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| author | Henrique de Moraes Holschuh <hmh@hmh.eng.br> | 2007-03-15 16:15:06 -0300 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2007-03-16 01:07:18 -0400 |
| commit | 96e89afe6da630dc54cfbca33c2c6a7ab9b6c11b (patch) | |
| tree | 277fdbe85c0131a29a30394e6cd06c7e0764db9f /drivers | |
| parent | 5b18167d6b7c63e2787cd9a68f0620a9c363fc85 (diff) | |
| download | kernel_samsung_smdk4412-96e89afe6da630dc54cfbca33c2c6a7ab9b6c11b.zip kernel_samsung_smdk4412-96e89afe6da630dc54cfbca33c2c6a7ab9b6c11b.tar.gz kernel_samsung_smdk4412-96e89afe6da630dc54cfbca33c2c6a7ab9b6c11b.tar.bz2 | |
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')
| -rw-r--r-- | drivers/acpi/ibm_acpi.c | 19 |
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; } |