[PATCH] drm/i915: Fix wrong return value

Tianjia Zhang
2020-08-02T11:15:49Z

In function i915_active_acquire_preallocate_barrier(), not all
paths have the return value set correctly, and in case of memory
allocation failure, a negative error code should be returned.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
---
drivers/gpu/drm/i915/i915_active.c | 4 ++--
drivers/gpu/drm/i915/selftests/i915_request.c | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_active.c b/drivers/gpu/drm/i915/i915_active.c
index d960d0be5bd2..cc017e3cc9c5 100644
--- a/drivers/gpu/drm/i915/i915_active.c
+++ b/drivers/gpu/drm/i915/i915_active.c
@@ -758,7 +758,7 @@ int i915_active_acquire_preallocate_barrier(struct i915_active *ref,
intel_engine_mask_t tmp, mask = engine->mask;
struct llist_node *first = NULL, *last = NULL;
struct intel_gt *gt = engine->gt;
- int err;
+ int err = 0;

GEM_BUG_ON(i915_active_is_idle(ref));

@@ -782,7 +782,7 @@ int i915_active_acquire_preallocate_barrier(struct i915_active *ref,
if (!node) {
node = kmem_cache_alloc(global.slab_cache, GFP_KERNEL);
if (!node) {
- err = ENOMEM;
+ err = -ENOMEM;
goto unwind;
}

diff --git a/drivers/gpu/drm/i915/selftests/i915_request.c b/drivers/gpu/drm/i915/selftests/i915_request.c
index 6014e8dfcbb1..dda801a87b8a 100644
--- a/drivers/gpu/drm/i915/selftests/i915_request.c
+++ b/drivers/gpu/drm/i915/selftests/i915_request.c
@@ -326,7 +326,7 @@ static int __igt_breadcrumbs_smoketest(void *arg)
if (!wait) {
i915_sw_fence_commit(submit);
heap_fence_put(submit);
- err = ENOMEM;
+ err = -ENOMEM;
break;
}

--
2.26.2