Commit 1dc58ce4 authored by Robin H. Johnson's avatar Robin H. Johnson Committed by Greg Kroah-Hartman

libata: disable a disk via libata.force params

commit b8bd6dc36186fe99afa7b73e9e2d9a98ad5c4865 upstream.

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: 's avatarRobin H. Johnson <robbat2@gentoo.org>
Signed-off-by: 's avatarTejun Heo <tj@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-driveSigned-off-by: 's avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 3d097b15
...@@ -1458,6 +1458,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted. ...@@ -1458,6 +1458,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
* atapi_dmadir: Enable ATAPI DMADIR bridge support * atapi_dmadir: Enable ATAPI DMADIR bridge support
* disable: Disable this device.
If there are multiple matching configurations changing If there are multiple matching configurations changing
the same attribute, the last one is used. the same attribute, the last one is used.
......
...@@ -6507,6 +6507,7 @@ static int __init ata_parse_force_one(char **cur, ...@@ -6507,6 +6507,7 @@ static int __init ata_parse_force_one(char **cur,
{ "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST }, { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
{ "rstonce", .lflags = ATA_LFLAG_RST_ONCE }, { "rstonce", .lflags = ATA_LFLAG_RST_ONCE },
{ "atapi_dmadir", .horkage_on = ATA_HORKAGE_ATAPI_DMADIR }, { "atapi_dmadir", .horkage_on = ATA_HORKAGE_ATAPI_DMADIR },
{ "disable", .horkage_on = ATA_HORKAGE_DISABLE },
}; };
char *start = *cur, *p = *cur; char *start = *cur, *p = *cur;
char *id, *val, *endp; char *id, *val, *endp;
......
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