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drm/vc4: Fix a couple error codes in vc4_cl_lookup_bos()

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commit b2cdeb19f1 upstream.

If the allocation fails the current code returns success.  If
copy_from_user() fails it returns the number of bytes remaining instead
of -EFAULT.

Fixes: d5b1a78a77 ("drm/vc4: Add support for drawing 3D frames.")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Carpenter
2016-10-13 11:54:31 +03:00
committed by Greg Kroah-Hartman
parent a63bb198dc
commit c730a84aff
1 changed files with 5 additions and 4 deletions
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9
drivers/gpu/drm/vc4/vc4_gem.c
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@@ -544,14 +544,15 @@ vc4_cl_lookup_bos(struct drm_device *dev,
handles = drm_malloc_ab(exec->bo_count, sizeof(uint32_t));
if (!handles) {
ret = -ENOMEM;
DRM_ERROR("Failed to allocate incoming GEM handles\n");
goto fail;
}
ret = copy_from_user(handles,
(void __user *)(uintptr_t)args->bo_handles,
exec->bo_count * sizeof(uint32_t));
if (ret) {
if (copy_from_user(handles,
(void __user *)(uintptr_t)args->bo_handles,
exec->bo_count * sizeof(uint32_t))) {
ret = -EFAULT;
DRM_ERROR("Failed to copy in GEM handles\n");
goto fail;
}