[igt-dev] [PATCH 2/2] tests/prime_generic: add vendor-agnostic prime tests

[Chris Wilson]

Quoting Ser, Simon (2019-08-16 11:07:56)
> On Fri, 2019-07-12 at 17:16 +0300, Oleg Vasilev wrote:
> > +static bool has_prime_import(int fd)
> > +{
> > +     uint64_t value;
> > +
> > +     if (drmGetCap(fd, DRM_CAP_PRIME, &value))
> > +             return false;
> > +
> > +     return value & DRM_PRIME_CAP_IMPORT;
> 
> This returns a non-zero value when import is supported, but doesn't
> return true. This can lead to strange bugs.
> 
> It's common to use !! to convert to a bool.

But not required when embracing stdbool as it defined in the spec for
the implicit cast.
-Chris