The patch titled
ACPI: fix oops after dock driver fails to initialize
has been added to the -mm tree. Its filename is
acpi-fix-oops-after-dock-driver-fails-to-initialize.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: ACPI: fix oops after dock driver fails to initialize
From: Chuck Ebbert <cebbert@xxxxxxxxxx>
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@xxxxxxxxxx>
Cc: Kristen Carlson Accardi <kristen.c.accardi@xxxxxxxxx>
Cc: Len Brown <lenb@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/acpi/dock.c | 26 ++++++++++++--------------
1 files changed, 12 insertions(+), 14 deletions(-)
diff -puN drivers/acpi/dock.c~acpi-fix-oops-after-dock-driver-fails-to-initialize drivers/acpi/dock.c
--- a/drivers/acpi/dock.c~acpi-fix-oops-after-dock-driver-fails-to-initialize
+++ a/drivers/acpi/dock.c
@@ -714,31 +714,24 @@ static int dock_add(acpi_handle handle)
dock_device.name = dock_device_name;
ret = platform_device_register(&dock_device);
if (ret) {
- printk(KERN_ERR PREFIX "Error %d registering dock device\n", ret);
- kfree(dock_station);
- return ret;
+ printk(KERN_ERR PREFIX "Error %d registering dock device\n",
+ ret);
+ goto err;
}
ret = device_create_file(&dock_device.dev, &dev_attr_docked);
if (ret) {
printk("Error %d adding sysfs file\n", ret);
- platform_device_unregister(&dock_device);
- kfree(dock_station);
- return ret;
+ goto err_register;
}
ret = device_create_file(&dock_device.dev, &dev_attr_undock);
if (ret) {
printk("Error %d adding sysfs file\n", ret);
- device_remove_file(&dock_device.dev, &dev_attr_docked);
- platform_device_unregister(&dock_device);
- kfree(dock_station);
- return ret;
+ goto err_sysfs_1;
}
ret = device_create_file(&dock_device.dev, &dev_attr_uid);
if (ret) {
printk("Error %d adding sysfs file\n", ret);
- platform_device_unregister(&dock_device);
- kfree(dock_station);
- return ret;
+ goto err_sysfs_2;
}
/* Find dependent devices */
@@ -749,7 +742,6 @@ static int dock_add(acpi_handle handle)
/* add the dock station as a device dependent on itself */
dd = alloc_dock_dependent_device(handle);
if (!dd) {
- kfree(dock_station);
ret = -ENOMEM;
goto dock_add_err_unregister;
}
@@ -773,10 +765,15 @@ static int dock_add(acpi_handle handle)
dock_add_err:
kfree(dd);
dock_add_err_unregister:
+err_sysfs_2:
device_remove_file(&dock_device.dev, &dev_attr_docked);
+err_sysfs_1:
device_remove_file(&dock_device.dev, &dev_attr_undock);
+err_register:
platform_device_unregister(&dock_device);
+err:
kfree(dock_station);
+ dock_station = NULL;
return ret;
}
@@ -810,6 +807,7 @@ static int dock_remove(void)
/* free dock station memory */
kfree(dock_station);
+ dock_station = NULL;
return 0;
}
_
Patches currently in -mm which might be from cebbert@xxxxxxxxxx are
origin.patch
acpi-fix-oops-after-dock-driver-fails-to-initialize.patch
-
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