From patchwork Wed Apr 6 21:39:19 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Javier Martinez Canillas X-Patchwork-Id: 558384 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3017AC433F5 for ; Wed, 6 Apr 2022 21:49:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236519AbiDFVvi (ORCPT ); Wed, 6 Apr 2022 17:51:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42498 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236388AbiDFVvM (ORCPT ); Wed, 6 Apr 2022 17:51:12 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id DD4FE5B3D7 for ; Wed, 6 Apr 2022 14:41:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1649281260; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=4FhXBUnLq/AeYpcQ43hIiOOWtFlBWzfoVNvi0Bsh0Mg=; b=PyUfjGCC1VQFwn7lvEXn9IaB8SfkWw63Oi/RdasUCAQ4WZbSlyNZuw5y7qn95Xp6+gD+UF 7FUEv95qfmg6ShaDW1Gr1skp8u+EBXfg/Q5ca4H0tHwq/azB1mDp2Fwg+sSbRwpx/RDIpM CJHFQro0+shaq22fQd0UTbiWesgNsBE= Received: from mail-wm1-f72.google.com (mail-wm1-f72.google.com [209.85.128.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-631-E5D0HNKOPqCL1y069tjALg-1; Wed, 06 Apr 2022 17:40:59 -0400 X-MC-Unique: E5D0HNKOPqCL1y069tjALg-1 Received: by mail-wm1-f72.google.com with SMTP id x8-20020a7bc768000000b0038e73173886so1901152wmk.6 for ; Wed, 06 Apr 2022 14:40:58 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=4FhXBUnLq/AeYpcQ43hIiOOWtFlBWzfoVNvi0Bsh0Mg=; b=KegbbIbdR5A9cHck95RZru7dddqNjh+AJnE6ZxaFWxeJLjy7B0G6jvDWVwwfzWsu7b KAYEW5SI9f3fuj2zQvkAEiiES8RpIuEOuWukW3UIjIkNrbNzNd63cvD1jVbWpGdjnzUW bYQHU5bG73EvOgeC6jb7AXky11vjDJVcLidfuf6ygPxX8jlZQbjc+HuPRcn9nxMhUqqz qdSYWYd5lO/gDP1KR4N95r5owk2WU4IJwFm/NwuyUfvd88TxpinBirtVBdUq5ISgWpmM RCqQF5Nov30X7eQ6Vln/a08Iwxeo7cuUF2m2IFSHiEW49NyY/sCaBAUPLM7nRcq1Ri2I k8QA== X-Gm-Message-State: AOAM5324vav9XJiYBms2D7GGtl7ZOnwgfu5AWnvkfMAn8WANmJLZRfSs JwqleaHV0p5j5k2dsjBi+8LwUdwSlsC93JXL5krBvMMVHdGuqGsYV6xTq6ej3qQqI+La1CYJW6H RNBMBvz2w/Ntp/xFqiQzV+zg= X-Received: by 2002:a7b:cf2f:0:b0:38e:6f21:bba9 with SMTP id m15-20020a7bcf2f000000b0038e6f21bba9mr9082584wmg.94.1649281257932; Wed, 06 Apr 2022 14:40:57 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzu0lYRk3QkxgnvH66v8eUTrMYR+LVlqeV9xMaH6jcY66CpHDS6DKp0bRanjMtEYrzwKOSL2A== X-Received: by 2002:a7b:cf2f:0:b0:38e:6f21:bba9 with SMTP id m15-20020a7bcf2f000000b0038e6f21bba9mr9082565wmg.94.1649281257668; Wed, 06 Apr 2022 14:40:57 -0700 (PDT) Received: from minerva.home ([92.176.231.205]) by smtp.gmail.com with ESMTPSA id o29-20020a05600c511d00b0038e3532b23csm5876020wms.15.2022.04.06.14.40.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 Apr 2022 14:40:57 -0700 (PDT) From: Javier Martinez Canillas To: linux-kernel@vger.kernel.org Cc: dri-devel@lists.freedesktop.org, Thomas Zimmermann , Daniel Vetter , Zack Rusin , Javier Martinez Canillas , Hans de Goede , Ilya Trukhanov , Daniel Vetter , Peter Jones , linux-fbdev@vger.kernel.org, Helge Deller Subject: [RESEND RFC PATCH 5/5] Revert "fbdev: Prevent probing generic drivers if a FB is already registered" Date: Wed, 6 Apr 2022 23:39:19 +0200 Message-Id: <20220406213919.600294-6-javierm@redhat.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220406213919.600294-1-javierm@redhat.com> References: <20220406213919.600294-1-javierm@redhat.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org From: Daniel Vetter This reverts commit fb561bf9abde49f7e00fdbf9ed2ccf2d86cac8ee. With commit 27599aacbaefcbf2af7b06b0029459bbf682000d Author: Thomas Zimmermann Date: Tue Jan 25 10:12:18 2022 +0100 fbdev: Hot-unplug firmware fb devices on forced removal this should be fixed properly and we can remove this somewhat hackish check here (e.g. this won't catch drm drivers if fbdev emulation isn't enabled). Cc: Thomas Zimmermann Cc: Zack Rusin Cc: Javier Martinez Canillas Cc: Zack Rusin Cc: Hans de Goede Cc: Ilya Trukhanov Signed-off-by: Daniel Vetter Cc: Peter Jones Cc: linux-fbdev@vger.kernel.org Signed-off-by: Javier Martinez Canillas --- drivers/video/fbdev/efifb.c | 11 ----------- drivers/video/fbdev/simplefb.c | 11 ----------- 2 files changed, 22 deletions(-) diff --git a/drivers/video/fbdev/efifb.c b/drivers/video/fbdev/efifb.c index ea42ba6445b2..edca3703b964 100644 --- a/drivers/video/fbdev/efifb.c +++ b/drivers/video/fbdev/efifb.c @@ -351,17 +351,6 @@ static int efifb_probe(struct platform_device *dev) char *option = NULL; efi_memory_desc_t md; - /* - * Generic drivers must not be registered if a framebuffer exists. - * If a native driver was probed, the display hardware was already - * taken and attempting to use the system framebuffer is dangerous. - */ - if (num_registered_fb > 0) { - dev_err(&dev->dev, - "efifb: a framebuffer is already registered\n"); - return -EINVAL; - } - if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI || pci_dev_disabled) return -ENODEV; diff --git a/drivers/video/fbdev/simplefb.c b/drivers/video/fbdev/simplefb.c index 94fc9c6d0411..0ef41173325a 100644 --- a/drivers/video/fbdev/simplefb.c +++ b/drivers/video/fbdev/simplefb.c @@ -413,17 +413,6 @@ static int simplefb_probe(struct platform_device *pdev) struct simplefb_par *par; struct resource *res, *mem; - /* - * Generic drivers must not be registered if a framebuffer exists. - * If a native driver was probed, the display hardware was already - * taken and attempting to use the system framebuffer is dangerous. - */ - if (num_registered_fb > 0) { - dev_err(&pdev->dev, - "simplefb: a framebuffer is already registered\n"); - return -EINVAL; - } - if (fb_get_options("simplefb", NULL)) return -ENODEV;