There is a report on RT about "BUG: scheduling while atomic" because the sleeping lock is taken in tracing context. This patch simply moves locking operation out of the tracing macro.
Reported-by: Joakim Hernberg jbh@alchemy.lu [C.Emde@osadl.org: pull out seqno and define it so it compiled] Signed-off-by: Sebastian Andrzej Siewior bigeasy@linutronix.de --- drivers/gpu/drm/i915/i915_gem_execbuffer.c | 5 ++++- drivers/gpu/drm/i915/i915_trace.h | 1 - drivers/gpu/drm/i915/intel_ringbuffer.h | 2 ++ 3 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c index 87a3227..fa5b45f 100644 --- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c @@ -844,6 +844,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data, struct intel_ring_buffer *ring; u32 ctx_id = i915_execbuffer2_get_context_id(*args); u32 exec_start, exec_len; + u32 seqno; u32 mask, flags; int ret, mode, i; bool need_relocs; @@ -1081,7 +1082,9 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data, goto err; }
- trace_i915_gem_ring_dispatch(ring, intel_ring_get_seqno(ring), flags); + seqno = intel_ring_get_seqno(ring); + trace_i915_gem_ring_dispatch(ring, seqno, flags); + i915_trace_irq_get(ring, seqno);
i915_gem_execbuffer_move_to_active(&eb->objects, ring); i915_gem_execbuffer_retire_commands(dev, file, ring, batch_obj); diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h index 3db4a68..29217db 100644 --- a/drivers/gpu/drm/i915/i915_trace.h +++ b/drivers/gpu/drm/i915/i915_trace.h @@ -244,7 +244,6 @@ TRACE_EVENT(i915_gem_ring_dispatch, __entry->ring = ring->id; __entry->seqno = seqno; __entry->flags = flags; - i915_trace_irq_get(ring, seqno); ),
TP_printk("dev=%u, ring=%u, seqno=%u, flags=%x", diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h index 799f04c..13ffe58 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.h +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h @@ -262,8 +262,10 @@ static inline u32 intel_ring_get_seqno(struct intel_ring_buffer *ring)
static inline void i915_trace_irq_get(struct intel_ring_buffer *ring, u32 seqno) { +#ifdef CONFIG_TRACEPOINTS if (ring->trace_irq_seqno == 0 && ring->irq_get(ring)) ring->trace_irq_seqno = seqno; +#endif }
/* DRI warts */