[Intel-gfx] [PATCH 1/3] drm/i915: Mark up potential allocation paths within i915_sw_fence as might_sleep

[Chris Wilson]

As kmalloc is allowed to block (if given the right flags), mark up the
two i915_sw_fence routines that may call kmalloc as potential sleeping
routines.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
---
 drivers/gpu/drm/i915/i915_sw_fence.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_sw_fence.c b/drivers/gpu/drm/i915/i915_sw_fence.c
index e8ca67a129d2..1212b04604be 100644
--- a/drivers/gpu/drm/i915/i915_sw_fence.c
+++ b/drivers/gpu/drm/i915/i915_sw_fence.c
@@ -303,6 +303,7 @@ static int __i915_sw_fence_await_sw_fence(struct i915_sw_fence *fence,
 	int pending;
 
 	debug_fence_assert(fence);
+	might_sleep_if(gfpflags_allow_blocking(gfp));
 
 	if (i915_sw_fence_done(signaler))
 		return 0;
@@ -418,6 +419,7 @@ int i915_sw_fence_await_dma_fence(struct i915_sw_fence *fence,
 	int ret;
 
 	debug_fence_assert(fence);
+	might_sleep_if(gfpflags_allow_blocking(gfp));
 
 	if (dma_fence_is_signaled(dma))
 		return 0;
@@ -464,6 +466,7 @@ int i915_sw_fence_await_reservation(struct i915_sw_fence *fence,
 	int ret = 0, pending;
 
 	debug_fence_assert(fence);
+	might_sleep_if(gfpflags_allow_blocking(gfp));
 
 	if (write) {
 		struct dma_fence **shared;
-- 
2.15.1