From f4d57d838c48ebb123f9032cca0e5697c457868f Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Mon, 10 Jun 2019 11:36:10 +0100 Subject: [PATCH] drm/i915: Allow interrupts when taking the timeline->mutex Before we commit ourselves to writing commands into the ringbuffer and submitting the request, allow signals to interrupt acquisition of the timeline mutex. We allow ourselves to be interrupted at any time later if we need to block for space in the ring, anyway. Signed-off-by: Chris Wilson Reviewed-by: Tvrtko Ursulin Link: https://patchwork.freedesktop.org/patch/msgid/20190610103610.19883-1-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/gt/intel_context.h | 5 +++-- drivers/gpu/drm/i915/i915_request.c | 5 ++++- 2 files changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/intel_context.h b/drivers/gpu/drm/i915/gt/intel_context.h index 63392c88cd98..6d5453ba2c1e 100644 --- a/drivers/gpu/drm/i915/gt/intel_context.h +++ b/drivers/gpu/drm/i915/gt/intel_context.h @@ -113,10 +113,11 @@ static inline void intel_context_put(struct intel_context *ce) kref_put(&ce->ref, ce->ops->destroy); } -static inline void intel_context_timeline_lock(struct intel_context *ce) +static inline int __must_check +intel_context_timeline_lock(struct intel_context *ce) __acquires(&ce->ring->timeline->mutex) { - mutex_lock(&ce->ring->timeline->mutex); + return mutex_lock_interruptible(&ce->ring->timeline->mutex); } static inline void intel_context_timeline_unlock(struct intel_context *ce) diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c index da1e6984a8cc..e9b59eea4f10 100644 --- a/drivers/gpu/drm/i915/i915_request.c +++ b/drivers/gpu/drm/i915/i915_request.c @@ -784,8 +784,11 @@ struct i915_request * i915_request_create(struct intel_context *ce) { struct i915_request *rq; + int err; - intel_context_timeline_lock(ce); + err = intel_context_timeline_lock(ce); + if (err) + return ERR_PTR(err); /* Move our oldest request to the slab-cache (if not in use!) */ rq = list_first_entry(&ce->ring->request_list, typeof(*rq), ring_link); -- 2.45.2