Prevent a potential NULL pointer dereference (found
by code inspection) when unregistering an MMU handler.
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Mitko Haralanov <mitko.haralanov@intel.com>
Signed-off-by: Jubin John <jubin.john@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
struct mmu_rb_handler *handler = find_mmu_handler(root);
unsigned long flags;
+ if (!handler)
+ return;
+
spin_lock_irqsave(&mmu_rb_lock, flags);
list_del(&handler->list);
spin_unlock_irqrestore(&mmu_rb_lock, flags);