On Sat, 11 Jun 2016, Wim Osterholt wrote: > > up to vanilla kernel 4.4.13 floppy functionality performs like it should. > (On an x86 PC that is. With a 1.44MB diskette drive.) > >From kernel 4.5* and up it changed to barely usable. > > After a virgin start (cold or warm boot) with an empty diskette drive and > then loaded with a standard 720K diskette you may run 'mdir' (from mtools) > and it shows the directory fine. > The first time you load a standard 1.44MB diskette (wether it is a virgin > start or after a 720K disktette) and you run mdir, it says literally: > > plain_io: Input/output error > init A: could not read boot sector > Cannot initialize 'A:' > > After this, all subsequent runs of mdir will do fine on both floppies. > However, most of my floppies are in a different format. (1.6MB) > I rely on 'setfdprm' (from fdutils) to set the correct parameters. > > setfdprm /dev/fd0 1600/1440 > /dev/fd0: Invalid argument > > Strace shows me: > ... > open(/dev/fd0, O_ACCMODE) = -1 > > So this actually means that 'invalid argument' refers to O_ACCMODE.
Hmm, could you please test with 09954bad448 reverted? (although I don't really have a good explanation currently how it'd be causing what you are observing). Thanks, -- Jiri Kosina SUSE Labs
