[igt-dev] [PATCH i-g-t 1/5] lib/i915: Assert mmap size alignment

[Tvrtko Ursulin]

From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>

mmap(2) mandates size is page aligned so check this in our wrappers.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
---
 lib/i915/gem_mman.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/i915/gem_mman.c b/lib/i915/gem_mman.c
index 3cf9a6bbdb31..084dbb3b3678 100644
--- a/lib/i915/gem_mman.c
+++ b/lib/i915/gem_mman.c
@@ -57,6 +57,8 @@ void *__gem_mmap__gtt(int fd, uint32_t handle, uint64_t size, unsigned prot)
 	struct drm_i915_gem_mmap_gtt mmap_arg;
 	void *ptr;
 
+	igt_assert(!(size & 4095));
+
 	memset(&mmap_arg, 0, sizeof(mmap_arg));
 	mmap_arg.handle = handle;
 	if (igt_ioctl(fd, DRM_IOCTL_I915_GEM_MMAP_GTT, &mmap_arg))
@@ -162,6 +164,8 @@ static void
 {
 	struct drm_i915_gem_mmap arg;
 
+	igt_assert(!(size & 4095));
+
 	memset(&arg, 0, sizeof(arg));
 	arg.handle = handle;
 	arg.offset = offset;
-- 
2.19.1