On Tue, 2017-11-14 at 22:33 +0000, Chris Wilson wrote: > smatch does not track initialised values as well as gcc, and this > triggers many warnings by smatch not presented by gcc. Silence smatch by > initialising the error values to -ENODEV, which we use to denote > internal errors. (If we see a selftest fail with a silent -ENODEV, we > know smatch was right!) > > v2: smatch was right about igt_create_vma(), it may unlikely fail on the > first object allocation which we want to be loud about. >
Reviewed-by: Dhinakaran Pandiyan <[email protected]> > Signed-off-by: Chris Wilson <[email protected]> > --- > drivers/gpu/drm/i915/selftests/i915_gem_context.c | 2 +- > drivers/gpu/drm/i915/selftests/i915_gem_gtt.c | 8 ++++---- > drivers/gpu/drm/i915/selftests/i915_gem_request.c | 2 +- > drivers/gpu/drm/i915/selftests/i915_gem_timeline.c | 2 +- > drivers/gpu/drm/i915/selftests/i915_syncmap.c | 6 +++--- > drivers/gpu/drm/i915/selftests/i915_vma.c | 2 +- > 6 files changed, 11 insertions(+), 11 deletions(-) > > diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_context.c > b/drivers/gpu/drm/i915/selftests/i915_gem_context.c > index 61fcfa2c4dfd..664d1b4f8c69 100644 > --- a/drivers/gpu/drm/i915/selftests/i915_gem_context.c > +++ b/drivers/gpu/drm/i915/selftests/i915_gem_context.c > @@ -321,7 +321,7 @@ static int igt_ctx_exec(void *arg) > LIST_HEAD(objects); > unsigned long ncontexts, ndwords, dw; > bool first_shared_gtt = true; > - int err; > + int err = -ENODEV; > > /* Create a few different contexts (with different mm) and write > * through each ctx/mm using the GPU making sure those writes end > diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c > b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c > index 581296860539..d9560d8a6cc8 100644 > --- a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c > +++ b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c > @@ -699,7 +699,7 @@ static int drunk_hole(struct drm_i915_private *i915, > unsigned int *order, count, n; > struct i915_vma *vma; > u64 hole_size; > - int err; > + int err = -ENODEV; > > hole_size = (hole_end - hole_start) >> size; > if (hole_size > KMALLOC_MAX_SIZE / sizeof(u32)) > @@ -958,7 +958,7 @@ static int exercise_ggtt(struct drm_i915_private *i915, > u64 hole_start, hole_end, last = 0; > struct drm_mm_node *node; > IGT_TIMEOUT(end_time); > - int err; > + int err = -ENODEV; > > mutex_lock(&i915->drm.struct_mutex); > restart: > @@ -1164,7 +1164,7 @@ static int igt_gtt_reserve(void *arg) > struct drm_i915_gem_object *obj, *on; > LIST_HEAD(objects); > u64 total; > - int err; > + int err = -ENODEV; > > /* i915_gem_gtt_reserve() tries to reserve the precise range > * for the node, and evicts if it has to. So our test checks that > @@ -1355,7 +1355,7 @@ static int igt_gtt_insert(void *arg) > }, *ii; > LIST_HEAD(objects); > u64 total; > - int err; > + int err = -ENODEV; > > /* i915_gem_gtt_insert() tries to allocate some free space in the GTT > * to the node, evicting if required. > diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_request.c > b/drivers/gpu/drm/i915/selftests/i915_gem_request.c > index 9a35ebd5c876..e3871db78beb 100644 > --- a/drivers/gpu/drm/i915/selftests/i915_gem_request.c > +++ b/drivers/gpu/drm/i915/selftests/i915_gem_request.c > @@ -332,7 +332,7 @@ static int live_nop_request(void *arg) > struct intel_engine_cs *engine; > struct live_test t; > unsigned int id; > - int err; > + int err = -ENODEV; > > /* Submit various sized batches of empty requests, to each engine > * (individually), and wait for the batch to complete. We can check > diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_timeline.c > b/drivers/gpu/drm/i915/selftests/i915_gem_timeline.c > index 4795877abe56..3000e6a7d82d 100644 > --- a/drivers/gpu/drm/i915/selftests/i915_gem_timeline.c > +++ b/drivers/gpu/drm/i915/selftests/i915_gem_timeline.c > @@ -79,7 +79,7 @@ static int igt_sync(void *arg) > }, *p; > struct intel_timeline *tl; > int order, offset; > - int ret; > + int ret = -ENODEV; > > tl = mock_timeline(0); > if (!tl) > diff --git a/drivers/gpu/drm/i915/selftests/i915_syncmap.c > b/drivers/gpu/drm/i915/selftests/i915_syncmap.c > index bcab3d00a785..47f4ae18a1ef 100644 > --- a/drivers/gpu/drm/i915/selftests/i915_syncmap.c > +++ b/drivers/gpu/drm/i915/selftests/i915_syncmap.c > @@ -333,7 +333,7 @@ static int igt_syncmap_join_below(void *arg) > { > struct i915_syncmap *sync; > unsigned int step, order, idx; > - int err; > + int err = -ENODEV; > > i915_syncmap_init(&sync); > > @@ -402,7 +402,7 @@ static int igt_syncmap_neighbours(void *arg) > I915_RND_STATE(prng); > IGT_TIMEOUT(end_time); > struct i915_syncmap *sync; > - int err; > + int err = -ENODEV; > > /* > * Each leaf holds KSYNCMAP seqno. Check that when we create KSYNCMAP > @@ -447,7 +447,7 @@ static int igt_syncmap_compact(void *arg) > { > struct i915_syncmap *sync; > unsigned int idx, order; > - int err; > + int err = -ENODEV; > > i915_syncmap_init(&sync); > > diff --git a/drivers/gpu/drm/i915/selftests/i915_vma.c > b/drivers/gpu/drm/i915/selftests/i915_vma.c > index 2e86ec136b35..eb89e301b602 100644 > --- a/drivers/gpu/drm/i915/selftests/i915_vma.c > +++ b/drivers/gpu/drm/i915/selftests/i915_vma.c > @@ -150,7 +150,7 @@ static int igt_vma_create(void *arg) > IGT_TIMEOUT(end_time); > LIST_HEAD(contexts); > LIST_HEAD(objects); > - int err; > + int err = -ENOMEM; > > /* Exercise creating many vma amonst many objections, checking the > * vma creation and lookup routines. _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
