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When probing a device fails NULL pointer is returned, and following devices in uclass list cannot be iterated. Skip to next device on error instead. With that the only condition under which these simple iteration functions return error is when the dm is not initialized at uclass_get time. This is not all that interesting, change return type to void. Fixes: 6494d708 ("dm: Add base driver model support") Signed-off-by: Michal Suchanek <msuchanek@suse.de> Reviewed-by: Simon Glass <sjg@chromium.org>
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