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 X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1AD36C32753 for ; Wed, 14 Aug 2019 17:12:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D62952084D for ; Wed, 14 Aug 2019 17:12:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1565802736; bh=WxNqavY8+WLPdEEfFVrqo9hF2HEFECHIJ4G1X/i8P+0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ugE3hOGqcN9ZwUsnNBZQaZMr1wrqfHzlwXYAYLGAaWZA6C1M/R5ZvxOjsEjZ1RK6w yVNhEbH2/njjw7T86WdHysH+sB/6JVZXvsxUokpRlAgYhOmAE+UbT752BlDZsa8/M3 g85rT4tporm0bB2jWGO/88VUV5IRBAPrs4odSSxI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728793AbfHNRMO (ORCPT ); Wed, 14 Aug 2019 13:12:14 -0400 Received: from mail.kernel.org ([198.145.29.99]:35896 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730527AbfHNRML (ORCPT ); Wed, 14 Aug 2019 13:12:11 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 72A1B216F4; Wed, 14 Aug 2019 17:12:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1565802730; bh=WxNqavY8+WLPdEEfFVrqo9hF2HEFECHIJ4G1X/i8P+0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YtvWxvHeMZWisQadXfyJSl4bTi79TjCXz+/Bw+5I7+E3kMQ0lmeCe9F+FsVl4m4I2 Tv+yU5TCWhfk+EdkMGoimDOIMpGw80cxvl8D8Swejr2wd1BmoiuJ1LcpskVTG7SOvk ch+Cnv9+x7782vAi6CFW6zxYuqNIaUKdHe3F+GgA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Halil Pasic , Petr Tesarik , Heiko Carstens , Sasha Levin Subject: [PATCH 4.19 69/91] s390/dma: provide proper ARCH_ZONE_DMA_BITS value Date: Wed, 14 Aug 2019 19:01:32 +0200 Message-Id: <20190814165752.562527266@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190814165748.991235624@linuxfoundation.org> References: <20190814165748.991235624@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [ Upstream commit 1a2dcff881059dedc14fafc8a442664c8dbd60f1 ] On s390 ZONE_DMA is up to 2G, i.e. ARCH_ZONE_DMA_BITS should be 31 bits. The current value is 24 and makes __dma_direct_alloc_pages() take a wrong turn first (but __dma_direct_alloc_pages() recovers then). Let's correct ARCH_ZONE_DMA_BITS value and avoid wrong turns. Signed-off-by: Halil Pasic Reported-by: Petr Tesarik Fixes: c61e9637340e ("dma-direct: add support for allocation from ZONE_DMA and ZONE_DMA32") Signed-off-by: Heiko Carstens Signed-off-by: Sasha Levin --- arch/s390/include/asm/page.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h index 41e3908b397f8..0d753291c43c0 100644 --- a/arch/s390/include/asm/page.h +++ b/arch/s390/include/asm/page.h @@ -176,6 +176,8 @@ static inline int devmem_is_allowed(unsigned long pfn) #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \ VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) +#define ARCH_ZONE_DMA_BITS 31 + #include #include -- 2.20.1