From: Chris Wilson Date: Tue, 23 Nov 2010 15:26:33 +0000 (+0000) Subject: drm/i915: Mark a few functions as __must_check X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=2021746e1d5ad1e3b51e24480c566acbb833c7c1;p=linux-beck.git drm/i915: Mark a few functions as __must_check ... to benefit from the compiler checking that we remember to handle and propagate errors. Signed-off-by: Chris Wilson --- diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index ee7df1d2b8c8..b6ca10ade426 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1093,11 +1093,11 @@ int i915_gem_init_object(struct drm_gem_object *obj); struct drm_i915_gem_object *i915_gem_alloc_object(struct drm_device *dev, size_t size); void i915_gem_free_object(struct drm_gem_object *obj); -int i915_gem_object_pin(struct drm_i915_gem_object *obj, - uint32_t alignment, - bool map_and_fenceable); +int __must_check i915_gem_object_pin(struct drm_i915_gem_object *obj, + uint32_t alignment, + bool map_and_fenceable); void i915_gem_object_unpin(struct drm_i915_gem_object *obj); -int i915_gem_object_unbind(struct drm_i915_gem_object *obj); +int __must_check i915_gem_object_unbind(struct drm_i915_gem_object *obj); void i915_gem_release_mmap(struct drm_i915_gem_object *obj); void i915_gem_lastclose(struct drm_device *dev); @@ -1110,37 +1110,42 @@ i915_seqno_passed(uint32_t seq1, uint32_t seq2) return (int32_t)(seq1 - seq2) >= 0; } -int i915_gem_object_get_fence_reg(struct drm_i915_gem_object *obj, - bool interruptible); -int i915_gem_object_put_fence_reg(struct drm_i915_gem_object *obj, - bool interruptible); +int __must_check i915_gem_object_get_fence_reg(struct drm_i915_gem_object *obj, + bool interruptible); +int __must_check i915_gem_object_put_fence_reg(struct drm_i915_gem_object *obj, + bool interruptible); + void i915_gem_retire_requests(struct drm_device *dev); void i915_gem_reset(struct drm_device *dev); void i915_gem_clflush_object(struct drm_i915_gem_object *obj); -int i915_gem_object_set_domain(struct drm_i915_gem_object *obj, - uint32_t read_domains, - uint32_t write_domain); -int i915_gem_object_flush_gpu(struct drm_i915_gem_object *obj, - bool interruptible); -int i915_gem_init_ringbuffer(struct drm_device *dev); +int __must_check i915_gem_object_set_domain(struct drm_i915_gem_object *obj, + uint32_t read_domains, + uint32_t write_domain); +int __must_check i915_gem_object_flush_gpu(struct drm_i915_gem_object *obj, + bool interruptible); +int __must_check i915_gem_init_ringbuffer(struct drm_device *dev); void i915_gem_cleanup_ringbuffer(struct drm_device *dev); -int i915_gem_do_init(struct drm_device *dev, unsigned long start, - unsigned long mappable_end, unsigned long end); -int i915_gpu_idle(struct drm_device *dev); -int i915_gem_idle(struct drm_device *dev); -int i915_add_request(struct drm_device *dev, - struct drm_file *file_priv, - struct drm_i915_gem_request *request, - struct intel_ring_buffer *ring); -int i915_do_wait_request(struct drm_device *dev, - uint32_t seqno, - bool interruptible, - struct intel_ring_buffer *ring); +void i915_gem_do_init(struct drm_device *dev, + unsigned long start, + unsigned long mappable_end, + unsigned long end); +int __must_check i915_gpu_idle(struct drm_device *dev); +int __must_check i915_gem_idle(struct drm_device *dev); +int __must_check i915_add_request(struct drm_device *dev, + struct drm_file *file_priv, + struct drm_i915_gem_request *request, + struct intel_ring_buffer *ring); +int __must_check i915_do_wait_request(struct drm_device *dev, + uint32_t seqno, + bool interruptible, + struct intel_ring_buffer *ring); int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf); -int i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, - int