[PATCH] ipmi poweroff: fix chassis control

The IPMI power control function proc_write_chassctrl was badly written, it
directly used userspace pointers, it assumed that strings were NULL
terminated, and it used the evil sscanf function.  This converts over to
using the sysctl interface for this data and changes the semantics to be a
little more logical.

Signed-off-by: Corey Minyard <minyard@acm.org>
Cc: <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 7 insertions, 6 deletions

diff --git a/Documentation/IPMI.txt b/Documentation/IPMI.txt
index 84d3d4d10c17..bf1cf98d2a27 100644
--- a/Documentation/IPMI.txt
+++ b/Documentation/IPMI.txt
@@ -605,12 +605,13 @@ is in the ipmi_poweroff module.  When the system requests a powerdown,
 it will send the proper IPMI commands to do this.  This is supported on
 several platforms.
 
-There is a module parameter named "poweroff_control" that may either be zero
-(do a power down) or 2 (do a power cycle, power the system off, then power
-it on in a few seconds).  Setting ipmi_poweroff.poweroff_control=x will do
-the same thing on the kernel command line.  The parameter is also available
-via the proc filesystem in /proc/ipmi/poweroff_control.  Note that if the
-system does not support power cycling, it will always to the power off.
+There is a module parameter named "poweroff_powercycle" that may
+either be zero (do a power down) or non-zero (do a power cycle, power
+the system off, then power it on in a few seconds).  Setting
+ipmi_poweroff.poweroff_control=x will do the same thing on the kernel
+command line.  The parameter is also available via the proc filesystem
+in /proc/sys/dev/ipmi/poweroff_powercycle.  Note that if the system
+does not support power cycling, it will always do the power off.
 
 Note that if you have ACPI enabled, the system will prefer using ACPI to
 power off.