Commit 00d4b2bb authored Nov 12, 2010 by Stepan Moskovchenko Committed by Daniel Walker Nov 30, 2010

msm: iommu: Check if device is already attached



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>
Signed-off-by: Daniel Walker <dwalker@codeaurora.org>

parent 2607b0a2

arch/arm/mach-msm/iommu.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -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;