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ACPI: ibm-acpi: allow module to load when acpi notifiers can't be set (v2)

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This patch allows for ibm-acpi to coexist (with diminished functionality) with
other drivers like ACPI_BAY.  ibm-acpi will simply disable the functions it is
not able to register ACPI notifiers for.

Signed-off-by: Henrique de Moraes Holschuh <[email protected]>
Cc: Chris Wedgwood <[email protected]>
Cc: Kristen Carlson Accardi <[email protected]>
Signed-off-by: Len Brown <[email protected]>
This commit is contained in:
Henrique de Moraes Holschuh 2007-03-15 16:15:06 -03:00 • committed by Len Brown
commit 96e89afe6d
1 changed files with 16 additions and 3 deletions
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19
drivers/acpi/ibm_acpi.c
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@ -2507,7 +2507,7 @@ static int __init setup_notify(struct ibm_struct *ibm)
ret = acpi_bus_get_device(*ibm->handle, &ibm->device);
if (ret < 0) {
printk(IBM_ERR "%s device not present\n", ibm->name);
return 0;
return -ENODEV;
}
acpi_driver_data(ibm->device) = ibm;
@ -2516,8 +2516,13 @@ static int __init setup_notify(struct ibm_struct *ibm)
status = acpi_install_notify_handler(*ibm->handle, ibm->type,
dispatch_notify, ibm);
if (ACPI_FAILURE(status)) {
printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
ibm->name, status);
if (status == AE_ALREADY_EXISTS) {
printk(IBM_NOTICE "another device driver is already handling %s events\n",
ibm->name);
} else {
printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
ibm->name, status);
}
return -ENODEV;
}
ibm->notify_installed = 1;
@ -2553,6 +2558,8 @@ static int __init register_driver(struct ibm_struct *ibm)
return ret;
}
static void ibm_exit(struct ibm_struct *ibm);
static int __init ibm_init(struct ibm_struct *ibm)
{
int ret;
@ -2594,6 +2601,12 @@ static int __init ibm_init(struct ibm_struct *ibm)
if (ibm->notify) {
ret = setup_notify(ibm);
if (ret == -ENODEV) {
printk(IBM_NOTICE "disabling subdriver %s\n",
ibm->name);
ibm_exit(ibm);
return 0;
}
if (ret < 0)
return ret;
}