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drm/vmwgfx: Return error code from vmw_execbuf_copy_fence_user

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commit 728354c005c36eaf44b6e5552372b67e60d17f56 upstream.

The function was unconditionally returning 0, and a caller would have to
rely on the returned fence pointer being NULL to detect errors. However,
the function vmw_execbuf_copy_fence_user() would expect a non-zero error
code in that case and would BUG otherwise.

So make sure we return a proper non-zero error code if the fence pointer
returned is NULL.

Cc: <stable@vger.kernel.org>
Fixes: ae2a104058e2: ("vmwgfx: Implement fence objects")
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Deepak Rawat <drawat@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thomas Hellstrom 2019-01-31 10:55:37 +01:00 committed by Greg Kroah-Hartman
parent 6bcca0bc47
commit 697c6f72c4
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
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@ -3663,7 +3663,7 @@ int vmw_execbuf_fence_commands(struct drm_file *file_priv,
*p_fence = NULL;
}
return 0;
return ret;
}
/**