From 4796054b381a586f4177a24e3d8b5a6a0a32ce62 Mon Sep 17 00:00:00 2001 From: Nathan Chancellor Date: Tue, 24 Aug 2021 15:54:25 -0700 Subject: [PATCH] drm/i915/selftests: Do not use import_obj uninitialized MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Clang warns a couple of times: drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c:63:6: warning: variable 'import_obj' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized] if (import != &obj->base) { ^~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c:80:22: note: uninitialized use occurs here i915_gem_object_put(import_obj); ^~~~~~~~~~ drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c:63:2: note: remove the 'if' if its condition is always false if (import != &obj->base) { ^~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c:38:46: note: initialize the variable 'import_obj' to silence this warning struct drm_i915_gem_object *obj, *import_obj; ^ = NULL Shuffle the import_obj initialization above these if statements so that it is not used uninitialized. Fixes: d7b2cb380b3a ("drm/i915/gem: Correct the locking and pin pattern for dma-buf (v8)") Reported-by: Dan Carpenter Reviewed-by: Thomas Hellström Signed-off-by: Nathan Chancellor Signed-off-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/20210824225427.2065517-2-nathan@kernel.org --- drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c index ffae7df5e4d7..532c7955b300 100644 --- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c @@ -59,13 +59,13 @@ static int igt_dmabuf_import_self(void *arg) err = PTR_ERR(import); goto out_dmabuf; } + import_obj = to_intel_bo(import); if (import != &obj->base) { pr_err("i915_gem_prime_import created a new object!\n"); err = -EINVAL; goto out_import; } - import_obj = to_intel_bo(import); i915_gem_object_lock(import_obj, NULL); err = __i915_gem_object_get_pages(import_obj); @@ -176,6 +176,7 @@ static int igt_dmabuf_import_same_driver(struct drm_i915_private *i915, err = PTR_ERR(import); goto out_dmabuf; } + import_obj = to_intel_bo(import); if (import == &obj->base) { pr_err("i915_gem_prime_import reused gem object!\n"); @@ -183,8 +184,6 @@ static int igt_dmabuf_import_same_driver(struct drm_i915_private *i915, goto out_import; } - import_obj = to_intel_bo(import); - i915_gem_object_lock(import_obj, NULL); err = __i915_gem_object_get_pages(import_obj); if (err) { -- 2.11.0