On Fri, Dec 11, 2015 at 02:59:09PM +0000, Nick Hoath wrote:
> Swap the order of context & engine cleanup, so that it is now
> contexts, then engines.
> This allows the context clean up code to do things like confirm
> that ring->dev->struct_mutex is locked without a NULL pointer
> dereference.
> This came about as a result of the 'intel_ring_initialized() must
> be simple and inline' patch now using ring->dev as an initialised
> flag.
> Rename the cleanup function to reflect what it actually does.
> Also clean up some very annoying whitespace issues at the same time.
>
> v2: Also make the fix in i915_load_modeset_init, not just
> in i915_driver_unload (Chris Wilson)
>
> Signed-off-by: Nick Hoath <nicholas.ho...@intel.com>
> Reviewed-by: Chris Wilson <ch...@chris-wilson.co.uk>
>
> Cc: Mika Kuoppala <mika.kuopp...@linux.intel.com>
> Cc: Daniel Vetter <daniel.vet...@ffwll.ch>
> Cc: David Gordon <david.s.gor...@intel.com>
> Cc: Chris Wilson <ch...@chris-wilson.co.uk>
Queued for -next, thanks for the patch.
-Daniel
> ---
> drivers/gpu/drm/i915/i915_dma.c | 4 ++--
> drivers/gpu/drm/i915/i915_drv.h | 2 +-
> drivers/gpu/drm/i915/i915_gem.c | 23 ++++++++++++-----------
> 3 files changed, 15 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
> index 84e2b20..4dad121 100644
> --- a/drivers/gpu/drm/i915/i915_dma.c
> +++ b/drivers/gpu/drm/i915/i915_dma.c
> @@ -449,8 +449,8 @@ static int i915_load_modeset_init(struct drm_device *dev)
>
> cleanup_gem:
> mutex_lock(&dev->struct_mutex);
> - i915_gem_cleanup_ringbuffer(dev);
> i915_gem_context_fini(dev);
> + i915_gem_cleanup_engines(dev);
> mutex_unlock(&dev->struct_mutex);
> cleanup_irq:
> intel_guc_ucode_fini(dev);
> @@ -1188,8 +1188,8 @@ int i915_driver_unload(struct drm_device *dev)
>
> intel_guc_ucode_fini(dev);
> mutex_lock(&dev->struct_mutex);
> - i915_gem_cleanup_ringbuffer(dev);
> i915_gem_context_fini(dev);
> + i915_gem_cleanup_engines(dev);
> mutex_unlock(&dev->struct_mutex);
> intel_fbc_cleanup_cfb(dev_priv);
> i915_gem_cleanup_stolen(dev);
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 5edd393..e317f88 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -3016,7 +3016,7 @@ int i915_gem_init_rings(struct drm_device *dev);
> int __must_check i915_gem_init_hw(struct drm_device *dev);
> int i915_gem_l3_remap(struct drm_i915_gem_request *req, int slice);
> void i915_gem_init_swizzling(struct drm_device *dev);
> -void i915_gem_cleanup_ringbuffer(struct drm_device *dev);
> +void i915_gem_cleanup_engines(struct drm_device *dev);
> int __must_check i915_gpu_idle(struct drm_device *dev);
> int __must_check i915_gem_suspend(struct drm_device *dev);
> void __i915_add_request(struct drm_i915_gem_request *req,
> diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
> index 8e2acde..04a22db 100644
> --- a/drivers/gpu/drm/i915/i915_gem.c
> +++ b/drivers/gpu/drm/i915/i915_gem.c
> @@ -4823,7 +4823,7 @@ i915_gem_init_hw(struct drm_device *dev)
>
> ret = i915_gem_request_alloc(ring, ring->default_context, &req);
> if (ret) {
> - i915_gem_cleanup_ringbuffer(dev);
> + i915_gem_cleanup_engines(dev);
> goto out;
> }
>
> @@ -4836,7 +4836,7 @@ i915_gem_init_hw(struct drm_device *dev)
> if (ret && ret != -EIO) {
> DRM_ERROR("PPGTT enable ring #%d failed %d\n", i, ret);
> i915_gem_request_cancel(req);
> - i915_gem_cleanup_ringbuffer(dev);
> + i915_gem_cleanup_engines(dev);
> goto out;
> }
>
> @@ -4844,7 +4844,7 @@ i915_gem_init_hw(struct drm_device *dev)
> if (ret && ret != -EIO) {
> DRM_ERROR("Context enable ring #%d failed %d\n", i,
> ret);
> i915_gem_request_cancel(req);
> - i915_gem_cleanup_ringbuffer(dev);
> + i915_gem_cleanup_engines(dev);
> goto out;
> }
>
> @@ -4919,7 +4919,7 @@ out_unlock:
> }
>
> void
> -i915_gem_cleanup_ringbuffer(struct drm_device *dev)
> +i915_gem_cleanup_engines(struct drm_device *dev)
> {
> struct drm_i915_private *dev_priv = dev->dev_private;
> struct intel_engine_cs *ring;
> @@ -4928,13 +4928,14 @@ i915_gem_cleanup_ringbuffer(struct drm_device *dev)
> for_each_ring(ring, dev_priv, i)
> dev_priv->gt.cleanup_ring(ring);
>
> - if (i915.enable_execlists)
> - /*
> - * Neither the BIOS, ourselves or any other kernel
> - * expects the system to be in execlists mode on startup,
> - * so we need to reset the GPU back to legacy mode.
> - */
> - intel_gpu_reset(dev);
> + if (i915.enable_execlists) {
> + /*
> + * Neither the BIOS, ourselves or any other kernel
> + * expects the system to be in execlists mode on startup,
> + * so we need to reset the GPU back to legacy mode.
> + */
> + intel_gpu_reset(dev);
> + }
> }
>
> static void
> --
> 1.9.1
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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