diff options
| -rw-r--r-- | drivers/gpu/drm/i915/intel_uncore.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c index 1deb1a4342ba..eb38392a2435 100644 --- a/drivers/gpu/drm/i915/intel_uncore.c +++ b/drivers/gpu/drm/i915/intel_uncore.c @@ -1600,6 +1600,8 @@ static int gen6_reset_engines(struct drm_i915_private *dev_priv, * (I915_READ_FW(reg) & mask) == value * * Otherwise, the wait will timeout after @slow_timeout_ms milliseconds. + * For atomic context @slow_timeout_ms must be zero and @fast_timeout_us + * must be not larger than 10 microseconds. * * Note that this routine assumes the caller holds forcewake asserted, it is * not suitable for very long waits. See intel_wait_for_register() if you @@ -1620,6 +1622,9 @@ int __intel_wait_for_register_fw(struct drm_i915_private *dev_priv, #define done (((reg_value = I915_READ_FW(reg)) & mask) == value) int ret; + /* Catch any overuse of this function */ + might_sleep_if(fast_timeout_us > 10 || slow_timeout_ms); + if (fast_timeout_us > 10) ret = _wait_for(done, fast_timeout_us, 10); else |