The patch titled
ACPI: dock: fix opps after dock driver fails to initialize
has been added to the -mm tree. Its filename is
acpi-dock-fix-opps-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: dock: fix opps 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>
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/acpi/dock.c | 7 +++++++
1 file changed, 7 insertions(+)
diff -puN drivers/acpi/dock.c~acpi-dock-fix-opps-after-dock-driver-fails-to-initialize drivers/acpi/dock.c
--- a/drivers/acpi/dock.c~acpi-dock-fix-opps-after-dock-driver-fails-to-initialize
+++ a/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;
}
_
Patches currently in -mm which might be from cebbert@xxxxxxxxxx are
origin.patch
acpi-dock-fix-opps-after-dock-driver-fails-to-initialize.patch
acpi-fix-oops-after-dock-driver-fails-to-initialize.patch
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