From patchwork Sun Jun 3 14:40:59 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mikulas Patocka X-Patchwork-Id: 10445383 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 058756022E for ; Sun, 3 Jun 2018 15:19:22 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E9837289ED for ; Sun, 3 Jun 2018 15:19:21 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DDFDF28ACB; Sun, 3 Jun 2018 15:19:21 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 91A14289ED for ; Sun, 3 Jun 2018 15:19:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751634AbeFCPTV (ORCPT ); Sun, 3 Jun 2018 11:19:21 -0400 Received: from 109-183-129-149.tmcz.cz ([109.183.129.149]:59032 "EHLO leontynka.twibright.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751593AbeFCPTU (ORCPT ); Sun, 3 Jun 2018 11:19:20 -0400 Received: from root by leontynka.twibright.com with local (Exim 4.89) (envelope-from ) id 1fPUD7-0003qN-Hp; Sun, 03 Jun 2018 16:42:21 +0200 Message-Id: <20180603144221.252346438@twibright.com> User-Agent: quilt/0.63-1 Date: Sun, 03 Jun 2018 16:40:59 +0200 From: Mikulas Patocka To: Mikulas Patocka , Bartlomiej Zolnierkiewicz , Dave Airlie , Bernie Thompson , Ladislav Michl Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org Subject: [PATCH 06/21] udl-kms: make a local copy of fb_ops References: <20180603144053.875668929@twibright.com> MIME-Version: 1.0 Content-Disposition: inline; filename=udlkms-copy-fbops.patch Sender: linux-fbdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The defio subsystem overwrites the method fb_osp->mmap. That method is stored in module's static data - and that means that if we have multiple diplaylink adapters, they will over write each other's method. In order to avoid interference between multiple adapters, we copy the fb_ops structure to a device-local memory. Signed-off-by: Mikulas Patocka Cc: stable@vger.kernel.org --- drivers/gpu/drm/udl/udl_fb.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Index: linux-4.17-rc7/drivers/gpu/drm/udl/udl_fb.c =================================================================== --- linux-4.17-rc7.orig/drivers/gpu/drm/udl/udl_fb.c 2018-06-03 13:05:20.000000000 +0200 +++ linux-4.17-rc7/drivers/gpu/drm/udl/udl_fb.c 2018-06-03 13:08:03.000000000 +0200 @@ -34,6 +34,7 @@ module_param(fb_defio, int, S_IWUSR | S_ struct udl_fbdev { struct drm_fb_helper helper; struct udl_framebuffer ufb; + struct fb_ops fb_ops; int fb_count; }; @@ -405,7 +406,8 @@ static int udlfb_create(struct drm_fb_he info->fix.smem_len = size; info->fix.smem_start = (unsigned long)ufbdev->ufb.obj->vmapping; - info->fbops = &udlfb_ops; + ufbdev->fb_ops = udlfb_ops; + info->fbops = &ufbdev->fb_ops; drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth); drm_fb_helper_fill_var(info, &ufbdev->helper, sizes->fb_width, sizes->fb_height);