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drm/i915: Mark up potential allocation paths within i915_sw_fence as might_sleep 

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@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171212180652.22061-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2017-12-12 18:06:50 +00:00
parent d7dc4131eb
commit e30a7581bf
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/i915/i915_sw_fence.c
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@ -303,6 +303,7 @@ static int __i915_sw_fence_await_sw_fence(struct i915_sw_fence *fence,
int pending; int pending;
debug_fence_assert(fence); debug_fence_assert(fence);
might_sleep_if(gfpflags_allow_blocking(gfp));
if (i915_sw_fence_done(signaler)) if (i915_sw_fence_done(signaler))
return 0; return 0;
@ -419,6 +420,7 @@ int i915_sw_fence_await_dma_fence(struct i915_sw_fence *fence,
int ret; int ret;
debug_fence_assert(fence); debug_fence_assert(fence);
might_sleep_if(gfpflags_allow_blocking(gfp));
if (dma_fence_is_signaled(dma)) if (dma_fence_is_signaled(dma))
return 0; return 0;
@ -465,6 +467,7 @@ int i915_sw_fence_await_reservation(struct i915_sw_fence *fence,
int ret = 0, pending; int ret = 0, pending;
debug_fence_assert(fence); debug_fence_assert(fence);
might_sleep_if(gfpflags_allow_blocking(gfp));
if (write) { if (write) {
struct dma_fence **shared; struct dma_fence **shared;