From b8bd6dc36186fe99afa7b73e9e2d9a98ad5c4865 Mon Sep 17 00:00:00 2001
From: "Robin H. Johnson" <robbat2@gentoo.org>
Date: Mon, 16 Dec 2013 09:31:19 -0800
Subject: [PATCH] libata: disable a disk via libata.force params
A user on StackExchange had a failing SSD that's soldered directly
onto the motherboard of his system. The BIOS does not give any option
to disable it at all, so he can't just hide it from the OS via the
BIOS.
The old IDE layer had hdX=noprobe override for situations like this,
but that was never ported to the libata layer.
This patch implements a disable flag for libata.force.
Example use:
libata.force=2.0:disable
[v2 of the patch, removed the nodisable flag per Tejun Heo]
Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
Link: http://unix.stackexchange.com/questions/102648/how-to-tell-linux-kernel-3-0-to-completely-ignore-a-failing-disk
Link: http://askubuntu.com/questions/352836/how-can-i-tell-linux-kernel-to-completely-ignore-a-disk-as-if-it-was-not-even-co
Link: http://superuser.com/questions/599333/how-to-disable-kernel-probing-for-drive
---
Documentation/kernel-parameters.txt | 2 ++
drivers/ata/libata-core.c | 1 +
2 files changed, 3 insertions(+)
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 50680a59a2ff9..b9e9bd8542980 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1529,6 +1529,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
* atapi_dmadir: Enable ATAPI DMADIR bridge support
+ * disable: Disable this device.
+
If there are multiple matching configurations changing
the same attribute, the last one is used.
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index dae73efe5dbf7..ff0158481d53c 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -6522,6 +6522,7 @@ static int __init ata_parse_force_one(char **cur,
{ "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
{ "rstonce", .lflags = ATA_LFLAG_RST_ONCE },
{ "atapi_dmadir", .horkage_on = ATA_HORKAGE_ATAPI_DMADIR },
+ { "disable", .horkage_on = ATA_HORKAGE_DISABLE },
};
char *start = *cur, *p = *cur;
char *id, *val, *endp;
--
GitLab