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drm/atomic: Call ww_acquire_done after check phase is complete

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We want to make sure that no one tries to acquire more locks and
states, and ww mutexes provide debug facilities for that. So use them.

v2: Only call acquire_done when ->atomic_check was successful to avoid
falling over an -EDEADLK (spotted by Maarten).

Cc: Rob Clark <robdclark@gmail.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
This commit is contained in:
Daniel Vetter 2015-08-06 15:06:40 +02:00
parent 460e8e2cf4
commit 992cbf19b3
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/drm_atomic.c
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@ -1230,6 +1230,9 @@ int drm_atomic_check_only(struct drm_atomic_state *state)
}
}
if (ret == 0)
ww_acquire_done(&state->acquire_ctx->ww_ctx);
return ret;
}
EXPORT_SYMBOL(drm_atomic_check_only);