From: Francois Romieu <romieu@fr.zoreil.com>

There is no guarantee that the event which gets passed is associated to a
via-velocity device, thus preventing to dereference dev->priv as if it
always was a struct velocity_info *.  The via-velocity devices are kept in
a module private list for comparison.
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>