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gpu: ion: Do not allow cached IOMMU mappings.

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Cached IOMMU mapping is not supported.

Add check for clients trying to map buffers
into IOMMU as cached and return error.

Change-Id: Ic63a24bf651d613933633cd81143701f66df566c
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
This commit is contained in:
Olav Haugan
2012-02-24 13:11:10 -08:00
committed by Stephen Boyd
parent 243ec126f7
commit b6ecf576cd
1 changed files with 5 additions and 5 deletions
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10
drivers/gpu/ion/ion.c
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@@ -611,6 +611,11 @@ int ion_map_iommu(struct ion_client *client, struct ion_handle *handle,
struct ion_iommu_map *iommu_map;
int ret = 0;
if (ION_IS_CACHED(flags)) {
pr_err("%s: Cannot map iommu as cached.\n", __func__);
return -EINVAL;
}
mutex_lock(&client->lock);
if (!ion_handle_validate(client, handle)) {
pr_err("%s: invalid handle passed to map_kernel.\n",
@@ -629,11 +634,6 @@ int ion_map_iommu(struct ion_client *client, struct ion_handle *handle,
goto out;
}
if (ion_validate_buffer_flags(buffer, flags)) {
ret = -EEXIST;
goto out;
}
/*
* If clients don't want a custom iova length, just use whatever
* the buffer size is