On Tue, Jul 22, 2014 at 12:23:07PM +0200, Andrzej Hajda wrote: > Hi Thierry, > > YoungJun's comment refreshed my memory about mipi_dsi_dcs_write return > value. It should be rather int than ssize_t. Why? > .transfer() returns the number of read bytes or error, but in case > of dcs write no bytes are read, so it in fact returns error or 0. > This is why return value was implemented originally as int. > So I do not think this patch is necessary. I think it should return the number of bytes written or an error. That way we give callers the maximum amount of information. They may still choose to only handle < 0 for convenience, but at least the information will be there should it become required at some point. Thierry
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