From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andy Whitcroft Subject: [PATCH 1/2] libata: add a host flag to ignore detected ATA devices Date: Mon, 16 Apr 2012 12:20:28 +0100 Message-ID: <1334575229-7493-2-git-send-email-apw@canonical.com> References: <20120414170223.24f6ea31@pyramind.ukuu.org.uk> <1334575229-7493-1-git-send-email-apw@canonical.com> Return-path: Received: from youngberry.canonical.com ([91.189.89.112]:38041 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752994Ab2DPLUe (ORCPT ); Mon, 16 Apr 2012 07:20:34 -0400 In-Reply-To: <1334575229-7493-1-git-send-email-apw@canonical.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Jeff Garzik , linux-ide@vger.kernel.org Cc: Andy Whitcroft , linux-kernel@vger.kernel.org, "K. Y. Srinivasan" , Mike Sterling , Alan Cox Where devices are visible via more than one host we sometimes wish to indicate that cirtain devices should be ignored on a specific host. Add a host flag indicating that this host wishes to ignore ATA specific devices. Signed-off-by: Andy Whitcroft --- drivers/ata/libata-core.c | 6 ++++++ include/linux/libata.h | 1 + 2 files changed, 7 insertions(+) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index e0bda9f..18e87bf 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -1973,6 +1973,12 @@ retry: if (class == ATA_DEV_ATA) { if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) goto err_out; + if (ap->host->flags & ATA_HOST_IGNORE_ATA && + ata_id_is_ata(id)) { + ata_dev_dbg(dev, + "host indicates ignore ATA devices, ignored\n"); + return -ENOENT; + } } else { if (ata_id_is_ata(id)) goto err_out; diff --git a/include/linux/libata.h b/include/linux/libata.h index 42378d6..198c8f1 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -247,6 +247,7 @@ enum { ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ ATA_HOST_STARTED = (1 << 1), /* Host started */ ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */ + ATA_HOST_IGNORE_ATA = (1 << 3), /* Ignore ATA devices on this host. */ /* bits 24:31 of host->flags are reserved for LLD specific flags */ -- 1.7.9.5