[Intel-gfx] [PATCH i-g-t v2] lib/igt_sysfs: Let igt_sysfs_read|write return -errno

[Daniel Vetter]

On Thu, Dec 07, 2017 at 04:59:36PM +0000, Chris Wilson wrote:
> Quoting Michal Wajdeczko (2017-12-07 16:52:46)
> > In some cases debugfs or sysfs may return errors that we
> > want to check. Return -errno from helper functions to make
> > asserts easier.
> > 
> > v2: don't forget about EOF ret=0 (Chris)
> >     small re-write (Michal)
> > 
> > Signed-off-by: Michal Wajdeczko <michal.wajdeczko at intel.com>
> > Cc: Chris Wilson <chris at chris-wilson.co.uk>
> > Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
> Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
> 
> Just tests/drv_hangman.c needs to fixed to use
> igt_require(sysfs >= 0);

Isn't the usual igt pattern that igt_foo never fails, and __igt_foo gives
you the error code? But I guess we can do that later on in follow-ups.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch