From: Chris Wilson Date: Tue, 26 Jul 2016 11:01:52 +0000 (+0100) Subject: drm/i915: Only clear the client pointer when tearing down the file X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=15f7bbc7351da8a5568c75ac09f142da78077a1d;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git drm/i915: Only clear the client pointer when tearing down the file Upon release of the file (i.e. the user calls close(fd)), we decouple all objects from the client list so that we don't chase the dangling file_priv. As we always inspect file_priv first, we only need to nullify that pointer and can safely ignore the list_head. Signed-off-by: Chris Wilson Link: http://patchwork.freedesktop.org/patch/msgid/1469432687-22756-4-git-send-email-chris@chris-wilson.co.uk Reviewed-by: Joonas Lahtinen Link: http://patchwork.freedesktop.org/patch/msgid/1469530913-17180-3-git-send-email-chris@chris-wilson.co.uk --- diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index c8436639b3ed..3730aecc1eae 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -4745,21 +4745,15 @@ int i915_gem_freeze_late(struct drm_i915_private *dev_priv) void i915_gem_release(struct drm_device *dev, struct drm_file *file) { struct drm_i915_file_private *file_priv = file->driver_priv; + struct drm_i915_gem_request *request; /* Clean up our request list when the client is going away, so that * later retire_requests won't dereference our soon-to-be-gone * file_priv. */ spin_lock(&file_priv->mm.lock); - while (!list_empty(&file_priv->mm.request_list)) { - struct drm_i915_gem_request *request; - - request = list_first_entry(&file_priv->mm.request_list, - struct drm_i915_gem_request, - client_list); - list_del(&request->client_list); + list_for_each_entry(request, &file_priv->mm.request_list, client_list) request->file_priv = NULL; - } spin_unlock(&file_priv->mm.lock); if (!list_empty(&file_priv->rps.link)) {