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[23.128.96.18]) by mx.google.com with ESMTP id v26si129743ejk.0.2021.06.17.13.51.50; Thu, 17 Jun 2021 13:52:13 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@ffwll.ch header.s=google header.b=LlfNDK0U; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232031AbhFQTUB (ORCPT + 99 others); Thu, 17 Jun 2021 15:20:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44440 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230484AbhFQTUB (ORCPT ); Thu, 17 Jun 2021 15:20:01 -0400 Received: from mail-wm1-x32e.google.com (mail-wm1-x32e.google.com [IPv6:2a00:1450:4864:20::32e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 02C91C061574 for ; Thu, 17 Jun 2021 12:17:51 -0700 (PDT) Received: by mail-wm1-x32e.google.com with SMTP id l9so4133287wms.1 for ; Thu, 17 Jun 2021 12:17:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ffwll.ch; s=google; h=date:from:to:cc:subject:message-id:mail-followup-to:references :mime-version:content-disposition:in-reply-to; bh=cyKaQCeyHLS4EathuQVksg4S7Jponx+EApTJ2kRHanM=; b=LlfNDK0UOBDhPM4icZWg0U1hqnlUirGnt9g8bDduYnZVgb74v7YtAJu5ZSszaIchx+ 1LglqLJkgtMk9YvpMJr3gbLNb5va96BbmIPqUbvW4vo2Xnb+kxt/1NqcRXqjks1lNgvg uci7OCDYW5WAFt6GYfi/zQwwZbiTt26k/coDA= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id :mail-followup-to:references:mime-version:content-disposition :in-reply-to; bh=cyKaQCeyHLS4EathuQVksg4S7Jponx+EApTJ2kRHanM=; b=OkekbYuEjnPBC/jCkQTgXImEknVhtB7xxlPRCzZ/twjUb9iIWHTLPF7mZVI333Tevw +VfwHmxEpQHSPX3y8UB/rEJqcZYz7K5IkEtH0DOLGFCgVOW2VUvJxL4Iu3XykudNVb8l mEkqVakaSBY3mhK/r1mJI9yJMppAylSj1YyT+kvX6TxJfhnxpQ3E0CUKYljDQPpNOlhD K9xcH8KWUVFonO+VAcL4QH3IOS1ObYCnEGQOh6mfrI4oETC8gTDUJtvMc0mxOTNvqdck OMtjl6MwQodkNSeyJhH3gI13MtZP4aVzRL083hWqQyw9gvzGBfcTPyuAQIkBvlW5Wp4X Zfsw== X-Gm-Message-State: AOAM533oJTHMcBLf1ffI8pKtxTgRifM+vB7jZh3LsUmUXPA/OxSgrP3t xv1RuCWuIUlIcK6vdbywoBHdRw== X-Received: by 2002:a1c:df09:: with SMTP id w9mr3003192wmg.91.1623957470485; Thu, 17 Jun 2021 12:17:50 -0700 (PDT) Received: from phenom.ffwll.local ([2a02:168:57f4:0:efd0:b9e5:5ae6:c2fa]) by smtp.gmail.com with ESMTPSA id w23sm9415180wmi.0.2021.06.17.12.17.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Jun 2021 12:17:50 -0700 (PDT) Date: Thu, 17 Jun 2021 21:17:48 +0200 From: Daniel Vetter To: Qiang Ma Cc: maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@linux.ie, daniel@ffwll.ch, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] drm/auth: Move master pointer from drm_device to drm_file Message-ID: Mail-Followup-To: Qiang Ma , maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@linux.ie, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org References: <20210617094733.8429-1-maqianga@uniontech.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210617094733.8429-1-maqianga@uniontech.com> X-Operating-System: Linux phenom 5.10.0-7-amd64 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jun 17, 2021 at 05:47:33PM +0800, Qiang Ma wrote: > The drm_file pointer clears to zero during multi-user switching, > so it needs to call drm_new_set_master for master pointer from drm_file. That sounds like a bug. drm_file->master should be always the same - either you become a new stand-alone thing, our you get linked to the current master. Or I'm completely missing what you're trying to fix here. -Daniel > > Signed-off-by: Qiang Ma > --- > drivers/gpu/drm/drm_auth.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/drm_auth.c b/drivers/gpu/drm/drm_auth.c > index f2d46b7ac6f9..02431af6d0c5 100644 > --- a/drivers/gpu/drm/drm_auth.c > +++ b/drivers/gpu/drm/drm_auth.c > @@ -302,7 +302,7 @@ int drm_master_open(struct drm_file *file_priv) > /* if there is no current master make this fd it, but do not create > * any master object for render clients */ > mutex_lock(&dev->master_mutex); > - if (!dev->master) > + if (!file_priv->master) > ret = drm_new_set_master(dev, file_priv); > else > file_priv->master = drm_master_get(dev->master); > -- > 2.20.1 > > > -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch