forked from Minki/linux
drm/i915/guc: Fix a memory leak where guc->execbuf_client is not freed
During driver unloading, the guc_client created for command submission needs to be released to avoid memory leak. The struct_mutex needs to be held before tearing down GuC. v1: Move i915_guc_submission_disable out of i915_guc_submission_fini and take struct_mutex lock before release GuC client. (Dave Gordon) v2: Add the locking for failure case in guc_fw_fetch. (Dave Gordon) Add i915_guc_submission_fini for failure case in intel_guc_ucode_load. Signed-off-by: Alex Dai <yu.dai@intel.com> Reviewed-by: Dave Gordon <david.s.gordon@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1452711710-4505-1-git-send-email-yu.dai@intel.com
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@ -445,6 +445,7 @@ fail:
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direct_interrupts_to_host(dev_priv);
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i915_guc_submission_disable(dev);
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i915_guc_submission_fini(dev);
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return err;
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}
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@ -561,10 +562,12 @@ fail:
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DRM_ERROR("Failed to fetch GuC firmware from %s (error %d)\n",
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guc_fw->guc_fw_path, err);
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mutex_lock(&dev->struct_mutex);
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obj = guc_fw->guc_fw_obj;
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if (obj)
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drm_gem_object_unreference(&obj->base);
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guc_fw->guc_fw_obj = NULL;
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mutex_unlock(&dev->struct_mutex);
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release_firmware(fw); /* OK even if fw is NULL */
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guc_fw->guc_fw_fetch_status = GUC_FIRMWARE_FAIL;
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@ -631,10 +634,11 @@ void intel_guc_ucode_fini(struct drm_device *dev)
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struct drm_i915_private *dev_priv = dev->dev_private;
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struct intel_guc_fw *guc_fw = &dev_priv->guc.guc_fw;
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mutex_lock(&dev->struct_mutex);
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direct_interrupts_to_host(dev_priv);
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i915_guc_submission_disable(dev);
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i915_guc_submission_fini(dev);
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mutex_lock(&dev->struct_mutex);
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if (guc_fw->guc_fw_obj)
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drm_gem_object_unreference(&guc_fw->guc_fw_obj->base);
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guc_fw->guc_fw_obj = NULL;
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