From: Andy Whitcroft <apw@canonical.com>
To: Jeff Garzik <jgarzik@pobox.com>, linux-ide@vger.kernel.org
Cc: Andy Whitcroft <apw@canonical.com>,
linux-kernel@vger.kernel.org,
"K. Y. Srinivasan" <kys@microsoft.com>,
Mike Sterling <Mike.Sterling@microsoft.com>,
Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: [PATCH 1/2] libata: add a host flag to ignore detected ATA devices
Date: Mon, 16 Apr 2012 12:20:28 +0100 [thread overview]
Message-ID: <1334575229-7493-2-git-send-email-apw@canonical.com> (raw)
In-Reply-To: <1334575229-7493-1-git-send-email-apw@canonical.com>
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 <apw@canonical.com>
---
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
next prev parent reply other threads:[~2012-04-16 11:20 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-29 17:28 [PATCH 1/1] ata_piix: defer disks to the Hyper-V paravirtualised drivers by default Andy Whitcroft
2012-03-30 9:14 ` Victor Miasnikov
2012-03-30 9:14 ` Victor Miasnikov
2012-04-10 16:08 ` KY Srinivasan
2012-04-12 15:55 ` Andy Whitcroft
2012-04-12 20:03 ` Jeff Garzik
2012-04-13 7:37 ` Andy Whitcroft
2012-04-14 15:53 ` [PATCH 0/2] Hyper-V disk support Andy Whitcroft
2012-04-14 15:53 ` [PATCH 1/2] libata: add a host flag to ignore detected ATA devices Andy Whitcroft
2012-04-14 15:53 ` [PATCH 2/2] ata_piix: defer disks to the Hyper-V drivers by default Andy Whitcroft
2012-04-14 16:02 ` Alan Cox
2012-04-15 0:10 ` KY Srinivasan
2012-04-16 11:20 ` [PATCH 0/2] Hyper-V disk support V3 Andy Whitcroft
2012-04-16 11:20 ` Andy Whitcroft [this message]
2012-04-16 11:20 ` [PATCH 2/2] UBUNTU: SAUCE: ata_piix: defer disks to the Hyper-V drivers by default Andy Whitcroft
2012-04-16 11:28 ` Sergei Shtylyov
2012-04-16 11:26 ` [PATCH 0/2] Hyper-V disk support V3 Alan Cox
2012-04-16 18:29 ` Andy Whitcroft
2012-04-16 18:41 ` KY Srinivasan
2012-04-18 20:12 ` Alan Cox
2012-04-18 20:21 ` KY Srinivasan
2012-04-19 8:15 ` 1) boot flag to disable the Hyper-V IDE drivers: ata_piix.prefer_ms_hyperv=0 2) PIIX_IGNORE_ATA_ON_HYPERV Re: [PATCH 0/2] Hyper-V disk support V3 RE: use hv_storvsc instead of ata_piix to handle the IDE disks devices ( but not for the CD-ROM) Victor Miasnikov
2012-04-19 8:15 ` Victor Miasnikov
2012-04-19 7:40 ` [PATCH 0/2] Hyper-V disk support V3 Andy Whitcroft
2012-04-19 13:17 ` KY Srinivasan
2012-04-19 14:33 ` [PATCH 0/2] Hyper-V disk support V4 Andy Whitcroft
2012-04-19 14:33 ` [PATCH 1/2] libata: add a host flag to ignore detected ATA devices Andy Whitcroft
2012-04-19 14:33 ` [PATCH 2/2] ata_piix: defer disks to the Hyper-V drivers by default Andy Whitcroft
2012-04-19 15:54 ` Sergei Shtylyov
2012-05-04 21:15 ` [PATCH 0/2] Hyper-V disk support V5 Andy Whitcroft
2012-05-04 21:15 ` [PATCH 1/2] libata: add a host flag to ignore detected ATA devices Andy Whitcroft
2012-05-07 19:43 ` Jeff Garzik
2012-05-04 21:15 ` [PATCH 2/2] ata_piix: defer disks to the Hyper-V drivers by default Andy Whitcroft
2012-04-16 15:32 ` [PATCH 0/2] Hyper-V disk support V3 Jeff Garzik
2012-04-16 18:28 ` Andy Whitcroft
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