From patchwork Wed Dec 6 13:50:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 13481807 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.223.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4A9AFD44 for ; Wed, 6 Dec 2023 05:51:58 -0800 (PST) Received: from imap2.dmz-prg2.suse.org (imap2.dmz-prg2.suse.org [IPv6:2a07:de40:b281:104:10:150:64:98]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id AB9871FD0E; Wed, 6 Dec 2023 13:51:56 +0000 (UTC) Received: from imap2.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap2.dmz-prg2.suse.org (Postfix) with ESMTPS id 752C1133DD; Wed, 6 Dec 2023 13:51:56 +0000 (UTC) Received: from dovecot-director2.suse.de ([10.150.64.162]) by imap2.dmz-prg2.suse.org with ESMTPSA id yCFGG3x8cGWVBgAAn2gu4w (envelope-from ); Wed, 06 Dec 2023 13:51:56 +0000 From: Thomas Zimmermann To: javierm@redhat.com, deller@gmx.de, pjones@redhat.com, sui.jingfeng@linux.dev Cc: linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, Thomas Zimmermann Subject: [PATCH v3 2/4] fbdev/efifb: Use screen_info pointer from device Date: Wed, 6 Dec 2023 14:50:27 +0100 Message-ID: <20231206135153.2599-3-tzimmermann@suse.de> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231206135153.2599-1-tzimmermann@suse.de> References: <20231206135153.2599-1-tzimmermann@suse.de> Precedence: bulk X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Level: Authentication-Results: smtp-out2.suse.de; none X-Rspamd-Server: rspamd2 X-Spamd-Result: default: False [-4.00 / 50.00]; REPLY(-4.00)[] X-Spam-Score: -4.00 X-Rspamd-Queue-Id: AB9871FD0E Use the screen_info instance from the device instead of dereferencing the global screen_info state. Decouples the driver from per-architecture code. Duplicated the screen_info data, so that efifb can modify it at will. v2: * comment on devm_kmemdup() usage (Javier) Signed-off-by: Thomas Zimmermann Tested-by: Sui Jingfeng Reviewed-by: Javier Martinez Canillas --- drivers/video/fbdev/efifb.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/drivers/video/fbdev/efifb.c b/drivers/video/fbdev/efifb.c index 6b3b5cca1d41..10fc14ad5d12 100644 --- a/drivers/video/fbdev/efifb.c +++ b/drivers/video/fbdev/efifb.c @@ -359,7 +359,7 @@ static u64 bar_offset; static int efifb_probe(struct platform_device *dev) { - struct screen_info *si = &screen_info; + struct screen_info *si; struct fb_info *info; struct efifb_par *par; int err, orientation; @@ -369,6 +369,18 @@ static int efifb_probe(struct platform_device *dev) char *option = NULL; efi_memory_desc_t md; + /* + * If we fail probing the device, the kernel might try a different + * driver. We get a copy of the attached screen_info, so that we can + * modify its values without affecting later drivers. + */ + si = dev_get_platdata(&dev->dev); + if (!si) + return -ENODEV; + si = devm_kmemdup(&dev->dev, si, sizeof(*si), GFP_KERNEL); + if (!si) + return -ENOMEM; + if (si->orig_video_isVGA != VIDEO_TYPE_EFI || pci_dev_disabled) return -ENODEV;