Sprinkle igt_assert(ptr) after gem_mmap__{cpu,gtt,wc}

Do the following
 ptr = gem_mmap__{cpu,gtt,wc}()
+igt_assert(ptr);

whenever the code doesn't handle the NULL ptr in any kind of
specific way.

Makes it easier to move the assert into gem_mmap__{cpu,gtt,wc}() itself.

Mostly done with coccinelle, with some manual cleanups:
@@
identifier I;
@@
<... when != igt_assert(I)
     when != igt_require(I)
     when != igt_require_f(I, ...)
     when != I != NULL
     when != I == NULL
(
  I = gem_mmap__gtt(...);
+ igt_assert(I);
|
  I = gem_mmap__cpu(...);
+ igt_assert(I);
|
  I = gem_mmap__wc(...);
+ igt_assert(I);
)
...>

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Stochastically-reviwewed-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 4 insertions, 1 deletions

diff --git a/tests/gem_gtt_hog.c b/tests/gem_gtt_hog.c
index b0673a49..cbb7016e 100644
--- a/tests/gem_gtt_hog.c
+++ b/tests/gem_gtt_hog.c
@@ -141,9 +141,12 @@ static void run(data_t *data, int child)
 	 */
 	if (write) {
 		ptr = gem_mmap__gtt(data->fd, handle, size, PROT_READ | PROT_WRITE);
+		igt_assert(ptr);
 		ptr[rand() % (size / 4)] = canary;
-	} else
+	} else {
 		ptr = gem_mmap__gtt(data->fd, handle, size, PROT_READ);
+		igt_assert(ptr);
+	}
 	x = ptr[rand() % (size / 4)];
 	munmap(ptr, size);