From: Chris Wilson Date: Fri, 27 Mar 2015 11:01:36 +0000 (+0000) Subject: drm/i915: Add i915_gem_request_unreference__unlocked X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=41037f9f0e299f72e062cb508371906810fcedde;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git drm/i915: Add i915_gem_request_unreference__unlocked We were missing a convenience stub to aquire the right mutex whilst dropping the request, so add it. Signed-off-by: Chris Wilson Reviewed-by: Tvrtko Ursulin Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index e326ac9730cf..4ef320c17b63 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -2142,6 +2142,19 @@ i915_gem_request_unreference(struct drm_i915_gem_request *req) kref_put(&req->ref, i915_gem_request_free); } +static inline void +i915_gem_request_unreference__unlocked(struct drm_i915_gem_request *req) +{ + if (req && !atomic_add_unless(&req->ref.refcount, -1, 1)) { + struct drm_device *dev = req->ring->dev; + + mutex_lock(&dev->struct_mutex); + if (likely(atomic_dec_and_test(&req->ref.refcount))) + i915_gem_request_free(&req->ref); + mutex_unlock(&dev->struct_mutex); + } +} + static inline void i915_gem_request_assign(struct drm_i915_gem_request **pdst, struct drm_i915_gem_request *src) { diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index d07c0b1fb498..3a9136584833 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -2866,9 +2866,7 @@ i915_gem_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file) ret = __i915_wait_request(req, reset_counter, true, args->timeout_ns > 0 ? &args->timeout_ns : NULL, file->driver_priv); - mutex_lock(&dev->struct_mutex); - i915_gem_request_unreference(req); - mutex_unlock(&dev->struct_mutex); + i915_gem_request_unreference__unlocked(req); return ret; out: @@ -4071,9 +4069,7 @@ i915_gem_ring_throttle(struct drm_device *dev, struct drm_file *file) if (ret == 0) queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, 0); - mutex_lock(&dev->struct_mutex); - i915_gem_request_unreference(target); - mutex_unlock(&dev->struct_mutex); + i915_gem_request_unreference__unlocked(target); return ret; }