write); -int i915_gem_object_set_to_display_plane(struct drm_i915_gem_object *obj, - struct intel_ring_buffer *pipelined); +int __must_check +i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, + bool write); +int __must_check +i915_gem_object_set_to_display_plane(struct drm_i915_gem_object *obj, + struct intel_ring_buffer *pipelined); int i915_gem_attach_phys_object(struct drm_device *dev, struct drm_i915_gem_object *obj, int id, @@ -1152,14 +1157,16 @@ void i915_gem_release(struct drm_device *dev, struct drm_file *file); /* i915_gem_gtt.c */ void i915_gem_restore_gtt_mappings(struct drm_device *dev); -int i915_gem_gtt_bind_object(struct drm_i915_gem_object *obj); +int __must_check i915_gem_gtt_bind_object(struct drm_i915_gem_object *obj); void i915_gem_gtt_unbind_object(struct drm_i915_gem_object *obj); /* i915_gem_evict.c */ -int i915_gem_evict_something(struct drm_device *dev, int min_size, - unsigned alignment, bool mappable); -int i915_gem_evict_everything(struct drm_device *dev, bool purgeable_only); -int i915_gem_evict_inactive(struct drm_device *dev, bool purgeable_only); +int __must_check i915_gem_evict_something(struct drm_device *dev, int min_size, + unsigned alignment, bool mappable); +int __must_check i915_gem_evict_everything(struct drm_device *dev, + bool purgeable_only); +int __must_check i915_gem_evict_inactive(struct drm_device *dev, + bool purgeable_only); /* i915_gem_tiling.c */ void i915_gem_detect_bit_6_swizzle(struct drm_device *dev); diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 939c9e34ce96..f6167c55a649 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -215,27 +215,19 @@ i915_gem_object_is_inactive(struct drm_i915_gem_object *obj) return obj->gtt_space && !obj->active && obj->pin_count == 0; } -int i915_gem_do_init(struct drm_device *dev, - unsigned long start, - unsigned long mappable_end, - unsigned long end) +void i915_gem_do_init(struct drm_device *dev, + unsigned long start, + unsigned long mappable_end, + unsigned long end) { drm_i915_private_t *dev_priv = dev->dev_private; - if (start >= end || - (start & (PAGE_SIZE - 1)) != 0 || - (end & (PAGE_SIZE - 1)) != 0) { - return -EINVAL; - } - drm_mm_init(&dev_priv->mm.gtt_space, start, end - start); dev_priv->mm.gtt_total = end - start; dev_priv->mm.mappable_gtt_total = min(end, mappable_end) - start; dev_priv->mm.gtt_mappable_end = mappable_end; - - return 0; } int @@ -243,13 +235,16 @@ i915_gem_init_ioctl(struct drm_device *dev, void *data, struct drm_file *file) { struct drm_i915_gem_init *args = data; - int ret; + + if (args->gtt_start >= args->gtt_end || + (args->gtt_end | args->gtt_start) & (PAGE_SIZE - 1)) + return -EINVAL; mutex_lock(&dev->struct_mutex); - ret = i915_gem_do_init(dev, args->gtt_start, args->gtt_end, args->gtt_end); + i915_gem_do_init(dev, args->gtt_start, args->gtt_end, args->gtt_end); mutex_unlock(&dev->struct_mutex); - return ret; + return 0; } int @@ -2949,7 +2944,7 @@ i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object *obj) * flushes to occur. */ int -i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, int write) +i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write) { uint32_t old_write_domain, old_read_domains; int ret; @@ -5177,8 +5172,8 @@ rescan: &dev_priv->mm.inactive_list, mm_list) { if (i915_gem_object_is_purgeable(obj)) { - i915_gem_object_unbind(obj); - if (--nr_to_scan == 0) + if (i915_gem_object_unbind(obj) == 0 && + --nr_to_scan == 0) break; } } @@ -5188,10 +5183,10 @@ rescan: list_for_each_entry_safe(obj, next, &dev_priv->mm.inactive_list, mm_list) { - if (nr_to_scan) { - i915_gem_object_unbind(obj); + if (nr_to_scan && + i915_gem_object_unbind(obj) == 0) nr_to_scan--; - } else + else cnt++; }