From: Rasmus Villemoes > Sent: 28 April 2023 07:57 > > On 27/04/2023 13.51, Konrad Gräfe wrote: > > The CDC-ECM specification requires an USB gadget to send the host MAC > > address as uppercase hex string. This change adds the appropriate > > modifier. > > Thinking more about it, I'm not sure this is appropriate, not for a > single user like this. vsprintf() should not and cannot satisfy all > possible string formatting requirements for the whole kernel. The %pX > extensions are convenient for use with printk() and friends where one > needs what in other languages would be "string interpolation" (because > then the caller doesn't need to deal with temporary stack buffers and > pass them as %s arguments), but for single items like this, snprintf() > is not necessarily the right tool for the job. > > In this case, the caller can just as well call string_upper() on the > result, or not use sprintf() at all and do a tiny loop with > hex_byte_pack_upper(). Or snprintf with "%02X:%02X:%02X:%02X:%02X:%02X". David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)
