From d3df42b76f583c6c4c6235a1b44339505eaff559 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Thu, 16 Mar 2017 17:13:05 +0000 Subject: [PATCH] drm/i915: Wait for reset to complete before returning from debugfs/i915_wedged Provide some serialisation between user operations by waiting for the reset initiated by setting i915_wedged to complete. The automatic wait here makes echo 1 > i915_wedged; cat i915_error_state do the right thing, and not risk reporting "No error collected". Signed-off-by: Chris Wilson Cc: Tvrtko Ursulin Cc: Mika Kuoppala Reviewed-by: Mika Kuoppala Link: http://patchwork.freedesktop.org/patch/msgid/20170316171305.12972-4-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/i915_debugfs.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index d62cf2e..aea51fb 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -4135,6 +4135,10 @@ i915_wedged_set(void *data, u64 val) i915_handle_error(dev_priv, val, "Manually setting wedged to %llu", val); + wait_on_bit(&dev_priv->gpu_error.flags, + I915_RESET_HANDOFF, + TASK_UNINTERRUPTIBLE); + return 0; } -- 2.7.4