This patch fix possible NULL pointer dereference if kzalloc
failed. To be able to return proper error code the function
return type is changed to ssize_t (according to callees and
sysfs definitions).
Signed-off-by: NCyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: NChristoph Lameter <clameter@sgi.com>