From mboxrd@z Thu Jan 1 00:00:00 1970 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 81B57C433FE for ; Thu, 3 Nov 2022 10:16:35 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E154C10E5CC; Thu, 3 Nov 2022 10:16:33 +0000 (UTC) Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by gabe.freedesktop.org (Postfix) with ESMTPS id D7BC710E5CD for ; Thu, 3 Nov 2022 10:16:30 +0000 (UTC) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 860671F88C; Thu, 3 Nov 2022 10:16:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1667470589; h=from:from:reply-to: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=GZeWEvfT5ufNWUhDXgyws4WD5avNeaW22SMGVa6WUDA=; b=WII3qmYMGsl22ZnFBHYLvr9lC+UE00kw4VfnKAm1Bb67nO4b/0KDYwewNv5LQw4cKmlprZ rIeNs8q3M112lsq+LMYd53/UMCN7hY4k0XQ50NL29FfeKZnW1yLP7ROs1SSarjXNSq7LKn xBRY+DuuoEIsdhrq4slYYnE0APDwVww= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1667470589; h=from:from:reply-to: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=GZeWEvfT5ufNWUhDXgyws4WD5avNeaW22SMGVa6WUDA=; b=uVyYgoBBg4fPHj9nQl4fH81AwPWa0qBh85Dc5bIGODTQY4nE9knnmjzGcwGJmDaNWo6Mg2 4Nb+odsppsKLcNCg== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 5354713ADB; Thu, 3 Nov 2022 10:16:29 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id MDZUE/2UY2PTcgAAMHmgww (envelope-from ); Thu, 03 Nov 2022 10:16:29 +0000 From: Thomas Zimmermann To: alexander.stein@ew.tq-group.com, javierm@redhat.com, airlied@gmail.com, daniel@ffwll.ch Subject: [PATCH v3 1/2] drm/ofdrm: Convert PCI IDs to CPU endianness for comparing Date: Thu, 3 Nov 2022 11:16:26 +0100 Message-Id: <20221103101627.32502-2-tzimmermann@suse.de> X-Mailer: git-send-email 2.38.0 In-Reply-To: <20221103101627.32502-1-tzimmermann@suse.de> References: <20221103101627.32502-1-tzimmermann@suse.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Zimmermann , dri-devel@lists.freedesktop.org, kernel test robot Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Properties of 32-bit integers are returned from the OF device tree as type __be32. Convert PCI vendor and device IDs from __be32 to host endianness before comparing them to constants. All relevant machines are old, big-endian Macintosh systems; hence the bug never happened in practice. Fixes sparse warnings shown below. drivers/gpu/drm/tiny/ofdrm.c:237:17: warning: restricted __be32 degrades to integer drivers/gpu/drm/tiny/ofdrm.c:238:18: warning: restricted __be32 degrades to integer drivers/gpu/drm/tiny/ofdrm.c:238:54: warning: restricted __be32 degrades to integer See [1] for the bug report. v2: * convert endianness (Alex) Reported-by: kernel test robot Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas Link: https://lore.kernel.org/dri-devel/202210192208.D888I6X7-lkp@intel.com/ # [1] --- drivers/gpu/drm/tiny/ofdrm.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/tiny/ofdrm.c b/drivers/gpu/drm/tiny/ofdrm.c index 0e1cc2369afcc..44f13a2b372be 100644 --- a/drivers/gpu/drm/tiny/ofdrm.c +++ b/drivers/gpu/drm/tiny/ofdrm.c @@ -231,7 +231,7 @@ static u64 display_get_address_of(struct drm_device *dev, struct device_node *of return address; } -static bool is_avivo(__be32 vendor, __be32 device) +static bool is_avivo(u32 vendor, u32 device) { /* This will match most R5xx */ return (vendor == PCI_VENDOR_ID_ATI) && @@ -265,8 +265,13 @@ static enum ofdrm_model display_get_model_of(struct drm_device *dev, struct devi of_parent = of_get_parent(of_node); vendor_p = of_get_property(of_parent, "vendor-id", NULL); device_p = of_get_property(of_parent, "device-id", NULL); - if (vendor_p && device_p && is_avivo(*vendor_p, *device_p)) - model = OFDRM_MODEL_AVIVO; + if (vendor_p && device_p) { + u32 vendor = be32_to_cpup(vendor_p); + u32 device = be32_to_cpup(device_p); + + if (is_avivo(vendor, device)) + model = OFDRM_MODEL_AVIVO; + } of_node_put(of_parent); } else if (of_device_is_compatible(of_node, "qemu,std-vga")) { model = OFDRM_MODEL_QEMU; -- 2.38.0