From: Chris Wilson Date: Tue, 22 Nov 2016 14:41:20 +0000 (+0000) Subject: drm/i915: Complete requests in nop_submit_request X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=ce1135c7de646bd608784657471b934d6e50195d;p=linux-beck.git drm/i915: Complete requests in nop_submit_request Since the submit/execute split in commit d55ac5bf97c6 ("drm/i915: Defer transfer onto execution timeline to actual hw submission") the global seqno advance was deferred until the submit_request callback. After wedging the GPU, we were installing a nop_submit_request handler (to avoid waking up the dead hw) but I had missed converting this over to the new scheme. Under the new scheme, we have to explicitly call i915_gem_submit_request() from the submit_request handler to mark the request as on the hardware. If we don't the request is always pending, and any waiter will continue to wait indefinitely and hangcheck will not be able to resolve the lockup. References: https://bugs.freedesktop.org/show_bug.cgi?id=98748 Testcase: igt/gem_eio/in-flight Fixes: d55ac5bf97c6 ("drm/i915: Defer transfer onto execution timeline to actual hw submission") Signed-off-by: Chris Wilson Cc: Tvrtko Ursulin Reviewed-by: Tvrtko Ursulin Link: http://patchwork.freedesktop.org/patch/msgid/20161122144121.7379-3-chris@chris-wilson.co.uk (cherry picked from commit 3dcf93f7f23a61e867a5ccadaf651cb2d29229fd) Signed-off-by: Jani Nikula --- diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 902fa427c196..d0dcaf35b429 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -2764,6 +2764,8 @@ void i915_gem_reset(struct drm_i915_private *dev_priv) static void nop_submit_request(struct drm_i915_gem_request *request) { + i915_gem_request_submit(request); + intel_engine_init_global_seqno(request->engine, request->global_seqno); } static void i915_gem_cleanup_engine(struct intel_engine_cs *engine)