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authorChuck Ebbert <cebbert@redhat.com>2007-05-09 15:05:48 -0700
committerLen Brown <len.brown@intel.com>2007-05-10 03:30:41 -0400
commit22fe4c2114e29477ca6738729c074ee8f60d3b73 (patch)
treeaf07c5267dd3d66b75bc4d3083eb2e946393f09f /drivers/acpi/dock.c
parent38ff4ffc039ba5a5878f2dcbb03d87c3a1f02f1b (diff)
ACPI: dock: fix opps after dock driver fails to initialize
The driver tests the dock_station pointer for nonnull to check whether it has initialized properly. But in some cases dock_station will be non-null after being freed when driver init fails. Fix by zeroing the pointer after freeing. Signed-off-by: Chuck Ebbert <cebbert@redhat.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/dock.c')
-rw-r--r--drivers/acpi/dock.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index 9ddc3f189bb7..f66f4f7767ac 100644
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -715,6 +715,7 @@ static int dock_add(acpi_handle handle)
if (ret) {
printk(KERN_ERR PREFIX "Error %d registering dock device\n", ret);
kfree(dock_station);
+ dock_station = NULL;
return ret;
}
ret = device_create_file(&dock_device.dev, &dev_attr_docked);
@@ -722,6 +723,7 @@ static int dock_add(acpi_handle handle)
printk("Error %d adding sysfs file\n", ret);
platform_device_unregister(&dock_device);
kfree(dock_station);
+ dock_station = NULL;
return ret;
}
ret = device_create_file(&dock_device.dev, &dev_attr_undock);
@@ -730,6 +732,7 @@ static int dock_add(acpi_handle handle)
device_remove_file(&dock_device.dev, &dev_attr_docked);
platform_device_unregister(&dock_device);
kfree(dock_station);
+ dock_station = NULL;
return ret;
}
ret = device_create_file(&dock_device.dev, &dev_attr_uid);
@@ -739,6 +742,7 @@ static int dock_add(acpi_handle handle)
device_remove_file(&dock_device.dev, &dev_attr_undock);
platform_device_unregister(&dock_device);
kfree(dock_station);
+ dock_station = NULL;
return ret;
}
@@ -751,6 +755,7 @@ static int dock_add(acpi_handle handle)
dd = alloc_dock_dependent_device(handle);
if (!dd) {
kfree(dock_station);
+ dock_station = NULL;
ret = -ENOMEM;
goto dock_add_err_unregister;
}
@@ -779,6 +784,7 @@ dock_add_err_unregister:
device_remove_file(&dock_device.dev, &dev_attr_uid);
platform_device_unregister(&dock_device);
kfree(dock_station);
+ dock_station = NULL;
return ret;
}
@@ -813,6 +819,7 @@ static int dock_remove(void)
/* free dock station memory */
kfree(dock_station);
+ dock_station = NULL;
return 0;
}