From patchwork Mon Dec 4 09:27:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 751455 Received: from smtp-out2.suse.de (smtp-out2.suse.de [IPv6:2a07:de40:b251:101:10:150:64:2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7AD47100 for ; Mon, 4 Dec 2023 01:28:16 -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 215631FE62; Mon, 4 Dec 2023 09:28:15 +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 E3B1913B47; Mon, 4 Dec 2023 09:28:14 +0000 (UTC) Received: from dovecot-director2.suse.de ([10.150.64.162]) by imap2.dmz-prg2.suse.org with ESMTPSA id uP5JNq6bbWWwLgAAn2gu4w (envelope-from ); Mon, 04 Dec 2023 09:28:14 +0000 From: Thomas Zimmermann To: javierm@redhat.com, deller@gmx.de, pjones@redhat.com Cc: linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, Thomas Zimmermann Subject: [PATCH v2 4/4] fbdev/vesafb: Use screen_info pointer from device Date: Mon, 4 Dec 2023 10:27:22 +0100 Message-ID: <20231204092812.2612-5-tzimmermann@suse.de> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231204092812.2612-1-tzimmermann@suse.de> References: <20231204092812.2612-1-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: 215631FE62 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 vesafb can modify it at will. v2: * comment on devm_kmemdup() usage (Javier) Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas --- drivers/video/fbdev/vesafb.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/drivers/video/fbdev/vesafb.c b/drivers/video/fbdev/vesafb.c index ea89accbec385..8ab64ae4cad3e 100644 --- a/drivers/video/fbdev/vesafb.c +++ b/drivers/video/fbdev/vesafb.c @@ -243,7 +243,7 @@ static int vesafb_setup(char *options) static int vesafb_probe(struct platform_device *dev) { - struct screen_info *si = &screen_info; + struct screen_info *si; struct fb_info *info; struct vesafb_par *par; int i, err; @@ -252,6 +252,18 @@ static int vesafb_probe(struct platform_device *dev) unsigned int size_total; char *option = NULL; + /* + * 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; + /* ignore error return of fb_get_options */ fb_get_options("vesafb", &option); vesafb_setup(option);