From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:53620 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725870AbfGXFou (ORCPT ); Wed, 24 Jul 2019 01:44:50 -0400 Received: from pps.filterd (m0098420.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x6O5gO89183550 for ; Wed, 24 Jul 2019 01:44:49 -0400 Received: from e06smtp02.uk.ibm.com (e06smtp02.uk.ibm.com [195.75.94.98]) by mx0b-001b2d01.pphosted.com with ESMTP id 2txhcqr70g-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 24 Jul 2019 01:44:49 -0400 Received: from localhost by e06smtp02.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 24 Jul 2019 06:44:47 +0100 Date: Wed, 24 Jul 2019 07:44:40 +0200 From: Heiko Carstens Subject: Re: [PATCH v2 1/1] s390/dma: provide proper ARCH_ZONE_DMA_BITS value References: <20190723225155.3915-1-pasic@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190723225155.3915-1-pasic@linux.ibm.com> Message-Id: <20190724054440.GA4412@osiris> Sender: linux-s390-owner@vger.kernel.org List-ID: To: Halil Pasic Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org, Christoph Hellwig , Vasily Gorbik , Petr Tesarik , Christian Borntraeger , Janosch Frank On Wed, Jul 24, 2019 at 12:51:55AM +0200, Halil Pasic wrote: > 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") > --- > arch/s390/include/asm/page.h | 2 ++ > 1 file changed, 2 insertions(+) Applied, thanks!