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bay: exit if notify handler cannot be installed 

If acpi_install_notify_handler() for a bay device fails, the bay driver is
superfluous.  Most likely, another driver (like libata) is already caring
about this device anyway.  Furthermore,
register_hotplug_dock_device(acpi_handle) from the dock driver must not be
called twice with the same handler.  This would result in an endless loop
consuming 100% of CPU.  So clean up and exit.

Signed-off-by: Holger Macht <hmacht@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Holger Macht 2008-06-09 16:22:24 -07:00 committed by Len Brown
parent 1fdd686086
commit 7efd52a407
1 changed files with 10 additions and 6 deletions
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16
drivers/acpi/bay.c
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@ -301,16 +301,20 @@ static int bay_add(acpi_handle handle, int id)
*/
pdev->dev.uevent_suppress = 0;
if (acpi_bay_add_fs(new_bay)) {
platform_device_unregister(new_bay->pdev);
goto bay_add_err;
}
/* register for events on this device */
status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
bay_notify, new_bay);
if (ACPI_FAILURE(status)) {
printk(KERN_ERR PREFIX "Error installing bay notify handler\n");
printk(KERN_INFO PREFIX "Error installing bay notify handler\n");
platform_device_unregister(new_bay->pdev);
goto bay_add_err;
}
if (acpi_bay_add_fs(new_bay)) {
acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
bay_notify);
platform_device_unregister(new_bay->pdev);
goto bay_add_err;
}
/* if we are on a dock station, we should register for dock