libata: restore acpi disable functionality
authorAaron Lu <aaron.lu@intel.com>
Mon, 26 Nov 2012 05:55:25 +0000 (13:55 +0800)
committerJeff Garzik <jgarzik@redhat.com>
Mon, 3 Dec 2012 09:57:15 +0000 (04:57 -0500)
commit0d0cdb028f9d9771e2b346038707734121f906e3
tree0bae4e559e963bdc1b487806848b5df7021a3283
parenta52f514c911978dee418f19d1d0103e3bc25fa62
libata: restore acpi disable functionality

Commit 66fa7f215 "libata-acpi: improve ACPI disabling" introdcued the
behaviour of disabling ATA ACPI if ata_acpi_on_devcfg failed the 2nd
time, but commit 30dcf76ac dropped this behaviour and this caused
problem for Dimitris Damigos, where his laptop can not resume correctly.

The bugzilla page for it is:
https://bugzilla.kernel.org/show_bug.cgi?id=49331

The problem is, ata_dev_push_id will fail the 2nd time it is invoked,
and due to disabling ACPI code is dropped, ata_acpi_on_devcfg which
calls ata_dev_push_id will keep failing and eventually made the device
disabled.

This patch restores the original behaviour, if acpi failed the 2nd time,
disable acpi functionality for the device(and we do not event need to
add a debug message for this as it is still there ;-).

Reported-by: Dimitris Damigos <damigos@freemail.gr>
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
drivers/ata/libata-acpi.c
include/linux/libata.h