On Fri, 2017-11-03 at 13:55 +0100, Christoph Hellwig wrote: > On Fri, Nov 03, 2017 at 11:02:50AM +0100, Javier González wrote: > > Signed-off-by: Javier González <javier@xxxxxxxxxxxx> [] > > diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c [] > > @@ -2108,7 +2108,7 @@ static ssize_t eui_show(struct device *dev, struct device_attribute *attr, > > char *buf) > > { > > struct nvme_ns *ns = nvme_get_ns_from_dev(dev); > > - return sprintf(buf, "%8phd\n", ns->eui); > > + return sprintf(buf, "%8phD\n", ns->eui); > > } > > static DEVICE_ATTR(eui, S_IRUGO, eui_show, NULL); > > This looks correct. I wonder what the old code printed - does someone > have a device with an EUI-64 at hand to quickly cross check what we > did before? It uses spaces between bytes and not dashes. The code has been this way a couple years now. I think this proposal, while it might fix an unintentional output style, could also be an API and could cause user breakage if changed. Perhaps this should just become %8ph without D