diff options
| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-06-08 02:55:07 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-06-13 10:49:38 -0700 |
| commit | 3e9ef737770227e1f7c01851d239a3db10263bbb (patch) | |
| tree | f21c99fde8ae04dc65957b18fc4459535df8c7f5 | |
| parent | c7ac79de28de4a4c6a2e903ff097c4bfed98e816 (diff) | |
Revert "ACPI / scan: do not match drivers against objects having scan handlers"
commit ea7f665612fcc73da6b7698f468cd5fc03a30d47 upstream.
Commit 9f29ab11ddbf ("ACPI / scan: do not match drivers against objects
having scan handlers") introduced a boot regression on Tony's ia64 HP
rx2600. Tony says:
"It panics with the message:
Kernel panic - not syncing: Unable to find SBA IOMMU: Try a generic or DIG kernel
[...] my problem comes from arch/ia64/hp/common/sba_iommu.c
where the code in sba_init() says:
acpi_bus_register_driver(&acpi_sba_ioc_driver);
if (!ioc_list) {
but because of this change we never managed to call ioc_init()
so ioc_list doesn't get set up, and we die."
Revert it to avoid this breakage and we'll fix the problem it attempted
to address later.
Reported-by: Tony Luck <tony.luck@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/acpi/scan.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 2855aaee898..5e7e991717d 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -553,10 +553,6 @@ static int acpi_bus_match(struct device *dev, struct device_driver *drv) struct acpi_device *acpi_dev = to_acpi_device(dev); struct acpi_driver *acpi_drv = to_acpi_driver(drv); - /* Skip ACPI device objects with scan handlers attached. */ - if (acpi_dev->handler) - return 0; - return acpi_dev->flags.match_driver && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); } |