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=-8.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 E60CEC31E58 for ; Mon, 17 Jun 2019 12:20:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BD18E2084D for ; Mon, 17 Jun 2019 12:20:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="d1sjX51U" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727031AbfFQMUN (ORCPT ); Mon, 17 Jun 2019 08:20:13 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:59162 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725983AbfFQMUL (ORCPT ); Mon, 17 Jun 2019 08:20:11 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From :Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=jgA9Ci7AQa++GrkvJehEoqYi+g4K+1QHauLNZ9HwxTY=; b=d1sjX51UWpl8FUDvcTCorx2qXv cNA/TAMdL2HqGcHXLOgVtw5yS6Pgy9w6awlEOufCOgzYn9Yo+ODjCMwlkJ1BPUj2lpr22amhwPtVF kJb2G5qXC88RE8K9dfSK1ZwZNlqeTZKkp2cLL/DBIVxzhYRF0huY4/ii/urMM+fMCoh6Et80Xvtz3 jwsVBbDXC1uKlbCL7KrYKlq16Fi/QgkwRAckzXosxghywWmVluEkNo3R1x6p32jW4QwDMY8Qv8S5q djo4CV6QR14ST3ZadnWklAVTod9qu2QRvGdix3QQm7gbdFWK3jVfkzckLD4557BDXCV8rR6/q7Ggj 9j18861Q==; Received: from clnet-p19-102.ikbnet.co.at ([83.175.77.102] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92 #3 (Red Hat Linux)) id 1hcqcK-0004So-SC; Mon, 17 Jun 2019 12:20:09 +0000 From: Christoph Hellwig To: "Martin K . Petersen" Cc: Sagi Grimberg , Max Gurtovoy , Bart Van Assche , linux-rdma@vger.kernel.org, linux-scsi@vger.kernel.org, megaraidlinux.pdl@broadcom.com, MPT-FusionLinux.pdl@broadcom.com, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/8] scsi: take the DMA max mapping size into account Date: Mon, 17 Jun 2019 14:19:54 +0200 Message-Id: <20190617122000.22181-3-hch@lst.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190617122000.22181-1-hch@lst.de> References: <20190617122000.22181-1-hch@lst.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We need to limit the devices max_sectors to what the DMA mapping implementation can support. If not we risk running out of swiotlb buffers easily. Signed-off-by: Christoph Hellwig --- drivers/scsi/scsi_lib.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index d333bb6b1c59..f233bfd84cd7 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -1768,6 +1768,8 @@ void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q) blk_queue_max_integrity_segments(q, shost->sg_prot_tablesize); } + shost->max_sectors = min_t(unsigned int, shost->max_sectors, + dma_max_mapping_size(dev) << SECTOR_SHIFT); blk_queue_max_hw_sectors(q, shost->max_sectors); if (shost->unchecked_isa_dma) blk_queue_bounce_limit(q, BLK_BOUNCE_ISA); -- 2.20.1