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| author | Henrique de Moraes Holschuh <hmh@hmh.eng.br> | 2007-07-27 17:04:40 -0300 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2007-08-03 15:32:58 -0400 |
| commit | ac36393de6034be7266264a435360e7628849005 (patch) | |
| tree | e530b57c254536aac1c71602552bbde0e71cffe3 /drivers/misc/thinkpad_acpi.c | |
| parent | 7a883eaf62f4b943ebec738ce3b0796c67ef5d32 (diff) | |
| download | kernel_samsung_aries-ac36393de6034be7266264a435360e7628849005.zip kernel_samsung_aries-ac36393de6034be7266264a435360e7628849005.tar.gz kernel_samsung_aries-ac36393de6034be7266264a435360e7628849005.tar.bz2 | |
ACPI: thinkpad-acpi: fix the module init failure path
Thomas Renninger reports that if one tries to load thinkpad-acpi in a
non-thinkpad, one gets:
Call Trace:
[<ffffffff802fa57d>] kref_get+0x2f/0x36
[<ffffffff802f97f7>] kobject_get+0x12/0x17
[<ffffffff8036dfd7>] get_driver+0x14/0x1a
[<ffffffff8036dfee>] driver_remove_file+0x11/0x32
[<ffffffff8823b9be>] :thinkpad_acpi:thinkpad_acpi_module_exit+0xa8/0xfc
[<ffffffff8824b8a0>] :thinkpad_acpi:thinkpad_acpi_module_init+0x74a/0x776
[<ffffffff8024f968>] __link_module+0x0/0x25
[<ffffffff80252269>] sys_init_module+0x162c/0x178f
[<ffffffff8020bc2e>] system_call+0x7e/0x83
So, track if the platform driver and its driver attributes were registered,
and only deallocate them in that case.
This patch is based on Thomas Renninger's patch for the issue.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Acked-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/misc/thinkpad_acpi.c')
| -rw-r--r-- | drivers/misc/thinkpad_acpi.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c index fa80f35..f6cd34a 100644 --- a/drivers/misc/thinkpad_acpi.c +++ b/drivers/misc/thinkpad_acpi.c @@ -4668,12 +4668,15 @@ static int __init thinkpad_acpi_module_init(void) thinkpad_acpi_module_exit(); return ret; } + tp_features.platform_drv_registered = 1; + ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); if (ret) { printk(IBM_ERR "unable to create sysfs driver attributes\n"); thinkpad_acpi_module_exit(); return ret; } + tp_features.platform_drv_attrs_registered = 1; /* Device initialization */ @@ -4756,8 +4759,11 @@ static void thinkpad_acpi_module_exit(void) if (tpacpi_pdev) platform_device_unregister(tpacpi_pdev); - tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); - platform_driver_unregister(&tpacpi_pdriver); + if (tp_features.platform_drv_attrs_registered) + tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); + + if (tp_features.platform_drv_registered) + platform_driver_unregister(&tpacpi_pdriver); if (proc_dir) remove_proc_entry(IBM_PROC_DIR, acpi_root_dir); |