On Mon, Mar 19, 2018 at 08:59:45PM +0100, Christoph Hellwig wrote: > > +static u8 *add_bytestring_header(int *err, struct opal_dev *cmd, size_t len) > > { > > size_t header_len = 1; > > bool is_short_atom = true; > > - > > - if (*err) > > - return; > > + char *start; > > Shouldn't this also return early if we have a pending error? It will short circuit and bail out via can_add failing. So even though you have to go dig to see if the following functions handle the erorr I think it's slightly cleaner to have a single if (*err) in the deeper functions. This lest the error back out the call chain instead of having multiple if (*err) checks earlier in the call chains.