Hi Thomas, On Mon, Oct 23, 2023 at 07:55:52AM +0200, Thomas Weißschuh wrote: [...] > >> + err = i2c_master_send(client, write_buf, sizeof(write_buf)); > >> + if (err < 0) > >> + return err; > > > > You correctly return err (or rather, ret) for negative values, but you should also > > check that ret matches the size of the data sent. For 0 <= ret < sizeof(writebuf), > > return -EIO. > > The driver did this originally. > I then requested it to be removed as this case > can never happen. > i2c_master_send will either return size of(writebuf) or an error. Great catch; indeed you are correct. Apologies for having missed this in the change log; this is good to know in the future. That being said, it's a moot point IMO; this driver seems like a good candidate for regmap. If regmap cannot be made to work here for some reason, then I'd like to at least see some wrapper functions to avoid duplicate code and manual assignments to a buffer. Kind regards, Jeff LaBundy
