renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-24 05:04:00 +08:00
Code

msm: iommu: Check if device is already attached

Browse Source 
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>
This commit is contained in:
Stepan Moskovchenko 2010-11-12 19:29:56 -08:00 committed by Daniel Walker
parent 2607b0a260
commit 00d4b2bb03
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/arm/mach-msm/iommu.c
View File

@ -241,6 +241,11 @@ static int msm_iommu_attach_dev(struct iommu_domain *domain, struct device *dev)
goto fail; goto fail;
} }
if (!list_empty(&ctx_drvdata->attached_elm)) {
ret = -EBUSY;
goto fail;
}
list_for_each_entry(tmp_drvdata, &priv->list_attached, attached_elm) list_for_each_entry(tmp_drvdata, &priv->list_attached, attached_elm)
if (tmp_drvdata == ctx_drvdata) { if (tmp_drvdata == ctx_drvdata) {
ret = -EBUSY; ret = -EBUSY;