[10/12] drm/i915: Annotate dma_fence waits
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Message ID 20181102091531.7775-10-daniel.vetter@ffwll.ch
State New
Headers show
Series
  • [01/12] locking/lockdep: restore cross-release checks
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Commit Message

Daniel Vetter Nov. 2, 2018, 9:15 a.m. UTC
i915_request_wait is simply our i915-optimized version of
dma_fence_wait. They both use the exact same code. To help lockdep
discovering all the dependencies, annotate it.

Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: intel-gfx@lists.freedesktop.org
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
---
 drivers/gpu/drm/i915/i915_request.c | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

Patch
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diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c
index 71107540581d..6b9722782d12 100644
--- a/drivers/gpu/drm/i915/i915_request.c
+++ b/drivers/gpu/drm/i915/i915_request.c
@@ -30,6 +30,10 @@ 
 
 #include "i915_drv.h"
 
+static long __i915_request_wait(struct i915_request *rq,
+				unsigned int flags,
+				long timeout);
+
 static const char *i915_fence_get_driver_name(struct dma_fence *fence)
 {
 	return "i915";
@@ -66,7 +70,7 @@  static signed long i915_fence_wait(struct dma_fence *fence,
 				   bool interruptible,
 				   signed long timeout)
 {
-	return i915_request_wait(to_request(fence), interruptible, timeout);
+	return __i915_request_wait(to_request(fence), interruptible, timeout);
 }
 
 static void i915_fence_release(struct dma_fence *fence)
@@ -1201,6 +1205,19 @@  static bool __i915_wait_request_check_and_reset(struct i915_request *request)
 long i915_request_wait(struct i915_request *rq,
 		       unsigned int flags,
 		       long timeout)
+{
+	long ret;
+
+	dma_fence_wait_acquire();
+	ret = __i915_request_wait(rq, flags, timeout);
+	dma_fence_wait_release();
+
+	return ret;
+}
+
+static long __i915_request_wait(struct i915_request *rq,
+				unsigned int flags,
+				long timeout)
 {
 	const int state = flags & I915_WAIT_INTERRUPTIBLE ?
 		TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE;