From 0c912c79eede0ba3dcc717a6e13de8766404c736 Mon Sep 17 00:00:00 2001 From: Damien Lespiau Date: Tue, 15 Oct 2013 18:55:37 +0100 Subject: [PATCH] drm/i915: Warn if we receive an interrupt after freeing the buffer This shouldn't happen as the buffer is freed after disable pipe CRCs, but better be safe than sorry. Signed-off-by: Damien Lespiau Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_irq.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 0b218285c2c1..b201a214279e 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -1197,6 +1197,11 @@ static void ivb_pipe_crc_update(struct drm_device *dev, enum pipe pipe) struct intel_pipe_crc_entry *entry; int head, tail; + if (!pipe_crc->entries) { + DRM_ERROR("spurious interrupt\n"); + return; + } + head = atomic_read(&pipe_crc->head); tail = atomic_read(&pipe_crc->tail);