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authorHenrique de Moraes Holschuh <hmh@hmh.eng.br>2007-03-15 16:15:06 -0300
committerLen Brown <len.brown@intel.com>2007-03-16 01:07:18 -0400
commit96e89afe6da630dc54cfbca33c2c6a7ab9b6c11b (patch)
tree277fdbe85c0131a29a30394e6cd06c7e0764db9f /drivers/acpi
parent5b18167d6b7c63e2787cd9a68f0620a9c363fc85 (diff)
downloadop-kernel-dev-96e89afe6da630dc54cfbca33c2c6a7ab9b6c11b.zip
op-kernel-dev-96e89afe6da630dc54cfbca33c2c6a7ab9b6c11b.tar.gz
ACPI: ibm-acpi: allow module to load when acpi notifiers can't be set (v2)
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 <hmh@hmh.eng.br> Cc: Chris Wedgwood <cw@f00f.org> Cc: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/ibm_acpi.c19
1 files changed, 16 insertions, 3 deletions
diff --git a/drivers/acpi/ibm_acpi.c b/drivers/acpi/ibm_acpi.c
index 3690136..dc10966 100644
--- a/drivers/acpi/ibm_acpi.c
+++ b/drivers/acpi/ibm_acpi.c
@@ -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;
}
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