On Wed, Feb 01, 2017 at 05:39:02PM -0500, David Kershner wrote:
> From: David Binder <david.bin...@unisys.com>
> 
> Clarifies why the pointers returned from visorbus_get_device_by_id() in
> visorbus are validated. The check is performed in order to be extra
> careful, for the sake of added security, that the s-Par backend is
> providing us with a valid device.
> 
> Signed-off-by: David Binder <david.bin...@unisys.com>
> Signed-off-by: David Kershner <david.kersh...@unisys.com>
> ---
>  drivers/staging/unisys/visorbus/visorchipset.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/staging/unisys/visorbus/visorchipset.c 
> b/drivers/staging/unisys/visorbus/visorchipset.c
> index 188e224..07f8d05 100644
> --- a/drivers/staging/unisys/visorbus/visorchipset.c
> +++ b/drivers/staging/unisys/visorbus/visorchipset.c
> @@ -897,6 +897,7 @@ my_device_changestate(struct controlvm_message *inmsg)
>       int err;
>  
>       dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL);
> +     /* Validate that s-Par backend gave a good device */

Same comment here as the previous review, this comment really isn't
needed, right?

>       if (!dev_info) {
>               POSTCODE_LINUX(DEVICE_CHANGESTATE_FAILURE_PC, dev_no, bus_no,
>                              DIAG_SEVERITY_ERR);
> @@ -957,6 +958,7 @@ my_device_destroy(struct controlvm_message *inmsg)
>       int err;
>  
>       dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL);
> +     /* Validate that s-Par backend gave a good device */

Or here.

thanks,

greg k-h
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