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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 598A4C4332F for ; Mon, 6 Nov 2023 13:11:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232055AbjKFNLS (ORCPT ); Mon, 6 Nov 2023 08:11:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56598 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232077AbjKFNLO (ORCPT ); Mon, 6 Nov 2023 08:11:14 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ADE65112; Mon, 6 Nov 2023 05:11:10 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EB238C433C7; Mon, 6 Nov 2023 13:11:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1699276270; bh=leY8eLaFM/5INJzbeFxEGUT4tiMRF+8GfXU/heY0qng=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Kr3CFCiSVk9PNyAVpwXexQEw5PQthUjSVGCsE92QpNnfzT9E/aOZGU/0lmxHr/rV7 zfZhX16pwZ2M2q8+xuDCWsa1gLdCuXEiO3AGUbWuOQUoqd1AW5wTG2HrLpq9+m6vSP fs9u5jyrP18Lodrdtj/b8NB8ix+nRChIcLrq7xlM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Arnd Bergmann , Baoquan He , Luis Chamberlain , Helge Deller , Thomas Zimmermann , Christophe Leroy , linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, Sasha Levin Subject: [PATCH 4.19 47/61] fbdev: atyfb: only use ioremap_uc() on i386 and ia64 Date: Mon, 6 Nov 2023 14:03:43 +0100 Message-ID: <20231106130301.221719418@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231106130259.573843228@linuxfoundation.org> References: <20231106130259.573843228@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Arnd Bergmann [ Upstream commit c1a8d1d0edb71dec15c9649cb56866c71c1ecd9e ] ioremap_uc() is only meaningful on old x86-32 systems with the PAT extension, and on ia64 with its slightly unconventional ioremap() behavior, everywhere else this is the same as ioremap() anyway. Change the only driver that still references ioremap_uc() to only do so on x86-32/ia64 in order to allow removing that interface at some point in the future for the other architectures. On some architectures, ioremap_uc() just returns NULL, changing the driver to call ioremap() means that they now have a chance of working correctly. Signed-off-by: Arnd Bergmann Signed-off-by: Baoquan He Reviewed-by: Luis Chamberlain Cc: Helge Deller Cc: Thomas Zimmermann Cc: Christophe Leroy Cc: linux-fbdev@vger.kernel.org Cc: dri-devel@lists.freedesktop.org Signed-off-by: Helge Deller Signed-off-by: Sasha Levin --- drivers/video/fbdev/aty/atyfb_base.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/video/fbdev/aty/atyfb_base.c b/drivers/video/fbdev/aty/atyfb_base.c index 05111e90f1681..5ef008e9c61c3 100644 --- a/drivers/video/fbdev/aty/atyfb_base.c +++ b/drivers/video/fbdev/aty/atyfb_base.c @@ -3435,11 +3435,15 @@ static int atyfb_setup_generic(struct pci_dev *pdev, struct fb_info *info, } info->fix.mmio_start = raddr; +#if defined(__i386__) || defined(__ia64__) /* * By using strong UC we force the MTRR to never have an * effect on the MMIO region on both non-PAT and PAT systems. */ par->ati_regbase = ioremap_uc(info->fix.mmio_start, 0x1000); +#else + par->ati_regbase = ioremap(info->fix.mmio_start, 0x1000); +#endif if (par->ati_regbase == NULL) return -ENOMEM; -- 2.42.0