: Check if device is already attached | Date | Fri, 12 Nov 2010 19:29:56 -0800 |
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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.
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