On Mon, 25 Jul 2016, Jens Axboe wrote: > > From: Jiri Kosina <jkosina@xxxxxxx> > > > > Commit 09954bad4 ("floppy: refactor open() flags handling"), as a > > side-effect, causes open(/dev/fdX, O_ACCMODE) to fail. It turns out that > > this is being used setfdprm userspace for ioctl-only open(). > > > > Reintroduce back the original behavior wrt !(FMODE_READ|FMODE_WRITE) > > modes, while still keeping the original O_NDELAY bug fixed. > > > > Cc: stable@xxxxxxxxxxxxxxx # v4.5+ > > Reported-by: Wim Osterholt <wim@xxxxxxxxxxxxxx> > > Tested-by: Wim Osterholt <wim@xxxxxxxxxxxxxx> > > Signed-off-by: Jiri Kosina <jkosina@xxxxxxx> > > Added for this series, thanks. [ CCing Denis too ] Let me revive this 4 years old thread. I've just now noticed that instead of my patch above being merged, what happened instead was commit f2791e7eadf437633f30faa51b30878cf15650be Author: Jens Axboe <axboe@xxxxxx> Date: Thu Aug 25 08:56:51 2016 -0600 Revert "floppy: refactor open() flags handling" This reverts commit 09954bad448791ef01202351d437abdd9497a804. which was plain revert of 09954bad4 (without any further explanation), which in turn reintroduced the O_NDELAY issue, and I've just been hit by it again. I am not able to find any e-mail thread that'd indicate why ultimately revert happened, instead of mergin my fix. Jens, do you have any idea? Thanks, -- Jiri Kosina SUSE Labs