mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
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>
This commit is contained in:
parent
2607b0a260
commit
00d4b2bb03
1 changed files with 5 additions and 0 deletions
|
@ -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;
|
||||
|
|
Loading…
Reference in a new issue